ASN Wikibase Occurrence # 352321
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| Date: | Wednesday 1 December 1999 |
| Time: | 12:05 LT |
| Type: | Taylorcraft F-21 |
| Owner/operator: | Private |
| Registration: | N2005J |
| MSN: | 1014 |
| Total airframe hrs: | 883 hours |
| Engine model: | Lycoming O-235-L2C |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Houlton, WI -
 United States of America
|
| Phase: | Landing |
| Nature: | Private |
| Departure airport: | Lake Elmo, MI (21D) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported, 'The engine developed a bad noise and vibration so I turned it off and looked for a place to land.' He landed in a farm field and the landing gear collapsed during rollout. The inspection of the engine revealed the #1 connecting rod was detached from the crankshaft and the connecting rod cap was missing. One rod cap bolt was intact although bent, and no nut was found on the bolt. The other rod cap bolt was broken with the nut portion missing. The #1 cylinder crankshaft journal was inspected. No discoloring, significant scoring, or other damage was noted. The rod bolts and nuts for cylinders 2, 3, and 4 were inspected for proper installation and torque. All nuts appeared to be properly installed. The nuts were torque checked at 40 lbs. No nuts moved at this torque setting. The overhauled engine had been installed on the airplane on July 15, 1998. The airplane had been flown approximately 50 hours since the major overhaul.
Probable Cause: the mechanic failed to torque the rod cap bolt during the major engine overhaul. Factors relating to the accident included the rough field and the collapsed landing gear.
Accident investigation:
 |
|
Sources:
NTSB CHI00LA034
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 07-Mar-2024 10:37 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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