# NTSB ANC90LA006: Cessna 185, N70022, Tuluksak, AK, October 15, 1989

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: October 14, 1989, 20:15 local (Oct 15, 1989, 04:15 UTC)
- Place: Tuluksak, AK
- Location: 61.1044° N, 160.9384° W: Placed by OpenAirDocs: center of Tuluksak, AK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=61.1044&lon=-160.9384&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report June 28, 1991
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5317
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC90LA006
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5317/pdf
- Page: https://openairdocs.org/ntsb/ANC90LA006

## Probable cause

MOUNTING SHAFT (AIRBOX THROUGH-SHAFT) FOR THE THROTTLE AND MIXTURE CONTROLS HAD BECOME LOOSE AND BACKED OUT, WHICH RESULTED IN LOSS OF ENGINE POWER.  FACTORS RELATED TO THE ACCIDENT WERE:  DARKNESS AND ROUGH TERRAIN.

## Sequence of events

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

- Loss of engine power(total) - nonmechanical, cruise
  - throttle/power lever,linkage - loose (cause)
  - mixture control,bellcrank - loose (cause)
- Forced landing, descent - emergency
- Nose over, landing - roll
  - light condition - dark night (contributing factor)
  - terrain condition - rough/uneven (contributing factor)

## Aircraft

- Registration: [N70022](https://openairdocs.org/aircraft/N70022), registered now, S/N 18501897, built 1971 (OpenAirDocs)
- Reported make and model: CESSNA 185
- Registry model: [Cessna A185E](https://openairdocs.org/model/cessna-a185e) (registry code 2072818) (OpenAirDocs)
- Registry engine: [Continental IO-520-D](https://openairdocs.org/engine/continental-io-520-d) (registry code 17236, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 18507897
- Engines: CONTINENTAL IO-520 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: John Martinez
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, August 15, 1989
- Departed: BET, BETHEL, AK
- Destination: ANI, ANIAK, AK
- Flight plan: VFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 38; airline transport; airplane ratings: single-engine land, multi-engine land, single-engine sea; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 11,000 total, 884 in this make and model, 290 in the last 90 days, 88 in the last 30 days, 7 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Night/bright
- Visibility: 7 statute miles
- Temperature: 25 °F, dew point 19 °F
- Altimeter: 29.00 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 19891014040319A](https://openairdocs.org/incident/19891014040319A), Oct 14, 1989: Cessna A185E, Tuluksak, AK, Substantial damage. Lost power near airport but landed short. Shaft through airbox backed out due loss of roll pin. Lost mixture throttle

## Other investigations on N70022 (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 ANC72AA027](https://openairdocs.org/ntsb/ANC72AA027), Nov 26, 1971: Cessna 185 (N70022), Skwentna, AK, substantial damage

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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