Crash of a Pilatus PC-12/47E in Whitehorse

Date & Time: Apr 17, 2023 at 1039 LT
Type of aircraft:
Operator:
Registration:
C-GMPX
Flight Type:
Survivors:
Yes
Schedule:
Whitehorse – Yellowknife
MSN:
1017
YOM:
2008
Country:
Crew on board:
1
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
The pilot departed Whitehorse-Erik Nielsen Airport Runway 32L on a positioning flight to Yellowknife. Shortly after takeoff, he declared an emergency and attempted to return. On short final, he lost control of the airplane that crashed within the airport boundary. The pilot was seriously injured and the airplane was destroyed.

Crash of a Cessna 208B Grand Caravan near Nakina: 2 killed

Date & Time: Feb 28, 2023
Type of aircraft:
Operator:
Registration:
C-GMVB
Flight Phase:
Flight Type:
Survivors:
No
Schedule:
Nakina – Fort Hope
MSN:
208B-0317
YOM:
1992
Location:
Country:
Crew on board:
2
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
2
Captain / Total flying hours:
325
Captain / Total hours on type:
103.00
Copilot / Total flying hours:
2570
Copilot / Total hours on type:
662
Aircraft flight hours:
28262
Circumstances:
On 28 February 2023, the Cessna 208B Caravan (208B) aircraft (registration C-GMVB) operated by 1401380 Ontario Limited, doing business as Wilderness North Air (WNA), was scheduled for 2 cargo flights from Nakina Airport (CYQN), Ontario, to Fort Hope Airport (CYFH), Ontario. The occurrence pilot, who had recently been promoted to pilot-in-command (PIC) on the 208B aircraft, was scheduled to fly alone in daytime visual flight rules (VFR) conditions. After reviewing the weather information with his colleagues at their morning briefing, he assessed that the weather was satisfactory for the flight and noted that the winds were forecast to be gusty. A pilot who was present at the briefing but was not scheduled for flight duty that day offered to accompany him. For all flights that day, the occurrence pilot would be the PIC and occupy the left seat, and the 2nd pilot went along as an extra crew member without any assigned duties, occupying the right seat. The cargo was loaded onto the aircraft, and the 1st flight of the day departed CYQN at 1020 and landed in CYFH at 1055. After unloading the cargo, they departed CYFH at 1120 and returned to CYQN at 1156. The pilots loaded the aircraft with cargo for their 2nd flight to CYFH. According to the load sheet, there were 3320 pounds of groceries and household goods on board. The pilots refuelled the aircraft and departed from Runway 27 at approximately 1245. A few minutes after departure, it was reported that they made a radio call on the aerodrome traffic frequency, indicating their location and an estimated time of arrival at CYFH of 1330. Approximately 30 minutes after the occurrence flight departed, a 2nd 208B aircraft (registration C-FUYC) operated by WNA departed also from CYQN to CYFH, with cargo for a different customer. The flight crew encountered snow showers en route, and shortly after they arrived at CYFH at 1400, there was a snow squall, which significantly reduced visibility. At that time, 2 customers were waiting at CYFH for their cargo, and it soon became apparent that the occurrence aircraft had not yet arrived. At approximately 1430, WNA personnel at CYQN were informed that the occurrence aircraft had not arrived at 1330 as expected. At 1445, management at WNA notified the Joint Rescue Coordination Centre (JRCC), in Trenton, Ontario, that the aircraft was overdue. WNA began its own aerial search along the flight path using C-FUYC, which departed CYFH at 1510 with 2 crew members on board, flew along the direct route of flight of the missing aircraft, and returned to CYQN at 1546. They refuelled the aircraft and departed on another search flight at 1620, with 2 additional pilots in the back to act as spotters. They searched along the route of flight until 1840 and returned to CYQN. JRCC had initiated its response at 1500, and the first tasked aircraft arrived in the search area at 1700. The search continued over the following 4 days. The occurrence aircraft was found on 04 March 2023, 30.8 nautical miles north-northwest of CYQN along the direct track to CYFH. Both pilots were fatally injured. The aircraft was destroyed by impact forces. There was no post-crash fire. There was no emergency locator transmitter (ELT) on the occurrence aircraft because it had been removed for recertification.
Probable cause:
During the en-route portion of the flight, over a remote area, the pilot lost control of the aircraft for an unknown reason, which resulted in the collision with terrain.
Final Report:

