ASN Wikibase Occurrence # 219458
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information.
If you feel this information is incomplete or incorrect, you can submit corrected information.
| Date: | Friday 20 January 1989 |
| Time: | 07:40 |
| Type: |  Christen Eagle |
| Owner/operator: | |
| Registration: | VH-BOO |
| MSN: | |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Location: | 4km S of Jandakot, Perth, WA -
 Australia
|
| Phase: | Landing |
| Nature: | Private |
| Departure airport: | YPJT |
| YPJT | |
| Investigating agency: | BASI |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot was carrying out a series of aerobatic manoeuvres when the propeller separated from the airframe. A forced landing was carried out in a suitable paddock. The pilot then noted that one wing had sustained damage from the departing propeller. The evidence available indicates that the propeller fell from the aircraft when the remaining five of the six propeller retaining bolts failed as a result of fatigue cracking and overload. The sixth bolt was not found but lack of marks on the crankshaft flange indicate that it had fallen out prior to failure of the other five bolts. All bolts were in place and secured with lock wire prior to take off. CAA Airworthiness Directive AD/PEP/1 AMDT 2 addresses a known problem which relates to propeller wood shrinkage and loosening of the retaining bolts. The directive recommends special checks on the propeller bolt torque in certain circumstances. The propeller was fitted to the aircraft in Victoria, in a cool moist environment, and the aircraft was then transferred to Perth and operated in a warm dry environment. This change in environment is one of the circumstances set out in the airworthiness directive. No evidence was found to indicate recent compliance with the directive. It is probable that shrinkage of the propeller wood caused loosening of the propeller retaining bolts. The loose bolts were than able to "work" eventually resulting in the failure of the lock wire and loss of one bolt and the failure of the other five bolts.
Accident investigation:
 |
|
Sources:
https://www.atsb.gov.au/publications/investigation_reports/1989/aair/aair198900230/
https://www.atsb.gov.au/media/33771/aair198900230.pdf
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 14-Dec-2018 13:01 | Pineapple | Added |
| 07-Jun-2022 21:47 | Ron Averes | Updated [Location] |
Corrections or additions? ... Edit this accident description
The Aviation Safety Network is an exclusive service provided by:
Quick Links:
| ASN Home | Send Correction / Feedback |
| FSF Home | Disclaimer | Copyright |
| Contact Us | Privacy Policy |
| Press / Media |
CONNECT WITH US:
©2024 Flight Safety Foundation