# NTSB ANC84LA181: Cessna 152 II, N94505, Skwentna, AK, September 17, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: September 16, 1984, 18:30 local (Sep 17, 1984, 02:30 UTC)
- Place: Skwentna, AK
- Coordinates: 61.929595, -151.729141 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=61.9296&lon=-151.7291&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4375
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC84LA181
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4375/pdf
- Page: https://openairdocs.org/ntsb/ANC84LA181

## 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, takeoff - initial climb
  - operation with known deficiencies in equipment - intentional, pilot in command (contributing factor)
  - ignition system,magneto - binding(mechanical) (cause)
  - maintenance,service bulletin/letter - not performed, fbo personnel (contributing factor)
- Forced landing, descent - emergency
- Ditching, landing

## Analysis

FBO HAD BEEN EXPERIENCING DIFFICULTIES WITH SPARK PLUGS AND MAGNETOS IN THIS ACFT. THE PLT HAD FLOWN THIS ACFT BEFORE WITH RECURRENT ROUGH RUNNING AND DIMINISHED POWER SYMPTOMS. ENG BEGAN TO RUN ROUGH ON THIS FLT AND PLT LANDED ON A SAND BAR (MARKED FOR ACFT USE) TO CHECK IGNITION LEADS AND FUEL FOR CONTAMINATION. ON TAKEOFF, TOTAL POWER LOSS WAS EXPERIENCED AS THE ACFT REACHED ABOUT 2O FT AGL. PLT DITCHED THE ACFT IN THE RIVER. INVESTIGATION REVEALED THE MAGNETO BEARINGS WERE SEIZED. SERVICE BULLETIN RECOMMENDING REPLACEMENT OF BEARINGS HAD NOT BEEN COMPLIED WITH.

## Aircraft

- Registration: [N94505](https://openairdocs.org/aircraft/N94505), registered now, S/N 15285696, built 1983 (OpenAirDocs)
- Reported make and model: CESSNA 152 II
- Registry model: [Cessna 152](https://openairdocs.org/model/cessna-152) (registry code 2071835) (OpenAirDocs)
- Registry engine: [Lycoming 0-235 series](https://openairdocs.org/engine/lycoming-0-235-series) (registry code 41505, 4 cycle) (OpenAirDocs)
- Category: Airplane
- Serial number: 15285696
- Airframe hours: 1401
- Engines: LYCOMING O-235-N2C 108 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Alaska Aviation School
- Registered owner: Hilary A. Whitehead
- Airworthiness certificate: Standard, Normal
- Departed: KAHILTNA RIVER, AK
- Destination: MRI, ANCHORAGE, AK

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 25; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 90 total, 85 in this make and model, 65 as pilot in command, 10 in the last 90 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 90 statute miles
- Lowest ceiling: none
- Temperature: 64 °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 19840916051439A](https://openairdocs.org/incident/19840916051439A), Sep 16, 1984: Cessna 152, Skwentna, AK, Substantial damage. Pilot made precautionary landing on sand bar because of rough engine. Crash occurred during attempted takeoff.

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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