ASN Wikibase Occurrence # 145639
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 12 May 2012 |
| Time: | 12:45 |
| Type: |  Beechcraft A36TC Bonanza |
| Owner/operator: | L & M Trucking |
| Registration: | N2WZ |
| MSN: | EA-174 |
| Year of manufacture: | 1980 |
| Total airframe hrs: | 5158 hours |
| Engine model: | Continental. TSIO-520 |
| Fatalities: | Fatalities: 0 / Occupants: 6 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Harnett Regional Jetport Airport - KHRJ, Erwin, NC -
 United States of America
|
| Phase: | Take off |
| Nature: | Private |
| Departure airport: | Erwin, NC (HRJ) |
| Darlington, SC (UDG) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
After what he described as an uneventful engine run-up, the pilot took off from the 5,000-foot-long runway. The pilot stated that when the airplane reached an altitude of about 50 feet, he retracted the landing gear; the engine lost partial power. The airplane yawed to the left and touched down again, impacting a thicket. According to a witness who observed the takeoff, the engine power never decreased until the engine stopped suddenly upon impacting the ground.
Postaccident examination of the engine revealed that the No. 4 cylinder exhaust valve springs had fractured in fatigue. Detailed examination of the springs showed that the fatigue cracking likely originated from one or more of the iron oxide (rust) pits present on the surface of the springs. The springs had been installed in the engine about 1 year before the accident flight. According to the mechanic who installed the springs, he had retrieved them from a similar engine’s cylinder that was removed from another airplane; there was no documentation of the springs’ service history or serviceability.
Probable Cause: The partial loss of engine power shortly after takeoff due to fatigue-fractured exhaust valve springs. Contributing to the accident was the mechanic’s decision to install exhaust valve springs with an unknown service history in the engine’s No. 4 cylinder.
Accident investigation:
 |
|
Sources:
NTSB
History of this aircraft
Other occurrences involving this aircraft
| 7 February 1981 | N2WZ | Private | 0 | Scotts Valey Airport, California (SKYPARK) | |
w/o |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 15-May-2012 10:24 | Geno | Added |
| 21-Dec-2016 19:28 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 27-Nov-2017 20:40 | ASN Update Bot | Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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