Crash of a Piper PA-31-350 Navajo Chieftain in Whitianga: 2 killed

Date & Time: Sep 2, 1974
Registration:
N54357
Flight Phase:
Flight Type:
Survivors:
No
Schedule:
Whitianga - Auckland
MSN:
31-7405248
YOM:
1974
Country:
Region:
Crew on board:
1
Crew fatalities:
Pax on board:
1
Pax fatalities:
Other fatalities:
Total fatalities:
2
Circumstances:
Shortly after takeoff from Whitianga Aerodrome, while in initial climb, the twin engine airplane went out of control, stalled and crashed near the Whitianga beach. The aircraft was destroyed and both occupants were killed. They were completing a delivery flight to Auckland when the accident occurred.
Probable cause:
The pilot was unable to cope with an in-flight emergency initiated by a power plant malfunction and compounded by poor weather conditions, as a consequence of which the aircraft stalled and the pilot lost control at too low an altitude to effect recovery. Autopsy of the pilot revealed acute interstitial myocarditis conducive toward destruction of the cardiac muscle fibers. It is a silent disease prone to cause irregularities in cardiac rhythm, fainting, and occasionally sudden death. The possibility that the pilot had become physically incapacitated to some degree could not be entirely discounted.

Crash of a Fletcher FU-24 in Pukekohe: 1 killed

Date & Time: Mar 25, 1974 at 0802 LT
Type of aircraft:
Operator:
Registration:
ZK-BVB
Flight Phase:
Survivors:
No
MSN:
67
YOM:
1957
Country:
Region:
Crew on board:
1
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
1
Circumstances:
The pilot had flown from the farm earlier in the morning before going away for about two hours and then returning. At about 08:00 the property owner saw the plane approaching and making a low run over the airstrip apparently in order to frighten away some cattle obstructing the landing area.. The owner, a pilot himself, had experienced a similar situation before and went move the stock out of the way. He had lost sight of the aircraft for a brief period when he heard a bang and then the plane came back into view, rolling to starboard until inverted, and diving vertically into a hillside and exploding. Ground evidence showed that the Fletcher had struck with its right wing tip a 400 pound ( 180 kg ) cattle beast, killing the animal and dislodging the metal wing tip fairing which was found nearby with its leading edge crushed. Starting a few metres further on a 46 metres long scrape mark was visible on the surface having been made by the exposed end of the outer wing. The aircraft then collided with the corner of a hangar, the outboard end of the right wing contacting the building about 2.5 metres above ground level and 1 metre below the top. This impact caused the separation of the right outer wing panel. The plane, now out of control, cleared the top of another hangar and adjacent tall trees before diving into a hillside, exploding in flames and breaking up as it tumbled down the slope. The aircraft was destroyed and the pilot was killed.
Probable cause:
The investigator found that control was lost with the separation of the outer wing wing panel on impact with the hangar. Aileron control had survived the collision with the animal. Factors that may have contributed to the accident were the altitude and azimuth of the morning sun which may have dazzled the pilot and the possibility that the aircraft was affected by its own wake turbulence created by the first low run down the airstrip.

Crash of a Fletcher FU-24 in Orakei

Date & Time: Oct 29, 1973
Type of aircraft:
Operator:
Registration:
ZK-CDW
Flight Phase:
Survivors:
Yes
Schedule:
Auckland - Auckland
MSN:
90
YOM:
1962
Country:
Region:
Crew on board:
1
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
Crashed in unknown circumstances in Orakei, in the suburb of Auckland, while engaged in a spraying mission.

Crash of a Fletcher FU-24-950M near Lake Rotomahana

Date & Time: Mar 29, 1973 at 1630 LT
Type of aircraft:
Operator:
Registration:
ZK-CKJ
Flight Phase:
Survivors:
Yes
MSN:
104
YOM:
1964
Country:
Region:
Crew on board:
1
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
Following a power loss the pilot attempted a forced landing on a relatively level hilltop, but during the roll the nosewheel entered a deep depression and was forced rearward and upward into the cockpit floor. Fire broke out in the engine bay immediately thereafter and flashed back into the cockpit as the pilot opened the canopy to escape. The pilot evacuated safely while the aircraft was written off.
Probable cause:
Engine failure and fire for undetermined reason.

Crash of a Douglas DC-3F in Seddon: 1 killed

Date & Time: Feb 23, 1973 at 1555 LT
Type of aircraft:
Operator:
Registration:
ZK-AOI
Flight Phase:
Survivors:
No
Schedule:
Blenheim - Blenheim
MSN:
16966/34226
YOM:
1945
Country:
Region:
Crew on board:
1
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
1
Aircraft flight hours:
24261
Circumstances:
While completing a crop spraying flight, the pilot lost control of the airplane after the right wing detached in flight. The aircraft crashed in an open field and was destroyed. The pilot, sole on board, was killed.
Probable cause:
The accident was caused by in-flight separation of the starboard wing due to a loss of structural strength brought about by extensive fatigue cracks in the lower centre wing wraparound and internal doublers inboard of Sta. 142, initiation and propagation to failure of the RH wing cracks being due to consistent overstress.

