ASN Wikibase Occurrence # 287582
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| Date: | Saturday 14 July 2012 |
| Time: | 14:15 LT |
| Type: |  Piper PA-18-150 |
| Owner/operator: | Tyler Renner |
| Registration: | N7154Z |
| MSN: | 18-8268 |
| Year of manufacture: | 1965 |
| Total airframe hrs: | 9336 hours |
| Engine model: | Lycoming IO 360 SER |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Kenai, Alaska -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Private |
| Departure airport: | Kenai, AK |
| Anchorage, AK | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot, with one passenger aboard, departed in a float-equipped airplane from a remote lake. Shortly after takeoff, about 100 feet above the water, the airplane's engine began to vibrate violently. The pilot reduced engine power, turned the airplane left to avoid trees at the departure end of the lake, and attempted an emergency landing on the lake. The airplane continued to descend, and it subsequently collided with a shallow portion of the lake, sustaining substantial damage to the wings, fuselage, and empennage. A postaccident examination revealed that a 6-inch portion of one propeller blade separated, resulting in a severe imbalance.
An NTSB metallurgical examination of the fractured propeller blade revealed evidence of an unauthorized and undocumented repair of a nearly cylindrical hole, measuring about 0.3 inch in diameter. The examination also revealed areas where a white, opaque, plastic-like filler material, consistent with automotive body repair filler, was used to cover the hole before it was painted over, which subsequently made the unauthorized repair undetectable.
The airplane owner reported that the propeller was already installed when he recently purchased the airplane. In addition, no logbook entry was found that would have indicated any damage, repairs, modifications, or a propeller assembly installation.
Probable Cause: The in-flight separation of a propeller tip due to an unauthorized and undocumented propeller repair.
Accident investigation:
 |
|
Sources:
NTSB ANC12LA075
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 04-Oct-2022 12:18 | ASN Update Bot | Added |
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