Crash of a Douglas R6D-1 on Mt Waianae: 66 killed

Date & Time: Mar 22, 1955 at 0203 LT
Type of aircraft:
Operator:
Registration:
131612
Flight Type:
Survivors:
No
Site:
Schedule:
Tokyo – Hickam – Travis
MSN:
43715
YOM:
1953
Crew on board:
6
Crew fatalities:
Pax on board:
60
Pax fatalities:
Other fatalities:
Total fatalities:
66
Circumstances:
The four engine aircraft was completing a personnel transfer flight from Tokyo to Travis AFB, California, with an intermediate stop at Hickam AFB, Honolulu. Few minutes after his departure from Hickam Field, the pilot informed ground he encountered technical issues with the high frequency transmission system and elected to return for a safe landing. Approaching by night from the northwest, the aircraft hit the slope of Mt Waianae located about 18 miles from the airfield. The aircraft disintegrated on impact and all 66 occupants were killed.
Crew:
Lt Cdr Harold M. Oleary, pilot,
Lt Cdr Mark M. Teague, copilot,
Lt Lee A. Thoroux, navigator,
Ad1 Charles L. Osborne,
At3 Charles M. Preston,
An James B. Quinn Jr.
Passengers:
US Air Force Personnel:
T/Sgt Albert E. Dawsey
T/Sgt John T. Powell,
T/Sgt Roland B. Wilhelm,
S/Sgt Samuel J. Alvarado,
S/Sgt William F. Britt,
S/Sgt Carlyle J. Hummel,
S/Sgt Eugene L. Lofton,
S/Sgt Thaddeus F. Shyda,
A1c Willie G. Harrell,
A1c Milton O. Matthews,
A1c Aubrey G. Morgan,
A1c Earl G. Sisson,
A1c Alvin Alxander,
A2c John D. Anthony,
A2c David L. Boyle,
A2c Stanley B. Horton,
A3c Daniel K. Eaton.
US Army:
Cpl Donald B. Anderson,
Pfc Paul B. Bayer,
Cpl Dean C. Bullen,
Pvt Robert E. Delhager,
Sgt Raymond L. Smith,
Sgt Robert L. Thompson,
Sgt Rexie L. Dewesse,
Sgt Larry P. Dieuolo,
Pfc Robert G. Duncan,
Cpl Edward J. Halvey Jr.,
Cpl William B. Hendon,
Pfc Robert E. Hill,
Cpl Kenneth G. Hoffman,
Cpl David A. Horne,
Pvt Charles J. Combs,
Sgt Warren R. Huler,
Pfc John R. Irwin Jr.,
Pvt Charles M. Johnson,
Pfc Bernard J. Kuras,
Pvt Louis F. Montanez,
Pvt John R. Panetti,
Sgt James L. White.
US Marine Corps:
M/Sgt Frederick L. Williamson,
M/Sgt Eugene E. Bennett,
Cpl Richard C. Harrison,
Lt Col C. G. Edwards,
M/Sgt Gordon B. Murray,
S/Sgt Morgan L. Ogden,
Cpl Walter W. Chase,
Cpl Dale L. Lake,
Cpl Michael J. Meszaros,
Cpl Almeron Freeman,
Cpl Cecil A. Brittain,
Cpl Richard R. Brooks.
US Navy:
An Charles Wayne Enloe,
Na William Richard Rimer,
Sa Gerald Joseph Robichaux,
Ae3 Alfred Dewey Schroeder,
Charles Edward Sheehan,
Te1 Nathan Webb,
Mrs. Rita Laverne Webb and her daughter,
Gerald Dean White.
Probable cause:
It was determined that the aircraft was off course about 8 miles at the time of the accident, apparently due to a navigation error on part of the flying crew who failed to adhere to the approach procedures. Low visibility caused by night, clouds and rain falls was considered as a contributing factor.