Crash of a Piper PA-46-350P Jetprop DLX in Goose Bay: 1 killed

Date & Time: Dec 14, 2022 at 1002 LT
Registration:
N5EQ
Flight Type:
Survivors:
Yes
Schedule:
Nashua – Goose Bay – Nuuk
MSN:
46-36051
YOM:
1996
Country:
Crew on board:
1
Crew fatalities:
Pax on board:
1
Pax fatalities:
Other fatalities:
Total fatalities:
1
Captain / Total flying hours:
2260
Captain / Total hours on type:
1046.00
Circumstances:
The single engine airplane departed Nashua Airport, New Hampshire, on December 13 on a flight to Nuuk, Greenland, with an intermediate stop in Goose Bay. Due to poor weather conditions at destination, the pilot diverted to Seven Islands Airport, Quebec, where the couple passed the overnight. On the morning of December 14, the airplane departed Seven Islands Airport at 0820LT bound for Goose Bay. At about 0958LT, the aircraft crossed the final approach fix / final approach waypoint FAFKO at 2,800 feet ASL, travelling at a ground speed of 104 knots, and began the final descent. Although the descent remained steady on a 3° profile, the ground speed decreased continuously for about 60 seconds. At 1000:31, the occurrence pilot reported at waypoint SATAK, and the ground speed had increased to above 80 knots. The tower provided the pilot with updated wind information and cleared the aircraft to land on Runway 08. The pilot acknowledged the clearance at 1000:49. Soon after, the ground speed began to decrease at a rate similar to the previous rate. At 1002:47, it had decreased to 51 knots. The aircraft departed controlled flight and impacted terrain when it was about 2.5 NM southwest of the airport along the extended centreline for Runway 08. The 406 MHz emergency locator transmitter activated, and the signal was received by the Joint Rescue Coordination Centre in Halifax, Nova Scotia, at 1006. A helicopter search and rescue mission was launched from Canadian Forces Base 5 Wing Goose Bay at 1036; the helicopter arrived at the accident site 3 minutes later. Medical technicians extricated the 2 occupants, who were both seriously injured. The occupants were airlifted to a waiting ambulance and then transported to the local hospital. The pilot later died of his injuries. The aircraft was destroyed.
Probable cause:
Given the absence of data for the last minute of the occurrence flight, the investigation could not determine the complete sequence of events that led to the loss of control and collision with terrain.
Final Report:

Crash of a De Havilland DHC-3 Otter in Pluto Lake

Date & Time: Oct 13, 2022 at 0929 LT
Type of aircraft:
Operator:
Registration:
C-FDDX
Survivors:
Yes
Schedule:
Mistissini - Pluto Lake
MSN:
165
YOM:
1956
Country:
Crew on board:
1
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Captain / Total flying hours:
1938
Captain / Total hours on type:
600.00
Aircraft flight hours:
17489
Circumstances:
On 12 October 2022, the True North Airways Inc. de Havilland DHC-3 Otter aircraft on floats (registration C-FDDX, serial number 165) was conducting a visual flight rules flight, with 1 pilot on board, from Mistissini Water Aerodrome (CSE6), Quebec, to Pluto Lake, Quebec, where it would deliver cargo and pick up passengers. At approximately 0929 Eastern Daylight Time, while manoeuvring for landing on Pluto Lake, the aircraft collided with the surface of the water. The pilot sustained serious injuries. The passengers, who had been waiting near the lake for the aircraft’s arrival, transported the pilot to a nearby cabin from where he was later taken to hospital by a search and rescue helicopter. The emergency locator transmitter activated. There was significant damage to the aircraft.
Probable cause:
3.1 Findings as to causes and contributing factors
These are conditions, acts or safety deficiencies that were found to have caused or contributed to this occurrence.
Due to the visual cues of the landing area that were visible to the pilot, the close proximity of the landing site where passengers were waiting, and the natural tendency to continue a plan under changing conditions, the pilot continued the approach despite visibility in the local area being below the minimum required for visual flight rules flight.
Owing to the reduced visibility, the pilot’s workload, while he was manoeuvring for landing, was high and his attention was focused predominantly outside the aircraft in order to keep the landing area in sight. As a result, a reduction in airspeed went unnoticed.
During the aircraft’s turn from base to final, the increased wing loading, combined with the reduced airspeed, resulted in a stall at an altitude too low to permit recovery.
The pilot was not wearing the shoulder harness while at the controls and operating the aircraft because he found it uncomfortable and other aircraft he flew were not equipped with one. As a result, during impact with the water, the pilot received serious injuries.

