# NTSB ANC90LA128: Cessna 337, N2271X, Kustatan River, AK, July 31, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 30, 1990, 22:00 local (Jul 31, 1990, 06:00 UTC)
- Place: Kustatan River, AK
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report October 7, 1992
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5414
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC90LA128
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5414/pdf
- Page: https://openairdocs.org/ntsb/ANC90LA128

## Probable cause

PILOT-IN-COMMAND'S FAILURE TO ASSURE THAT THE REAR ENGINE DEVELOPED FULL TAKEOFF POWER AND TO ATTAIN TAKEOFF AIRSPEED. CONTRIBUTING FACTORS WERE THE TERRAIN CONDITIONS.

## Sequence of events

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

- Gear collapsed, takeoff - aborted
  - terrain condition - loose gravel/sandy (contributing factor)
  - powerplant controls - improper use of, pilot in command (cause)
  - airspeed - not attained, pilot in command (cause)
  - aborted takeoff - performed, pilot in command
  - terrain condition - soft (contributing factor)
  - landing gear,nose gear - overload

## Analysis

THE PLT REPORTED THAT RIGHT AFTER TAKEOFF FROM THE GRAVEL BAR HE '...FELT THE PLANE SLOW DOWN...AND SAW THE REAR RPM WAS DROPING...'  THE TAKEOFF WAS ABORTED AND THE NOSE GEAR SEPARATED DURING THE TOUCHDOWN IN SOFT TERRAIN.

## Aircraft

- Registration: [N2271X](https://openairdocs.org/aircraft/N2271X), registered now, S/N 337-0171, built 1965 (OpenAirDocs)
- Reported make and model: CESSNA 337
- Registry model: [Cessna 337](https://openairdocs.org/model/cessna-337) (registry code 2075702) (OpenAirDocs)
- Registry engine: [Continental IO-360 series](https://openairdocs.org/engine/continental-io-360-series) (registry code 17025, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 3370171
- Airframe hours: 2584
- Engines: CONTINENTAL IO-360-D 210 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Flores, Michael
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, July 15, 1989, 124 hours before
- Destination: ANCHORAGE, AK

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 31; commercial; airplane ratings: single-engine land, single-engine sea, multi-engine land; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 921 total, 271 in this make and model, 834 as pilot in command, 195 in the last 90 days, 97 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 35 statute miles
- Lowest ceiling: 5,000 ft overcast
- Temperature: 50 °F, dew point 39 °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 19900730029409A](https://openairdocs.org/incident/19900730029409A), Jul 30, 1990: Cessna 337, Kustatan River, AK, Substantial damage. Reported rear engine lost power on takeoff. Aborted late. Ran off runway.

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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