ASN Wikibase Occurrence # 359057
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| Date: | Tuesday 2 May 1995 |
| Time: | 11:36 LT |
| Type: |  Beechcraft C23 |
| Owner/operator: | Donald Eugene Landen |
| Registration: | N6636R |
| MSN: | M1590 |
| Total airframe hrs: | 2223 hours |
| Engine model: | LYCOMING O-360--A4J |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Red Bluff, CA -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Half Moon Bay, CA |
| (KRBL) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PILOT SAID THAT WHEN HE TRIED TO MAKE A THROTTLE ADJUSTMENT IT HAD NO EFFECT ON THE ENGINE RPM. AFTER ENTERING DOWNWIND ABEAM HIS TOUCHDOWN POINT, HE SHUT DOWN THE ENGINE AND ATTEMPTED TO GLIDE THE REMAINDER OF THE DISTANCE. THE AIRCRAFT TOUCHED DOWN SHORT OF THE RUNWAY AND STRUCK AN EMBANKMENT. AN INSPECTION OF THE AIRCRAFT REVEALED THAT THE THROTTLE LINKAGE HAD SEPARATED FROM THE CARBURETOR THROTTLE ARM. THE BOLT, CASTELLATED NUT, AND WASHER WHICH SECURES THE ASSEMBLY TOGETHER WERE NOT PRESENT. THE ENGINE WAS REINSTALLED IN THE AIRCRAFT FOLLOWING A MAJOR OVERHAUL, 1 MONTH AND 2 OPERATING HOURS PRIOR TO THE ACCIDENT. AN ANNUAL INSPECTION WAS ALSO COMPLETED AND SIGNED OFF AT THAT TIME. THE MECHANIC WHO PERFORMED THE ENGINE REINSTALLATION SAID THAT THE BOLT HAD BEEN REINSTALLED AND THAT A COTTER PIN HAD ALSO BEEN INSTALLED IN THE PROCESS. THE MECHANIC WHO PERFORMED THE ANNUAL INSPECTION REPORTED THAT HE HAD NOT LOOKED THAT CLOSELY AT THE ENGINE SINCE IT HAD JUST BEEN INSTALLED AND INSPECTED BY ANOTHER MECHANIC. THE MANUFACTURER REPORTED THAT THE DESIGN OF THE ASSEMBLY DOES NOT PLACE LOADS ON THE BOLT THAT WOULD BE SUFFICIENT TO PRODUCE AN OVERLOAD FAILURE.
Probable Cause: the separation of the throttle linkage due to improper installation, and the pilot's misjudgement of the glide path necessary to reach the runway prior to shutting down the engine.
Accident investigation:
 |
|
Sources:
NTSB LAX95LA177
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 15-Mar-2024 06:33 | ASN Update Bot | Added |
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