3.2 Findings as to risk
These are conditions, unsafe acts or safety deficiencies that were found not to be a factor in this occurrence but could have adverse consequences in future occurrences.
If aircraft stall warning systems do not provide multiple types of alerts warning the pilot of an impending stall, there is an increased risk that a visual stall warning alone will not be salient enough and go undetected when the pilot’s attention is focused outside the aircraft or during periods of high workload.
If aircraft operators do not ensure that their contact information on file with the Canadian Beacon Registry is accurate, there is a risk that search and rescue operations may be delayed.
If companies do not employ robust flight-following procedures, there is a risk that, after an accident, potentially life-saving search and rescue services will be delayed.

3.3 Other findings
These items could enhance safety, resolve an issue of controversy, or provide a data point for future safety studies.
The occurrence aircraft was carrying dangerous goods on board, even though the operator was not authorized to do so on its DHC-3 Otter aircraft.
For unknown reasons, the pilot encountered difficulty inflating his personal flotation device, and because of his proximity to the shore, he removed it to make it easier to swim.
Final Report:

Crash of a Cessna 208 Caravan I in Lake Seul

Date & Time: Mar 8, 2022 at 1310 LT
Type of aircraft:
Operator:
Registration:
C-GIPR
Flight Phase:
Survivors:
Yes
Schedule:
Sioux Lookout – Springpole Lake
MSN:
208-0343
YOM:
2001
Country:
Crew on board:
1
Crew fatalities:
Pax on board:
1
Pax fatalities:
Other fatalities:
Total fatalities:
0
Captain / Total flying hours:
1315
Captain / Total hours on type:
126.00
Circumstances:
On 08 March 2022, the Bamaji Air Inc. (Bamaji) wheel-equipped Cessna 208 Caravan aircraft (registration C-GIPR, serial number 20800343) was conducting a series of visual flight rules (VFR) flights from Sioux Lookout Airport (CYXL), Ontario. At 1031, after checking the aerodrome forecast (TAF) valid from 0900 to 2000, and the graphic area forecast (GFA) valid from 0600 to 1800, the pilot departed on a flight to an ice runway on Springpole Lake, Ontario, about 78 nautical miles (NM) north-northwest of CYXL. The aircraft returned to CYXL with 2 passengers at 1200. In preparation for a second flight to Springpole Lake, the pilot loaded approximately 900 pounds of freight into the cabin and secured it under a cargo net. The aircraft had 750 pounds of fuel remaining on board, which was sufficient for the planned flight. The pilot and 1 passenger boarded the aircraft. The pilot occupied the left cockpit seat and the passenger occupied the right cockpit seat. Both occupants were wearing the available 5-point-harness safety belt system. At 1250, a snow squall began to move across CYXL, reducing ground visibility. The pilot taxied the aircraft to a position on the apron and waited for the fast-moving snow squall to pass. At 1301, the pilot taxied the aircraft to Runway 34 and took off in visual meteorological conditions. The aircraft climbed to approximately 1800 feet above sea level (ASL), then, once clear of the control zone, it descended to approximately 1600 to 1700 feet ASL, roughly 500 to 600 feet above ground level (AGL), to remain below the overcast ceiling. As the aircraft began to cross Lac Seul, Ontario, the visibility straight ahead and to the west was good. However, when the aircraft was roughly midway across the lake, it encountered turbulence and immediately became enveloped in whiteout conditions generated by a snow squall. The pilot turned his head to inspect the left wing and saw that ice appeared to be accumulating on the leading edge. He turned his attention back to the flight instruments and saw that the altimeter was descending rapidly. He then pulled back on the control column to stop the descent; however, within a few seconds, the aircraft struck the frozen surface of Lac Seul, approximately 17 NM north-northwest of CYXL. The aircraft was substantially damaged. There was no fire. The aircraft occupants received minor injuries. The Artex Model Me406 emergency locator transmitter (ELT) activated on impact and the signal was detected by the Cospas-Sarsat satellite system. The Joint Rescue Coordination Centre in Trenton, Ontario, re-tasked a Royal Canadian Air Force aircraft that was in the area and 3 search and rescue technicians (SAR Techs) parachuted into the site within 1 hour of the accident. The aircraft occupants and the SAR Techs were extracted from the site by a civilian helicopter later that day.
Probable cause:
The accident occurred while the aircraft was crossing a large, frozen, snow-covered lake at low altitude. Other than some small islands and the distant treed shorelines, there were few features to provide visual references. The terrain, coupled with the snow squalls that were passing through the area generated circumstances conducive to the creation of localized whiteout conditions.
Final Report:

