ASN Wikibase Occurrence # 375441
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: | Monday 17 March 1986 |
| Time: | 20:47 LT |
| Type: |  Piper PA-28R-180 |
| Owner/operator: | Private |
| Registration: | N7613J |
| MSN: | 28R-31005 |
| Total airframe hrs: | 5350 hours |
| Engine model: | LYCOMING IO-360-B1E |
| Fatalities: | Fatalities: 0 / Occupants: 4 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Crossville, TN -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Albany, GA (KABY) |
| Lexington, KY (KLEX) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
ON TAKEOFF THE PLT SAW AN OIL LEAK AROUND THE PROP HUB. THE ACFT WAS RETURNED TO THE AIRPORT AND THE PROP GOVERNOR OIL TUBE FITTING WAS FOUND TO BE CRACKED. THE PART WAS REPLACED AND THE FLT WAS CONTINUED. THE PART WAS CHECKED DURING A LATER REFUELING STOP AND WAS NOT FOUND TO BE LEAKING. DURING CRUISE IN MOUNTAINOUS TERRAIN AN OIL LEAK WAS AGAIN SEEN. VECTORS WERE RECEIVED TO A NEARBY ARPT. THE ENG QUIT AND THE PLT ATTEMPTED AN EMERGENCY LANDING DURING WHICH THE ACFT STRUCK A TREE. EXAMINATION OF THE ENG SHOWED THAT THE OIL LINE FITTING HAD AGAIN CRACKED. BOTH FITTINGS WERE FOUND BY METALLURGICAL EXAMINATION TO HAVE FAILED DUE TO A LOW STRESS HIGH CYCLE FATIGUE INDUCED BY A HIGH MEAN TENSILE STRESS. THE OIL LINE WAS FOUND TO BE UNRESTRAINED ALTHOUGH THE SERVICE MANUAL CALLS FOR TWO CLAMPS. THE RESULTING VIBRATION INDUCED THE STRESS LOADS AS SEEN ON THE TWO FITTINGS.
Probable Cause:
Accident investigation:
 |
|
Sources:
NTSB ATL86LA099
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 28-Mar-2024 19:57 | 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