ASN Wikibase Occurrence # 133202
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| Date: | Wednesday 23 March 1994 |
| Time: | 16:30 LT |
| Type: |  Cessna 172M |
| Owner/operator: | Horizon Aviation |
| Registration: | N13620 |
| MSN: | 17262888 |
| Total airframe hrs: | 7015 hours |
| Engine model: | Lycoming O-320-E2D |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Santa Maria, CA -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Santa Barbara, CA |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE AIRCRAFT LOST ENGINE POWER AND COLLIDED WITH TREES IN MOUNTAINOUS TERRAIN. THE PILOT REPORTED THE LOSS OF POWER WAS GRADUAL WITH ENGINE ROUGHNESS. THE PILOT ATTEMPTED TO RESTART THE ENGINE BUT DID NOT MANIPULATE THE MAGNETO SWITCH AS OUTLINED IN THE PILOT OPERATING HANDBOOK AMPLIFIED EMERGENCY PROCEDURES. EXAMINATION OF THE ENGINE MAGNETOS REVEALED THE LEFT MAGNETO INTERNAL TIMING WAS INCORRECT. THE BREAKER POINT CAM AND CAM FOLLOWER WERE FOUND WORN. A SLICK MODEL 4201-R MAGNETO IS NOT AN APPROVED INSTALLATION ON LYCOMING ENGINES. MAINTENANCE RECORDS DID NOT SHOW THAT NEW OR OVERHAULED MAGNETOS WERE INSTALLED AT THE TIME OF THE ENGINE OVERHAUL OR REPLACED AFTER THE ENGINE WAS OVERHAULED. REVIEW OF THE ENGINE LOGBOOK INDICATED THE MAGNETO TIMING WAS ADJUSTED ABOUT 78 FLIGHT HOURS BEFORE THE ACCIDENT AT THE LAST 100-HOUR INSPECTION.
Probable Cause: AN ENGINE FAILURE DUE TO THE IMPROPER INSTALLATION AND SERVICE OF AN INCORRECT MODEL MAGNETO BY MAINTENANCE PERSONNEL, AND THE FAILURE OF THE PILOT-IN-COMMAND TO FOLLOW PUBLISHED AIRPLANE EMERGENCY PROCEDURES.
Accident investigation:
 |
|
Sources:
NTSB LAX94LA173
History of this aircraft
Other occurrences involving this aircraft
| 9 March 1983 | N13620 | Private | 0 | Leadville, CO | |
sub |
| 2 September 1989 | N13620 | Private | 0 | Bellville, TX | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 10-Apr-2024 08:21 | ASN Update Bot | Updated [Time, Other fatalities, Departure airport, Source, Narrative, Category, Accident report] |
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