ASN Wikibase Occurrence # 132180
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| Date: | Monday 15 November 1993 |
| Time: | 14:15 LT |
| Type: |  Cessna 172N |
| Owner/operator: | Northern Colorado Air Charter |
| Registration: | N4829E |
| MSN: | 17271668 |
| Total airframe hrs: | 4149 hours |
| Engine model: | Lycoming O-320-H2AD |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Fort Collins, CO -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Training |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE STUDENT PILOT MADE A FORCED LANDING AFTER A TOTAL POWER LOSS SHORTLY AFTER TAKEOFF. ENGINE EXAMINATION REVEALED THE COTTER PIN THAT FITTED INTO THE LOCKING NUT ON THE THROTTLE LEVER WAS MISSING. THE THROTTLE LEVER SERRATED SURFACES WERE NOT MESHED AND WERE RIDING ON TOP OF EACH OTHER. THE THROTTLE VALVE WAS CLOSED BECAUSE THE THROTTLE OPENING SPRING, DESIGNED TO FULLY OPEN THE THROTTLE IN CASE OF THROTTLE LEVER OR CABLE SEPARATION, WAS BROKEN. THREE DAYS BEFORE THE ACCIDENT, THE THROTTLE SHAFT WAS REMOVED AND INSPECTED FOR WEAR. THE MECHANIC SAID HE WAS 'ALMOST SURE' HE INSERTED THE COTTER PIN WHEN HE REINSTALLED THE CARBURETOR. THIS WAS THE FIRST FLIGHT AFTER THE MAINTENANCE WAS PERFORMED.
Probable Cause: POWER LOSS DUE TO THROTTLE LINKAGE DISCONNECT. FACTORS WERE MISSING COTTER KEY, IMPROPER MAINTENANCE, AND THE LACK OF SUITABLE TERRAIN FOR THE FORCED LANDING.
Accident investigation:
 |
|
Sources:
NTSB FTW94FA034
History of this aircraft
Other occurrences involving this aircraft
| 10 June 1993 | N4829E | Northern Colorado Air Charter | 0 | Livermore, CO | |
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 10:06 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Phase, Source, Narrative, Category, Accident report] |
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