Crash of a Beechcraft 350 Super King Air in Thunder Bay

Date & Time: Jan 31, 2022 at 1222 LT
Operator:
Registration:
C-GEAS
Survivors:
Yes
Schedule:
Trenton - Thunder Bay
MSN:
FL-17
YOM:
1990
Country:
Crew on board:
3
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
Following an uneventful flight from RCAF Trenton on behalf of the RCAF, the twin engine aircraft apparently landed hard at Thunder Bay Airport. After touchdown on runway 25, it went out of control and veered off runway into a snow covered area. All three crew members evacuated safely while the aircraft suffered severe damages to wings and tail. The fuselage also broke in two.

Crash of a Socata TBM-910 in Westlock

Date & Time: Oct 10, 2021 at 1102 LT
Type of aircraft:
Registration:
C-FFYM
Flight Type:
Survivors:
Yes
Schedule:
Vernon – Calgary – Westlock
MSN:
1190
YOM:
2017
Country:
Crew on board:
1
Crew fatalities:
Pax on board:
3
Pax fatalities:
Other fatalities:
Total fatalities:
0
Captain / Total hours on type:
235.00
Aircraft flight hours:
449
Circumstances:
The airplane was conducting an instrument flight rules flight from Vernon Airport, British Columbia, to Westlock Aerodrome, Alberta, with a stop at Calgary/Springbank Airport, Alberta, to pick up passengers, after which 1 pilot and 3 passengers were on board. At 1102:26 Mountain Daylight Time, while the aircraft was landing on Runway 28 at Westlock Aerodrome, the aircraft bounced and the pilot initiated a go-around. During the application of engine power for the go-around, the aircraft rolled to the left, struck the runway inverted, and came to rest on the runway’s south side. The 3 passengers exited the aircraft through the main cabin door with the assistance of persons nearby. One passenger received serious injuries, and the other 2 had minor injuries. The pilot, who was seriously injured, was trapped in the cockpit for approximately 2 hours before first responders could safely rescue him from the wreckage. An emergency locator transmitter signal was received by the search and rescue satellite system. The aircraft was significantly damaged and there was no post-impact fire.
Probable cause:
Findings as to causes and contributing factors:
1. The aircraft joined the final approach well above the optimal 3° descent path and, during the steep approach that followed, the aircraft’s airspeed continually decelerated and resulted in an unstabilized approach.
2. On short final, the pilot reduced the rate of descent by increasing pitch rather than by adding power. As a result, the airspeed continued to decrease and the aircraft entered a stall, resulting in a hard landing and a subsequent bounce.
3. During the attempted rejected landing, the aircraft entered a 25° nose-high attitude and approached a stall condition. This low-speed condition combined with the high power setting resulted in the aircraft entering a rapid roll to the left and striking the runway in an inverted attitude.
4. The passengers did not receive a safety briefing before departure or before landing, and multiple items in the cabin were not secured. As a result, 1 passenger sustained serious injuries due to the deceleration forces and the loose items that were thrown around in the cabin during the accident.
5. The pilot was not wearing the available shoulder harness, and his torso was unrestrained during the impact. As a result, he sustained serious injuries.

Findings as to risk:
1. If pilots do not declare all health issues to Transport Canada Civil Aviation Medical Examiners and pilots’ family physicians do not declare issues assessed to be a risk to aviation safety to Transport Canada, there is an increased risk that pilots will operate with diagnosed medical conditions or medical side effects that could affect flight safety.
2. If an aircraft propeller is rotating and passengers are not supervised during boarding operations, there is a risk that passengers may inadvertently contact the propeller, potentially causing fatal injuries.

Other findings:
1. Following a review of the pilot’s medical history and prescription medication use, the investigation determined that the medication did not contribute to the accident.
Final Report:

Crash of a Rockwell Grand Commander 690B in Thunder Bay: 1 killed

Date & Time: Aug 16, 2021 at 2109 LT
Operator:
Registration:
C-GYLD
Flight Phase:
Flight Type:
Survivors:
No
Schedule:
Thunder Bay – Dryden
MSN:
690-11426
YOM:
1977
Flight number:
BD160
Country:
Crew on board:
1
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
1
Captain / Total flying hours:
2662
Captain / Total hours on type:
230.00
Aircraft flight hours:
7620
Circumstances:
The airplane, operated by MAG Aerospace Canada Corp. as flight BD160, was conducting a visual flight rules flight from Thunder Bay Airport, Ontario, to Dryden Regional Airport, Ontario, with only the pilot on board. At 2109 Eastern Daylight Time, the aircraft began a takeoff on Runway 12. Shortly after rotation, the aircraft entered a left bank, continued to roll, and then struck the surface of Runway 07 in an inverted attitude. The pilot was fatally injured. The aircraft was destroyed by the impact and postimpact fire. The emergency locator transmitter activated on impact.
Probable cause:
Findings as to causes and contributing factors:
1. After takeoff from Runway 12 at Thunder Bay Airport, Ontario, as the pilot conducted a rapid, low-level, climbing steep turn, the aircraft entered an accelerated stall that resulted in a loss of control and subsequent collision with the surface of Runway 07 in an inverted attitude.
2. The decision to conduct the rapid, low-level, climbing steep turn was likely influenced by an altered perception of risk from previous similar takeoffs that did not result in any adverse consequences.

Findings as to risk:
1. If air traffic controllers engage in communications that may be perceived by pilots to encourage unusual flight manoeuvres, pilots may perceive this encouragement as a confirmation that the manoeuvres are acceptable to perform, increasing the risk of an accident.
2. If NAV CANADA’s reporting procedures do not contain specific criteria for situations where air traffic services personnel perceive aircraft to be conducting unsafe flight manoeuvres, there is a risk that these manoeuvres will continue and result in an accident.

Other findings
1. Most of the wires that comprised the elevator trim cable failed before the impact as a result of excessive wear; however, this did not contribute to the occurrence because the trim tab remained in the normal take-off position.
Final Report:

