ASN Wikibase Occurrence # 133074
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| Date: | Friday 1 September 1995 |
| Time: | 07:37 LT |
| Type: |  Cessna 172N |
| Owner/operator: | Falcon Rentals |
| Registration: | N4814F |
| MSN: | 17273085 |
| Total airframe hrs: | 8595 hours |
| Engine model: | Lycoming O-320-H2AD |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Colorado Spgs, CO -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Private |
| Departure airport: | (KCOS) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
WITNESSES REPORTED THAT THE AIRPLANE DID NOT APPEAR TO BE CLIMBING NORMALLY AFTER TAKEOFF. THE PILOT RECALLED TURNING 'BACK TOWARDS THE RUNWAY.' THE PILOT-RATED PASSENGER RECALLED THERE HAD BEEN A POWER LOSS 'AS IF THE POWER HAD BEEN BROUGHT BACK TO IDLE.' SUBSEQUENTLY, THE LEFT WING DROPPED, AND THE AIRPLANE COLLIDED WITH TERRAIN. THE MIXTURE CONTROL WAS FOUND IN THE FULL RICH POSITION. A 4 INCH BY 3/8 INCH PIECE OF BAFFLE SEAL MATERIAL WAS FOUND NEXT TO THE VENTURI IN THE AIR INTAKE SIDE OF THE CARBURETOR THROAT, LODGED BETWEEN THE ACCELERATOR PUMP DISCHARGE TUBE AND THE POWER JET. THE UNDISTURBED CARBURETOR WAS FACTORY TESTED ON A SIMILAR ENGINE. THE ENGINE OPERATED 'EXTREMELY RICH.' ONE PILOT WHO HAD PREVIOUSLY FLOWN THE AIRPLANE SAID THE ENGINE DID NOT DEVELOP FULL POWER. ANOTHER PILOT-INSTRUCTOR SAID HE NOTICED THE ENGINE REQUIRED 'MORE LEANING' THAN OTHER CESSNA 172S HE HAD FLOWN. ELEVATION AT THE AIRPORT WAS 6172 FEET.
Probable Cause: BLOCKAGE OF THE CARBURETOR BY A PIECE OF FOREIGN MATERIAL, WHICH RESULTED IN A LOSS OF ENGINE POWER, AND FAILURE OF THE PILOT TO MAINTAIN AIRSPEED, WHICH RESULTED IN AN INADVERTENT STALL. THE HIGH DENSITY ALTITUDE AND THE PILOT'S FAILURE TO PROPERLY LEAN THE FUEL MIXTURE WERE POSSIBLE FACTORS.
Accident investigation:
 |
|
Sources:
NTSB FTW95LA374
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 09-Apr-2024 12:29 | ASN Update Bot | Updated [Time, Other fatalities, Phase, Departure airport, Source, Narrative, Category, Accident report] |
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