Crash of a Douglas DC-6 on Mt Costone dell'Acquasanta: 29 killed

Date & Time: Feb 13, 1955 at 1953 LT
Type of aircraft:
Operator:
Registration:
OO-SDB
Flight Phase:
Survivors:
No
Site:
Schedule:
Brussels – Rome – Athens – Cairo – Elisabethville
MSN:
43063
YOM:
1947
Flight number:
SN503
Country:
Region:
Crew on board:
8
Crew fatalities:
Pax on board:
21
Pax fatalities:
Other fatalities:
Total fatalities:
29
Circumstances:
The aircraft departed the Brussels-Haren Airport for Rome at 1717LT on an IFR flight plan. According to radio communications between the aircraft and the area controls at Zurich, Milan and Rome the flight appears to have been normal. The aircraft was in touch with Rome area control at 1929LT and the last message from it was received at 1953LT. At about 1950LT the aircraft after overflying the village of Leonessa and continued on a heading of 163° until it hit the slope of the Mt Costone dell'Acquasanta at an altitude of 1,700 meters after breaking off the tops of trees in a wood in line with the point of impact, near the end of its course. The wreckage was found one week later only and all 29 occupants have been killed, among them the Italian actress Marcella Mariani.
Probable cause:
The probable cause of the accident was that the navigation was conducted without making use of all such radio aids as would have permitted checking, and consequently correcting the drift of the aircraft, whereas the crew actually remained unaware of the drift. In fact, instead of making sure they were over the Viterbo beacon, they merely held that conviction, and therefore the approach procedure to the Rome terminal area (which prescribes overflight of the Viterbo beacon) was erroneously applied. The following contributing causes may be taken into consideration:
- crosswind to the route stronger than forecast,
- weather conditions particularly unfavorable to radio reception in MF,
- None of the messages from the aircraft gave the impression that the crew were in any doubt as to their position,
- The gradual uncontrolled eastward drift may be assumed to have started along the Alpine route, in view of the atmospheric conditions then prevailing, and particularly because of the jet stream previously mentioned,
- The message "passed Viterbo beacon one minute ago" sent by the aircraft at 1951LT was certainly an error, actually, the aircraft struck the surface at 1853 at a point more than 60 km east of Viterbo on a heading of 163°.
Final Report:

Crash of a Douglas DC-6B in New York: 26 killed

Date & Time: Dec 18, 1954 at 1400 LT
Type of aircraft:
Operator:
Registration:
I-LINE
Survivors:
Yes
Schedule:
Rome – Milan – Paris – Shannon – Gander – Boston – New York
MSN:
44418
YOM:
1954
Flight number:
LAI451
Crew on board:
10
Crew fatalities:
Pax on board:
22
Pax fatalities:
Other fatalities:
Total fatalities:
26
Captain / Total flying hours:
14734
Captain / Total hours on type:
3356.00
Copilot / Total flying hours:
7546
Copilot / Total hours on type:
3670
Aircraft flight hours:
1424
Circumstances:
After an uneventful instrument flight involving no Air Route Traffic Control routing and control, Flight 451 reported at 1122 to the Idlewild Approach Control as being aver the Mitchell Radio Range Station at 7,000 feet. The flight was then cleared to enter the Scotland holding pattern (located approximately 13 nautical miles southwest of the airport) and was subsequently "laddered down" to the number one position to approach. Between 1147 and 1159 weather conditions deteriorated below the ceiling minimum of 400 feet for landing on runway 22, the runway then in use. The flight continued to hold. At 1159 reported weather conditions improved and I-LINE was cleared for an approach to runway 22 using the back course of the ILS (Instrument Landing System). At 1218 the flight reported it had discontinued this approach. It was then issued missed-approach instructions and returned to the Scotland holding pattern. Shortly thereafter weather conditions were again reported below minimums for runway 22. They were then reported as: Ceiling 300 feet, broken, 2,500 feet, overcast; visibility 2-1/2 miles, light rain and fog; wind south-southeast 20 knots. While holding, the flight was asked by Approach Control if it would be able to make an approach to runway 4, the ILS runway, considering the tailwind component. The flight accepted runway 4 and was cleared at 1307 for an ILS approach. At 1313 the tower was advised by 451 that the approach had been missed. The flight was next offered, and it accepted, a GCA (Ground Controlled Approach). This approach was abandoned at 1324, a missed-approach procedure was followed, and the flight returned to Scotland. At 1327 the Italian Airlines Station Manager, in a message relayed by the tower, asked the flight its remaining fuel, and received the reply that there was three hours of holding fuel. The Station Manager then suggested that the flight hold for 1-1/2 hours and if unable to land to proceed to Washington, D. C. At 1329 the flight acknowledged this message. At 1349 the flight was again cleared for an ILS approach, the third approach to runway 4 and its fourth to the airport. At approximately 1400 the aircraft struck the left pier. The impact was accompanied by a violent explosion and followed by an intense fire. Tower personnel immediately sounded the crash alarm and initiated emergency procedures. At the time of the accident weather conditions were reported as: Ceiling 200 overcast; visibility 2-1/2 miles, light rain and fog; wind south-southeast 16 knots. Italian Airlines' minimums for ILS approaches to runway 4 are ceiling 200 feet and visibility 1/2 mile. The aircraft was destroyed and all 10 crew members and 16 passengers were killed, six others were injured.
Probable cause:
The Board determines that the probable cause of this accident was an erratic approach which resulted in a descent to an altitude too low to avoid striking the pier. A contributing factor to this accident was pilot fatigue due to the particular and difficult circumstances. The following findings were reported:
- The flight made four instrument approaches to the Idlewild Airport, one to runway 22 and three to runway 4,
- The three approaches to runway 4 were made with a downwind component approximately 8 knots,
- There were no language difficulties between the flight crew and control personnel,
- Prior to the last approach weather and altimeter information was given the flight,
- The weather information was adequate for the normal ILS breakout area,
- Radar advisories were given the flight during the ILS approaches and during the last approach the flight was repeatedly advised that it was low with respect to normal ILS altitudes,
- The last approach was apparently made without using the ILS glide path,
- The radio navigational and landing facilities for the airport were functioning normally,
- When the aircraft struck the pier it was nearly level laterally, slightly nose-high, and without appreciable descent,
- Approximately 80 percent of the wreckage was recovered, the examination of which revealed no structural or mechanical failure of the power units, propellers, airframe, controls, or instruments prior to impact,
- The crew reported no mechanical or other difficulty.
Final Report:

Crash of a Douglas DC-6B off Ijmuiden: 21 killed

Date & Time: Aug 23, 1954 at 1130 LT
Type of aircraft:
Operator:
Registration:
PH-DFO
Survivors:
No
Schedule:
New York – Shannon – Amsterdam
MSN:
43556
YOM:
1952
Flight number:
KL633
Country:
Region:
Crew on board:
9
Crew fatalities:
Pax on board:
12
Pax fatalities:
Other fatalities:
Total fatalities:
21
Aircraft flight hours:
6308
Circumstances:
While approaching Amsterdam-Schiphol Airport after an uneventful flight from New York via Shannon, the crew received the permission to descend to 5,500 feet and then 4,500 feet and 3,500 feet respectively. At 1130LT, the four engine aircraft christened 'Willem Bontekoe' disappeared from the radar screens after it crashed into the sea. About five minutes after the disappearance, ATC cleared the crew to descend to 2,500 feet but did not receive any feedback. SAR operations were hampered by poor weather conditions and first debris were found at 1610LT about 37 km northwest of Ijmuiden. None of the 21 occupants survived the crash and less than 50% of the aircraft was recovered.
Probable cause:
Investigations were unable to determine the exact cause of the accident. Nevertheless, a number of hypothesis as to the cause of the accident were developed. Some possibilities considered were:
- overheating of the electric system with heavy smoke development,
- explosion of one of the high pressure bottles,
- failure of a cockpit window,
- failure of the automatic pilot system.
However, no hypothesis could be formulated in which all occurrences and evidence could be made reasonably acceptable. Therefore, in November 1955, after a 15-months' period of intensive investigation, the conclusion had to be drawn that the cause of the accident could not be established.
Final Report:

Crash of a Douglas DC-6 in Rome: 16 killed

Date & Time: Jan 14, 1954 at 1150 LT
Type of aircraft:
Operator:
Registration:
PI-C294
Survivors:
No
Schedule:
Manila – Bangkok – Karachi – Beirut – Rome – Zurich – Hamburg – London
MSN:
42902
YOM:
1947
Country:
Region:
Crew on board:
7
Crew fatalities:
Pax on board:
9
Pax fatalities:
Other fatalities:
Total fatalities:
16
Circumstances:
On final approach to Rome-Ciampino Airport, the crew encountered marginal weather conditions. While descending through clouds at an altitude of 6,500 feet, the crew informed ground about fire on right engine. It is believed that both right engines were on fire at this time. The pilot-in-command reduced his altitude in an attempt to make an emergency landing when, at a height of 650 feet, the airplane plunged into the earth and crashed in a huge explosion in a field located about six km east of Ciampino Airfield. The four engine aircraft disintegrated on impact and all 16 occupants have been killed. A crater was seen at the point of impact and debris were scattered on a wide area.
Probable cause:
Technical issues or fire on both right engines was not confirmed by investigations. However, some unforeseen fact to which the aircraft was subjected, as a result of which, being no longer under control, it went into a steep dive, probably on account of wing drop in the clouds, and crashed to the ground after an uncompleted pull-out. The Committee, although unable to affirm that wing drop could have been caused by atmospheric conditions, wishes to point out that there was pronounced turbulence in the area.

Crash of a Douglas DC-6 near Half Moon Bay: 19 killed

Date & Time: Oct 29, 1953 at 0843 LT
Type of aircraft:
Operator:
Registration:
VH-BPE
Survivors:
No
Site:
Schedule:
Sydney – Nadi – Canton – Honolulu – San Francisco
MSN:
43125
YOM:
1948
Flight number:
BCP304
Crew on board:
8
Crew fatalities:
Pax on board:
11
Pax fatalities:
Other fatalities:
Total fatalities:
19
Captain / Total flying hours:
10696
Captain / Total hours on type:
4136.00
Copilot / Total flying hours:
4782
Copilot / Total hours on type:
3896
Aircraft flight hours:
5904
Circumstances:
British Commonwealth Pacific Airlines' Flight 304/44 of October 28. 1953, was scheduled between Sydney, Australia., and San Francisco., California., with intermediate stops at Nadi., Fiji Island, Canton Island., and Honolulu, T. H. The flight to Honolulu was without incident. A routine crew change was effected at Honolulu and the new crew consisted of Captain B. N. Dickson. First Officer F. A. Campbell. Navigator G. R. Murtagh. Radio Officer V. A. Walker, Flight Engineer C. N. Cattanach., Purser W. Knight and Hostesses J. F. Elder and A. K. Lewis. Following a briefing on expected en route and terminal weather by U. S. Weather Bureau personnel: the crew filed an IFR (Instrument Flight Rules) flight plan with ARTC (Air Route Traffic Control) which indicated a rhumb line course was to be flown to San Francisco with Sacramento, California,, the alternate airport. The estimated flying time of the flight was nine hours and 25 minutes and there was 12 hours and 53 minutes of fuel on board. Flight 304/44 departed Honolulu at 2259, October 28, 1953, with 10 adult passengers and one child. According to company records., the gross takeoff weight of the aircraft was 90,166 pounds which was below the allowable gross takeoff weight of 95,200 pounds and the load was properly distributed with respect to the center of gravity of the aircraft. Following departure from Honolulu, the flight called the tower and requested to leave tower frequency. This request was granted. At 2302, the flight again called the tower and reported that it was over Diamond Head requesting permission to return to the airport. At this time the pilot stated, "We're having a little trouble with one of the props." The IFR flight plan was then