ASN Wikibase Occurrence # 215851
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| Date: | Thursday 29 May 1986 |
| Time: | |
| Type: |  Piper PA-23-250 Aztec |
| Owner/operator: | |
| Registration: | VH-MBU |
| MSN: | |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Location: | Essendon Airport, Melbourne, VIC -
 Australia
|
| Phase: | Standing |
| Nature: | Training |
| Departure airport: | YMEN |
| YMEN | |
| Investigating agency: | BASI |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot was carrying out a pre-flight inspection of the aircraft in preparation for an Instrument Rating flight test. He had selected the flaps down, and began operating the hydraulic hand pump to extend the flaps. After a few pump cycles, the right main gear collapsed and the pilot then noted that the gear selector was in the up position. It was suspected that the anti-retraction valve, which is designed to prevent gear retraction on the ground, was unserviceable. However, no fault was discovered. Tests determined that the gear could be unlocked if the hand pump was operated rapidly, and the pilot advised that he had pumped briskly on this occasion. The check list provided by the aircraft operator did not alert pilots to confirm the position of the gear handle before using the hydraulic hand pump. It was not possible to establish why or by whom the gear selector had been placed in the up position.
Accident investigation:
 |
|
Sources:
https://www.atsb.gov.au/publications/investigation_reports/1986/aair/aair198601420/
https://www.atsb.gov.au/media/28084/aair198601420.pdf
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 30-Sep-2018 11:16 | Pineapple | Added |
| 07-Jun-2022 21:06 | Ron Averes | Updated [Location] |
Corrections or additions? ... Edit this accident description
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