ASN Wikibase Occurrence # 334418
| Date: | Friday 30 August 1957 |
| Time: | 10:08 |
| Type: |  Scottish Aviation Twin Pioneer 1 |
| Owner/operator: | Kroonduif |
| Registration: | JZ-PPX |
| MSN: | 509 |
| Year of manufacture: | 1957 |
| Engine model: | Alvis Leonides 514 |
| Fatalities: | Fatalities: 2 / Occupants: 2 |
| Aircraft damage: | Destroyed, written off |
| Category: | Accident |
| Location: | 13 km off Japen Island -
 Papua New Guinea
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Training |
| Departure airport: | Biak-Mokmer Airport (BIK/WABB) |
| Biak-Mokmer Airport (BIK/WABB) |
Twin Pioneer JZ-PPX took off from Mokmer at 09:30 for a local training flight. Takeoffs and landings were practiced and after some time the captain requested and received permission to carry out manoeuvres outside the circuit. During one of these manoeuvres, a right-hand turn, the right wing broke off. The aircraft lost control and spiralled down into the sea. The wreckage stayed afloat for a while and sank.
PROBABLE CAUSE: "The Commission is of the opinion that, on the ground of the available evidence of the accident with the Twin Pioneer G-AOEO, the accident with the JZ-PPX has to be put down with to certainty nearing probability to the failure of the V-brace strut due to fatigue, because both aeroplanes were equipped with the same type of liftstrut and V-brace construction and because both aeroplanes were used in the same manner. The JZ-PPX carried out many instruction flights at a low altitude, many take-offs and landings, many manoeuvres with high flight loads, possibly up to the maximum loads. The G-AOEO also carried out many demonstration flights at a low altitude with man take-offs and landings, many manoeuvres, also with possibly maximum loads. The term of life of the V-brace as declared by the manufacturer, was based on conditions of flight which are not in agreement with the reality. During a meeting at September 6, 1957, Mr MacCallum of Scottish Aviation Ltd. gave a value of 4000hrs which raised a discussion. The Commission is aware of the fact that he cannot give a positive opinion upon the cause of the accident because there are no silent witnesses present, but nevertheless is of the opinion that there is a close conformity with the accident of the G-AOEO."
Sources:
NRC Handelsblad Overzeese Weekeditie xx.09.1958 (p.11)
Location
Revision history:
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