cancelled. Three minutes later when over the airport the flight reported: "The relay is working okay now; desire to continue flight." Upon receipt of this message., ARTC revalidated the original clearance and the flight proceeded on course. As the flight proceeded toward San Francisco hourly routine position reports were made to OFACS (Overseas Foreign Aeronautical Communication Station). At 0555, the following message was sent by the flight: "VHBPE Position 32.39N 134,40W. Time 13502 (0550). Altitude 11,500. Track 064 degrees. Ground speed 225 knots. Estimating over SFO at 1640Z (0840). Estimating arrival at Blocks 1650Z (0850)." Communications to and from the flight were then changed from CW (code) to voice. In answer to a request from the flight, San Francisco ARTC,, at 0807, cleared it to descend in accordance with Visual Flight Rules and to maintain at least 500 feet on top of clouds. The flight reported that it was starting descent at 0815 and at that time was given the San Francisco 0800 weather: "Measured ceiling 1.200 feet. broken. visibility nine statute miles. temperature 54. dew point 50, wind west 12 knots and altimeter 30.13." As the aircraft approached the coast, it was identified by Western Air Defense Force Radar and released from corridor assignment at 0821. ARTC shortly there after cleared VHBPE as follows: "ATC clears VHBPE to the San Francisco ILS Outer Marker via the Half Moon Bay Fan Marker direct to the San Francisco Outer Marker. Maintain at least 500 feet above all clouds. Contact San Francisco Approach Control after passing Half Moon Bay Fan Marker. Cloud tops reported in the Bay area l.,700 feet." This message was acknowledged and repeated back. The last communication from the flight heard by OFACS was at 0823 when the aircraft reported approximately 60 miles west of the coast. At 0839., the flight called San Francisco Approach Control on 3105 kc., identified itself as "Air Pacific Echo" and advised that it was over Half Moon Bay. 500 on top and was listening on 278 kc. Approach Control acknowledged and gave the following clearance: "Cleared for an ILS approach to the airport, Runway 28, wind west 15; cross the outer marker initial (ly) at least 500 on top, report when inbound; ceiling 1.200, visibility nine. altimeter 30.14." Approximately three minutes later, the flight made a report which was acknowledged by the controller as "Air Pacific Easy., Roger, southeast, turning inbound"; the controller then added. "Cheek passing the ILS outer marker inbound." At 0845, a call to the flight was unanswered as were all subsequent calls. Shortly thereafter, appropriate search and rescue agencies were alerted that the flight was overdue. The wreckage was sighted at 1010, approximately seven and one-half miles southeast of the town of Half Moon Bay. All 19 occupants have been killed.
Probable cause:
The Board determines the probable cause of this accident was the failure of the crew to follow prescribed procedures for an instrument approach. The following findings were reported:
- The clearance given the flight for its instrument approach to San Francisco Airport was proper. was acknowledged. and was read back correctly,
- The radio navigational and landing facilities for this area were functioning normally at the time the approach was being made,
- The accident location was in a mountainous area seven and one-half miles southeast of Half Moon Bay at an elevation of 1,950 feet MSL,
- The weather conditions in the area precluded an approach by means of visual reference to the ground,
- The time element involved would not have permitted the aircraft to have flown from Half Moon Bay Fan Marker to the ILS outer marker and then execute the CAA approved instrument approach procedure,
- The undestroyed wreckage yielded no evidence of mechanical or structural failure of the aircraft prior to impact.
Final Report:

