ASN Wikibase Occurrence # 292604
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 25 February 2006 |
| Time: | 08:45 LT |
| Type: |  Piper PA-28RT-201T |
| Owner/operator: | |
| Registration: | N2939V |
| MSN: | 28R-7931264 |
| Year of manufacture: | 1979 |
| Total airframe hrs: | 3817 hours |
| Engine model: | Teledyne Continental TSIO-360-FB5B |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Parker, Colorado -
 United States of America
|
| Phase: | Unknown |
| Nature: | Private |
| Departure airport: | Denver-Front Range Airport, CO (KFTG) |
| BUENA VISTA, CO (7V1) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot stated that during cruise flight the engine rpm increased to an "over speed condition." When he increased power, he could not keep the rpm under redline and he elected to perform a forced landing. During the landing, the landing gear collapsed resulting in substantial damage. The pilot stated they had been having difficulty obtaining full rpm from the engine. He stated that the propeller governor had been adjusted several times, but full rpm was never obtained. On November 16, 2005, at an engine tachometer time of 1,959.37, the oil and filter were removed and replaced, and an oil sample was sent for analysis. The results from that analysis indicated "excessive wear." Removal of the oil suction screen revealed metal contamination inside and outside the screen. Examination of the propeller governor revealed the adjustment screw had been adjusted beyond its maximum stop. The propeller governor was removed and the screen between the governor and the engine was entirely obstructed with metal contamination. Removal and examination of the oil filter revealed metal contamination. Broken portions of the number two main bearing were found within the oil sump. Breakaway torque values revealed that the number two and number three cylinder throughbolt nuts, at the cylinder flange, were loose at 500 inch/pounds. Further examination revealed metal contamination throughout the engine, including the oil pump and the oil cooler. No other anomalies were noted with the airframe, propeller, or engine.
Probable Cause: the improper maintenance procedures resulting in the unseating of the number two main bearing. Contributing factors include the mechanic's improper troubleshooting procedures, and the pilot's improper decision to continue operating the airplane with known internal excessive engine wear, and engine rpm issues.
Accident investigation:
 |
|
Sources:
NTSB DEN06LA044
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 09-Oct-2022 06:44 | 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