ASN Wikibase Occurrence # 293195
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: | Saturday 13 August 2005 |
| Time: | 10:30 LT |
| Type: |  Piper PA-24-250 |
| Owner/operator: | Christopher James Trust |
| Registration: | N6677P |
| MSN: | 24-1801 |
| Year of manufacture: | 1960 |
| Total airframe hrs: | 4571 hours |
| Engine model: | Lycoming O-540 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Challis, Idaho -
 United States of America
|
| Phase: | Unknown |
| Nature: | Private |
| Departure airport: | Challis Airport, ID (CHL/KLLJ) |
| MACKAY, ID (U62) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that shortly after takeoff, the propeller RPM became erratic and uncontrollable and he elected to return to the airport. He reported that during the descent, the airplane developed a rough running engine and eventually lost power resulting in an off airport landing. Preliminary external examination of the assembly revealed a large hole in the engines crankcase, adjacent to the number four cylinder assembly. The number four piston rod was fractured and extensive heat distress, deformation and discoloration was noted to both the number three and number four piston assemblies. A representative from Textron Lycoming reported that this type of damage is indicative of oil depravation. Further examination of the engine assembly revealed that the hydraulic pump adapter pad cover gasket was protruding from between the accessory mounting pad and its associated cover. A section of the gasket separated and was displaced from its installed position. The FAA Airworthiness Inspector overseeing the examination reported that the installed gasket was intended to be used in conjunction with a hydraulic pump, if applicable, however, this particular engine configuration does not utilize a hydraulic pump, and therefore a hydraulic pump adapter pad gasket should have been installed. Personnel at the Challis airport reported that a large puddle of oil was found in the run-up area following the airplane's pre takeoff run-up and departure.
Probable Cause: The installation of an improper oil gasket by maintenance personnel, which resulted in a loss of engine oil and subsequent loss of engine power during the emergency descent.
Accident investigation:
 |
|
Sources:
NTSB SEA05LA170
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 09-Oct-2022 17:12 | ASN Update Bot | Added |
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