Crash of a Douglas R6D-1 in Hamilton

Date & Time: Sep 6, 1953
Type of aircraft:
Operator:
Registration:
131583
Flight Type:
Survivors:
Yes
MSN:
43686
YOM:
1953
Country:
Crew on board:
3
Crew fatalities:
Pax on board:
47
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
The crew was performing a flight from England to Florida with an intermediate stop at Hamilton-Kindley Field Airport, Bermuda. On final approach, the four engine aircraft was too low, hit the ground short of runway threshold and came to rest in flames. All 50 occupants were evacuated safely while the aircraft was destroyed by fire.

Crash of a Douglas R6D-1 in Westover AFB: 4 killed

Date & Time: Aug 12, 1953
Type of aircraft:
Operator:
Registration:
131586
Flight Phase:
Flight Type:
Survivors:
No
Schedule:
Westover - Westover
MSN:
43689
YOM:
1953
Crew on board:
4
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
4
Circumstances:
Shortly after takeoff from Westover AFB, while climbing to a height of 200 feet, the aircraft banked left and crashed in a huge explosion, killing all four crew members.

Crash of a Douglas DC-6A into the Pacific Ocean: 58 killed

Date & Time: Jul 12, 1953 at 0841 LT
Type of aircraft:
Operator:
Registration:
N90806
Flight Phase:
Survivors:
No
Schedule:
Hanoi – Manila – Agana – Wake – Honolulu – Oakland
MSN:
42901
YOM:
1949
Flight number:
TL512
Country:
Region:
Crew on board:
9
Crew fatalities:
Pax on board:
49
Pax fatalities:
Other fatalities:
Total fatalities:
58
Captain / Total flying hours:
10312
Captain / Total hours on type:
729.00
Copilot / Total flying hours:
5699
Copilot / Total hours on type:
434
Aircraft flight hours:
6235
Circumstances:
Transocean Air Lines' Flight 512 departed Guam. M. I., at 0004 on July 12, 1953, for Oakland, California, with planned intermediate stops at Wake Island and Honolulu, T. H. The crew consisted of Captain W. L. Word, First Officer H. A. Hudson, Second Officer L. H. Nowell, Navigator J. R. Hay, Flight Engineer G. C. Haaskamp, Student Flight Engineer P. Yedwabnick, flight Purser H. H. Sargent and Stewardess N. L. Downing. Forty-nine passengers were on board including one infant. The flight to Wake Island was accomplished without incident in five hours and 35 minutes. One passenger boarded the aircraft at Wake Island and since none were discharged at this point, there was a total of 50 passengers on board for the Wake Island-Honolulu segment of the flight. Following a briefing by the U. S. Weather Bureau personnel on the expected en route weather conditions, the crew filed an IFR flight plan. This plan indicated that a rhumb-line course to Honolulu was to be flown at a cruising altitude of 15,000 feet at an air speed of 236 miles per hour. Also that the estimated elapsed time was nine hours and three minutes with 11 hours and 15 minutes of fuel on board. Prior to departure the aircraft was serviced with 2,503 gallons of 100/130 octane gasoline (to a total of 4,069 gallons) and 32 gallons of oil. Takeoff from Wake Island was at 0658, July 12, 1953, with the same crew on board. According to the company's records, the total gross weight of the aircraft at takeoff was 94,397 pounds which was within the allowable gross takeoff weight of 100,000 pounds; the load was properly distributed relative to the approved CG limits. Seven minutes after departure, Flight 512 was cleared from the Wake Island CAA Control Tower frequency. At 0729 the flight made the required 100-mile-east position report and stated that it had reached cruising altitude two minutes earlier. At 0829, one hour and 31 minutes after departing Wake Island, the flight made a scheduled position report as 19 degree 48’ north latitude, 171 degree 48’ east longitude, and cruising at 15,000 feet between cloud layers. This was the last known radio contact with the flight. Since the flight did not report over its next scheduled reporting point, an alert was declared by Wake Island ARTC (Air Route Traffic Control) at 1001. An aircraft flying from Honolulu to Wake Island reported at 1212 that a green flare had been seen. This aircraft's position was 19 degree 23’N and 172 degree 05’E at the time the flare was sighted. The U. S. Coast Guard immediately dispatched several aircraft and a surface vessel to search the area. A Preliminary Accident Notice was filed by Wake Island ARTC at 1643, July 12, 1953.
Probable cause:
The Board is unable to determine the probable cause of this accident from the available evidence.
Final Report:

Crash of a Douglas DC-6B off Oakland: 8 killed

Date & Time: Apr 20, 1953 at 2308 LT
Type of aircraft:
Operator:
Registration:
N91303
Survivors:
Yes
Schedule:
Los Angeles – San Francisco – Oakland
MSN:
43823
YOM:
1952
Flight number:
WA636
Crew on board:
5
Crew fatalities:
Pax on board:
5
Pax fatalities:
Other fatalities:
Total fatalities:
8
Captain / Total flying hours:
11500
Captain / Total hours on type:
79.00
Copilot / Total flying hours:
3100
Copilot / Total hours on type:
38
Aircraft flight hours:
826
Circumstances:
The four engine aircraft left San Francisco Airport at 2305LT on a VFR flight to Oakland, distant of 10 miles. At this time, weather conditions were considered as good. On approach to Oakland runway 27R, the pilot-in-command descended below the minimum safe altitude of 500 feet when the aircraft hit the water, exploded and sank into the Bay of Oakland. A stewardess and a passenger were rescued while eight other occupants were killed.
Probable cause:
The Board determines that the probable cause of this accident was the pilot’s action in continuing descent below the 500-feet prescribed minimum altitude until the aircraft struck the water. A probable contributing factor to the aircraft striking the water was the sensory illusion experienced by the pilots. The following findings were pointed out:
- The reported weather conditions at San Francisco and Oakland at the time of departure were above the prescribed minima,
- Actual weather conditions over the Bay at the time and place of the accident were later determined to be below the prescribed minima for trans-bay clearance,
- The pilot of the aircraft failed to comply with the instructions provided in the Visual Trans-Bay procedures which are to be followed in case ceiling and/or visibility below prescribed minima are encountered en route,
- No evidence was found of mechanical malfunction of the aircraft or any of its components recovered,
- The flight descended below minimum specified altitude in an attempt to maintain visual reference.
Final Report: