# NTSB ANC88LA106: Cessna 207A, N9829M, Cooper Landing, AK, August 8, 1988

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 8, 1988, 14:30 local (22:30 UTC)
- Place: Cooper Landing, AK
- Coordinates: 60.490215, -149.820907 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=60.4902&lon=-149.8209&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 6 uninjured
- Status: Completed, report April 14, 1989
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5048
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC88LA106
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5048/pdf
- Page: https://openairdocs.org/ntsb/ANC88LA106

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Loss of engine power(total) - mech failure/malf, climb - to cruise
  - lubricating system - no pressure (cause)
  - powerplant - failure,total (cause)
- Forced landing, descent - emergency
- Ditching, landing - flare/touchdown

## Analysis

AFTER LOSS OF OIL PRESSURE THEN ENGINE FAILURE AT 2,800 FEET MSL, THE PILOT ELECTED TO MAKE AN EMERGENCY LANDING ALONG THE SHORE LINE. AFTER THE PILOT AND PASSENGERS EXITED THE AIRCRAFT, THE AIRPLANE SANK INTO 100 TO 150 FEET OF WATER. NEITHER THE AIRPLANE NOR THE ENGINE WAS RECOVERED.

## Aircraft

- Registration: [N9829M](https://openairdocs.org/aircraft/N9829M), registered now, S/N 20700741, built 1981 (OpenAirDocs)
- Reported make and model: CESSNA 207A
- Registry model: [Cessna 207A](https://openairdocs.org/model/cessna-207a) (registry code 2073605) (OpenAirDocs)
- Registry engine: [Continental IO-520-F](https://openairdocs.org/engine/continental-io-520-f) (registry code 17237, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 20700741
- Airframe hours: 2650
- Engines: CONTINENTAL IO-520-F 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 135
- Registered owner: Trail Lake Flying
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, August 4, 1988, 19 hours before
- Departed: SWD, SEWARD, AK
- Destination: ANC, ANCHORAGE, AK
- Flight plan: VFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 30; flight instructor, commercial; airplane ratings: single-engine sea, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 1,300 total, 500 in this make and model, 1,175 as pilot in command, 300 in the last 90 days, 90 in the last 30 days, 6 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 70 statute miles
- Lowest ceiling: none
- Temperature: 64 °F, dew point 39 °F
- Altimeter: 30.00 inHg

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19880808031409A](https://openairdocs.org/incident/19880808031409A), Aug 8, 1988: Cessna 207A, Cooper Landing, AK, Destroyed. Loss of oil pressure, loud bang, oil on windshield and engine quit. Landed off short. Aircraft sank. Not recovered.

## Other investigations on N9829M (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 ANC95LA013](https://openairdocs.org/ntsb/ANC95LA013), Nov 18, 1994: Cessna 207 (N9829M), Akiachak, AK, substantial damage. Probable cause: THE PILOT'S INADEQUATE COMPENSATION FOR CROSSWIND. CROSSWIND CONDITIONS AND AN ICY RUNWAY SURFACE WERE FACTORS IN THE ACCIDENT.

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.

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