# Accident 20071010825299A: Cessna 172L, Prescott, AZ, October 10, 2007

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: October 10, 2007, 10:15 local time
- Place: Prescott, AZ
- Damage: Substantial damage
- Phase of flight: Fcd/Prec Ldg From Cruise
- Operating rules: General operating rules (Part 91)
- Location: 34.6544° N, 112.4194° W: From the FAA
- Nearby events: https://openairdocs.org/map.md?lat=34.6544&lon=-112.4194&mi=10
- Aircraft: N9897G, a cancelled registration (https://openairdocs.org/deregistered/N9897G-2011-05-31) (OpenAirDocs)
- Registry model: Cessna 172L (registry code 2072432, https://openairdocs.org/model/cessna-172l) (OpenAirDocs)
- Registry engine: Lycoming 0-320 series (registry code 41508, https://openairdocs.org/engine/lycoming-0-320-series) (OpenAirDocs)
- Reported make and model: CESSNA 172L
- Reported engine: LYC O320E2D
- Fatal injuries: 0
- Pilot flight hours: 280 total, 125 in this make and model, 2 in the last 90 days
- NTSB investigation: [NTSB LAX08LA009](https://openairdocs.org/ntsb/LAX08LA009) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20071010825299A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

(-23) THE AIRCRAFT WAS ON ITS SECOND FLIGHT SINCE THE ENGINE HAD HAD A MAJOR OVERHAUL AND AT A TSO OF ABOUT 2 HOURS, WHEN THE ENGINE FAILED TO MAKE ADEQUATE POWER. THE PILOT STATED THAT DURING LEVEL FLIGHT THE ENGINE SUDDENLY LOST POWER AND STARTED SPUTTERING; THAT HE THOUGHT IT SOUNDED VERY ROUGH AND WAS PROBABLY FIRING ON ONE OR TWO CYLINDERS; THAT POWER AND MIXTURE INPUTS HAD NO RESPONSE; THAT ENGINE RPM DROPPED TO ABOUT 1100; AND THAT CARB HEAT AND FUEL TANK SELECTIONS HAD NO EFFECT. THE PILOT SAID THAT NEAR THE GROUND THE WINDS BECAME VERY GUSTY AND THAT HE COULD NOT MAKE THE PASTURE HE WAS INTENDING TO DO AN EMERGENCY LANDING IN. THE AIRCRAFT HIT A BERM JUST NEXT TO WILLIAMSON VALLEY ROAD, THE AIRCRAFT FLIPPED OVER WITH THE NOSE GEAR COLLAPSING AND THE MAIN GEAR INTACT, ENDING UPSIDE DOWN AND WITH THE TAIL BROKEN OFF. VARIOUS WITNESSES' STATEMENTS INDICATE THAT THE AIRCRAFT WAS TRAILING PUFFS OF BLACK SMOKE AND THAT THE ENGINE SOUNDED LIKE A "JACKHAMMER." THERE WAS FUEL IN BOTH TANKS AND GASCOLATOR HAD FUEL, THERE WAS OIL IN THE ENGINE, AND NO EXTERNAL EVIDENCE OF ENGINE FAILURE.

## The NTSB's investigation of this event (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB LAX08LA009](https://openairdocs.org/ntsb/LAX08LA009), Oct 10, 2007: Cessna 172L (N9897G), Prescott, AZ, substantial damage. Probable cause: The failure of maintenance personnel to detect fatigue cracks in the number 3 exhaust rocker arm, which lead to a partial loss of engine power.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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