ASN Wikibase Occurrence # 291756
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| Date: | Sunday 1 October 2006 |
| Time: | 17:00 LT |
| Type: |  Cessna 340A |
| Owner/operator: | Private |
| Registration: | N1920E |
| MSN: | 340A0669 |
| Total airframe hrs: | 6648 hours |
| Engine model: | Continental TSIO-520 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Kalispell, Montana -
 United States of America
|
| Phase: | Unknown |
| Nature: | Training |
| Departure airport: | Kalispell-Glacier Park International Airport, MT (FCA/KGPI) |
| Kalispell-Glacier Park International Airport, MT (FCA/KGPI) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
While extending the landing gear the pilot heard a "loud bang" in the nose of the airplane. With both main landing gear having extended normally and the nose gear failing to extend, the pilot carried out the emergency landing gear checklist, but was unable to get the nose gear to extend. Air traffic control tower personnel subsequently confimred that the nose landing gear had not extended after the pilot did two flybys. The pilot then landed the airplane on both main landing gear, letting the aircraft settle onto its nose as airspeed bleed off, and it came to rest approximately 2,000 feet down the runway. A post-accident examination revealed that the adjusting bellcrank was fractured at the upper end where the fork bolt is normally inserted. The fracture features were consistent with overstress, and there was no evidence of any preexisting damage. The deformation and fractures appeared consistent with the bellcrank rotating relative to a stationary fork bolt during nose gear extension, such as could occur as a result of some obstruction or binding in the linkage forward of the bellcrank. The nature and cause of the binding in the linkages could not be determined.
Probable Cause: The fracture of the adjusting bellcrank in overstress due to binding in a linkage forward of the bell crank.
Accident investigation:
 |
|
Sources:
NTSB SEA07LA002
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 07-Oct-2022 18:32 | ASN Update Bot | Added |
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