# Accident 20010806040039A: Cessna 172S, Cooper Landing, AK, August 6, 2001

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: August 6, 2001, 12:00 local time
- Place: Cooper Landing, AK
- Airport: Quartz Creek Airport
- Damage: Destroyed
- Phase of flight: Fcd/Prec Ldg From Cruise
- Operating rules: General operating rules (Part 91)
- Location: 67.2403° N, 161.1903° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=67.2403&lon=-161.1903&mi=10
- Aircraft: N813SP, a cancelled registration (https://openairdocs.org/deregistered/N813SP-2013-05-02) (OpenAirDocs)
- Registry model: Cessna 172S (registry code 2072439, https://openairdocs.org/model/cessna-172s) (OpenAirDocs)
- Registry engine: Lycoming I0360 series (registry code 41515, https://openairdocs.org/engine/lycoming-i0360-series) (OpenAirDocs)
- Reported make and model: CESSNA 172S
- Reported engine: LYC IO360L2A
- People aboard: 2
- Fatal injuries: 0
- NTSB investigation: [NTSB ANC01FA100](https://openairdocs.org/ntsb/ANC01FA100) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20010806040039A

## Narrative

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

(-23) AUGUST 6, 2001 A/C WAS OBSERVED LANDING AT THE QUARTZ CREEK AIRSTRIP NEAR COOPER LANDING, AK. A/C BOUNCED A NUMBER OF TIMES, CAME DOWN THROUGH TREES BEYOND END OF RUNWAY, IMPACTED PAVEMENT OF DRIVEWAY TO A BOAT LANDING, NOSE FIRST. ACCORDING TO INFORMATION PROVIDED BY AN ALASKAN STATE TROOPER, THE AIRCRAFT BEGAN TO PITCH UP AND PILOT WAS UNABLE TO KEEP AIRCRAFT FROM CLIMBING. PILOT DECIDED TO MAKE EMERGENCY LANDING AT QUARTZ CREEK AND MAY HAVE SHUT DOWN THE ENGINE. A WITNESS TO THE ACCIDENT TOLD THE NTSB INVESTIGATOR THAT HE DID NOT HEAR ANY SOUNDS FROM THE ENGINE. ON SITE INSPECTION FOUND THE PITCH TRIM TAB TO BE IN THE FULL NOSE UP POSITION. AIRCRAFT WAS EQUIPPED WITH A HONEYWELL KAP-140 DIGITAL TWO AXIS AUTOPILOT SYSTEM WITH ELECTRIC AND AUTO TRIM. THE AUTOPILOT COMPUTER/CONTROLLER, PITCH, ROLL AND PITCH TRIM SERVOS/CAPSTANS AND PILOTS CONTROL WHEEL WERE REMOVED AND RETAINED BY THE NTSB INVESTIGATOR. A SDR FOR A CESSNA 172R REPORTS THIS AUTOPILOT HAVING TURNED ITSELF ON AND NOT BEING ABLE TO DISENGAGE WITHOUT REMOVING AVIONICS POWER. THIS AIRCRAFT DID NOT HAVE A "PULL" TYPE CIRCUIT BREAKER THAT WOULD HAVE REMOVED POWER FROM THE AUTOPILOT AND ELECTRIC TRIM SYSTEM. CIRCUIT BREAKER WAS ENGAGED AT TIME OF SITE INVESTIGATION. REPORT WILL BE AMENDED WHEN MORE INFORMATION IS AVAILABLE.

## 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 ANC01FA100](https://openairdocs.org/ntsb/ANC01FA100), Aug 6, 2001: Cessna 172S (N813SP), Cooper Landing, AK, substantial damage. Probable cause: The pilot's inadequate remedial action to disconnect the autopilot during an uncommanded altitude deviation while in cruise flight. Factors in the accident were activation of the autopilot; the…

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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