Crash of a Fletcher FU-24-950M near Lake Waihola: 1 killed

Date & Time: Feb 16, 1973
Type of aircraft:
Operator:
Registration:
ZK-BXT
Flight Phase:
Survivors:
No
MSN:
74
YOM:
1961
Country:
Region:
Crew on board:
1
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
1
Circumstances:
Crashed in unknown circumstances near Lake Waihola while on a crop spraying mission. The pilot, sole on board, was killed.

Crash of a Fletcher FU-24 in Piako: 1 killed

Date & Time: Feb 6, 1973 at 1200 LT
Type of aircraft:
Operator:
Registration:
ZK-BIH
Flight Phase:
Survivors:
No
Schedule:
Piako - Piako
MSN:
35
YOM:
1957
Country:
Region:
Crew on board:
1
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
1
Circumstances:
The pilot was engaged in a superphosphate spreading operation over hilly farmland. Just before noon he took off on his 72nd sortie of the day with the usual load of 14 hundredweight in the hopper. On the completion of the first sowing run the aircraft was turned to position it for the next run. As usual this put the plane out of sight to those on the airstrip as it passed behind an intervening spur. At about the time the plane was expected to reappear a loud bang was heard by the crew on the strip, and moments later a column of smoke was seen rising from behind the spur. The aircraft was found wrecked and burning. This was not a survivable crash. Physical evidence at the site showed that the Fletcher had struck the ground with its right wingtip first while banked past the vertical with the fuselage then impacting in a perpendicular attitude. Propeller score marks on the pasture indicated that the engine was developing power at the moment of the crash. The weather was fine and clear with a southwesterly breeze of about 5 knots. Not a cause factor in the accident. The pilot had recently completed an agricultural pilot course and had almost accumulated the fifty hours of supervised productive flying required before being cleared for unsupervised operations.
Probable cause:
No evidence of mechanical or structural failure was found. Weather conditions were considered as good. The crash investigation found that the most probable cause of the tragedy was a catastrophic physical incapacity of the pilot causing him to lose control of the aircraft.

Crash of a De Havilland DHC-2 Beaver in Te Karaka: 1 killed

Date & Time: Dec 6, 1972 at 1455 LT
Type of aircraft:
Operator:
Registration:
ZK-CZO
Flight Phase:
Flight Type:
Survivors:
No
Schedule:
Te Karaka - Gisborne
MSN:
1533
YOM:
1963
Country:
Region:
Crew on board:
1
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
1
Captain / Total flying hours:
20000
Circumstances:
After completing a topdressing mission in the Te Karaka area, the pilot was flying back to his base in Gisborne. En route, the single engine airplane turn steeply to the right then entered a dive and crashed by a wooded area. The aircraft was totally destroyed and the pilot, sole on board, was killed.
Probable cause:
An examination of the wreck revealed nothing that could have caused the pilot Alex Williams to lose control of the aircraft. It was concluded that the pilot had been suddenly incapacitated while in flight. A post mortem examination showed three separate medical conditions, which had they been known about by the Civil Aviation medical authorities, could have resulted in the pilot being assessed as unfit for flying duties.

Crash of a Fletcher FU-24 II in Clayton Station: 1 killed

Date & Time: Aug 30, 1972 at 1750 LT
Type of aircraft:
Operator:
Registration:
ZK-CFQ
Flight Phase:
Survivors:
No
MSN:
98
YOM:
1963
Country:
Region:
Crew on board:
1
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
1
Circumstances:
Late in the afternoon of 30/8/72 two aircraft were conducting an aerial topdressing operation at Clayton Station. One of the pilots observed the other aircraft operating normally. When he looked again moments later he saw smoke and flames on the side of a ridge in the working area. Realizing that there had been an accident he immediately flew back to the airstrip and raised the alarm. ZK-CFQ had struck the ground with its port wingtip while making a 180 degree RH turn within the confines of a valley. Physical evidence showed that the plane was banked at an angle of 68 degrees when the wingtip touched the slope. The aircraft was destroyed by impact forces and fuel from a ruptured tank ignited completing the destruction. Evidence also showed that the engine was producing high power at the moment of impact. The all-up weight and C of G were found to be well within the permitted limits. The other pilot reported seeing an interruption in the flow of fertilizer in the final sowing run, but there was no sign of a blockage in the hopper outlet. The hopper was empty. The weather was perfect for aerial topdressing, CAVU and still air. An autopsy revealed that the 34-year-old pilot had received no fatal injuries in the impact, but there was evidence of coronary occlusion due to arteriosclerosis heart disease. It was concluded that the pilot had died from a heart attack and traumatic hypoxia. It was not clear if the heart attack occurred before or at the time of impact. It would appear however, from the steep angle of bank so close to the ground, that pilot had become incapacitated and had lost control of his aircraft.
Source: ASN
Probable cause:
Loss of control at low height for undetermined reason.

Crash of a Lockheed 18-56 LodeStar off Napier

Date & Time: Apr 24, 1971
Type of aircraft:
Operator:
Registration:
ZK-CGV
Flight Type:
Survivors:
Yes
MSN:
2051
YOM:
1940
Country:
Region:
Crew on board:
1
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
While on approach to Napier-Hawke’s Bay Airport, the airplane went out of control and crashed into the Napier harbor. The pilot was rescued by fishermen while the airplane sank and was lost.
Probable cause:
Loss of control on approach after a flap control cable broke on the right wing, causing a flap to extend unexpectedly.