Crash of a Piper PA-60-602P Super 700 Aerostar on Gabriola Island: 3 killed

Date & Time: Dec 10, 2019 at 1805 LT
Operator:
Registration:
C-FQYW
Flight Type:
Survivors:
No
Schedule:
Cabo San Lucas – Chino – Bishop – Nanaimo
MSN:
60-8265-020
YOM:
1982
Country:
Crew on board:
1
Crew fatalities:
Pax on board:
2
Pax fatalities:
Other fatalities:
Total fatalities:
3
Captain / Total flying hours:
320
Aircraft flight hours:
5752
Circumstances:
On 09 December 2019, a private Piper Aerostar PA-60-602P aircraft (registration C-FQYW, serial number 60-8265020), departed Cabo San Lucas International Airport (MMSL), Baja California Sur, Mexico, with 3 people on board, for a 2-day trip to Nanaimo Airport (CYCD), British Columbia (BC). As planned the aircraft stopped for an overnight rest at Chino Airport (KCNO), California, U.S. At 1142, on 10 December 2019, the aircraft departed KCNO on a visual flight rules (VFR) flight plan to Bishop Airport (KBIH), California, U.S., for a planned fuel stop. The aircraft departed KBIH at approximately 1425 on an instrument flight rules (IFR) flight plan to CYCD. On 10 December 2019, night started at 1654. At 1741, the Vancouver area control centre air traffic controller advised the pilot that an aerodrome special meteorological report (SPECI) had been issued for CYCD at 1731. The SPECI reported visibility as 2 ½ statute miles (SM) in light drizzle and mist, with an overcast ceiling of 400 feet above ground level (AGL). The pilot informed the controller that he would be conducting an instrument landing system (ILS) approach for Runway 16. At 1749, when the aircraft was approximately 32 nautical miles (NM) south of CYCD, the pilot contacted the controller to inquire about the weather conditions at Victoria International Airport (CYYJ), BC. The controller informed the pilot that a SPECI was issued for CYYJ at 1709 and it reported the visibility as 5 SM in mist, a broken ceiling at 600 feet AGL, and an overcast layer at 1200 feet AGL. The controller provided the occurrence flight with pilot observations from another aircraft that had landed at CYCD approximately 15 minutes before. That crew had reported being able to see the Runway 16 approach lights at minimums, i.e., at 373 feet AGL. Between 1753 and 1802, the controller provided vectors to the pilot in order to intercept the ILS localizer. At 1803, the controller observed that the aircraft had not intercepted the localizer for Runway 16. The aircraft had continued to the southwest, past the localizer, at an altitude of 2100 feet above sea level (ASL) and a ground speed of 140 knots. The controller queried the pilot to confirm that he was still planning to intercept the ILS for Runway 16. The pilot confirmed that he would be intercepting the ILS as planned. The aircraft made a heading correction and momentarily lined up with the localizer before beginning a turn to the west. At 1804:03, the pilot requested vectors from the controller and informed him that he “just had a fail.” The controller responded with instructions to “turn left heading zero nine zero, tight left turn.” The pilot asked the controller to repeat the heading. The controller responded with instructions to “…turn right heading three six zero.” The pilot acknowledged the heading; however, the aircraft continued turning right beyond the assigned heading while climbing to 2500 feet ASL and slowing to a ground speed of 80 knots. The aircraft then began to descend, picking up speed as it was losing altitude. At 1804:33, the aircraft descended to 1800 feet ASL and reached a ground speed of 160 knots. At 1804:40, the pilot informed the air traffic controller that the aircraft had lost its attitude indicator.Footnote6 At the same time, the aircraft was climbing into a 2nd right turn. At 1804:44, the air traffic controller asked the pilot what he needed from him; the pilot replied he needed a heading. The controller provided the pilot with a heading of three six zero. At 1804:47, the aircraft reached an altitude of 2700 feet ASL and a ground speed of 60 knots. The aircraft continued its right turn and began to lose altitude. The controller instructed the pilot to gain altitude if he was able to; however, the pilot did not acknowledge the instruction. The last encoded radar return for the aircraft was at 1805:26, when the aircraft was at 300 feet ASL and travelling at a ground speed of 120 knotsControl of the aircraft was lost. The aircraft collided with a power pole and trees in a wooded park area on Gabriola Island, BC, and then impacted the ground. The aircraft broke into pieces and caught fire. The 3 occupants on board received fatal injuries. As a result of being damaged in the accident, the emergency locator transmitter (Artex ME406, serial number 188-00293) did not activate.
Probable cause:
The occurrence aircraft was equipped with a BendixKing KI 825 electronic horizontal situation indicator (HSI) that was interfaced to the flight control system and GPS (global positioning system) Garmin GNS530W/430W. The HSI also supplies the autopilot system with heading information. The investigation determined that the HSI had failed briefly during operation on 22 November 2019 and a 2nd time, 3 days later, on 26 November 2019. The KI 825 HSI is electrically driven and therefore is either on and working, or off and dark with no display. The aircraft owner was in contact with an aircraft maintenance organization located at Boundary Bay Airport (CZBB), BC, and an appointment to bring the occurrence aircraft in for troubleshooting of the 2 brief HSI malfunctions had been made for 11 December 2019, i.e., the day after the accident. In total, 13 flights had been conducted after the 1st failure of the HSI. There were no journey log entries for defects with the HSI or evidence of maintenance completed. RegulationsFootnote9 require that defects that become apparent during flight operations be entered in the aircraft journey logbook, and advisory guidance in the regulatory standardsFootnote10 states that all equipment required for a particular flight or type of operation, such as the HSI in this case, be functioning correctly before flight. The HSI was destroyed in the accident and the investigation was unable to determine if it was operational on impact. Similarly, it could not be determined if the HSI was supplying the autopilot with heading information, or if the autopilot was engaged during the approach.
Final Report:

Crash of a De Havilland DHC-3 Otter off Little Grand Rapids: 3 killed

Date & Time: Oct 26, 2019 at 0845 LT
Type of aircraft:
Operator:
Registration:
C-GBTU
Survivors:
No
Schedule:
Bissett - Little Grand Rapids
MSN:
209
YOM:
1957
Country:
Crew on board:
1
Crew fatalities:
Pax on board:
2
Pax fatalities:
Other fatalities:
Total fatalities:
3
Captain / Total flying hours:
9500
Captain / Total hours on type:
5800.00
Aircraft flight hours:
16474
Circumstances:
At approximately 0745 Central Daylight Time on 26 October 2019, the Blue Water Aviation float-equipped deHavillandDHC-3 Otteraircraft (registration C-GBTU, serial number 209) departed Bissett Water Aerodrome, Manitoba, with the pilot, 2 passengers, and approximately 800 pounds of freight on board. The destination was Little Grand Rapids, Manitoba, on the eastern shore of Family Lake. At approximately 0845, while on approach to Family Lake, the aircraft’s right wing separated from the fuselage. The aircraft then entered a nose-down attitudeand struck the water surface of the lake. The pilot and the 2 passengers were fatally injured. The aircraft was destroyed by impact forces. The emergency locator transmitter activated momentarily.
Probable cause:
Findings as to causes and contributing factors:
These are conditions, acts or safety deficiencies that were found to have caused or contributed to this occurrence.
1. A fatigue fracture originated in the bolt hole bore of the right-hand wing lift strut’s upper outboard lug plate, and eventually led to an overstress fracture of the right-hand wing lift strut’s upper outboard and inboard lug plates during the left turn prior to the final approach.
2. The failure of the outboard and inboard lug plates led to the separation of the righthand wing lift strut from the wing and, subsequently, the separation of the right wing from the aircraft.

Findings as to risk:
These are conditions, unsafe acts or safety deficiencies that were found not to be a factor in this occurrence but could have adverse consequences in future occurrences.
1. If operational flight plans data and load calculations are not available, there is a risk that, in the event of a missing aircraft or accident, aircraft information, including its number of occupants, route, cargo, and weight and balance information, will not be available for search and rescue operations or accident investigation.

Other findings:
These items could enhance safety, resolve an issue of controversy, or provide a data point for future safety studies.
1. The detailed visual inspection prescribed in the Viking Air Ltd. Supplementary Inspection and Corrosion Control Manual, and required by Airworthiness DirectiveCF2018-4, did not identify cracks that could form in the right-hand wing strut’s upper outboard lug plate.
Final Report: