# NTSB ANC91LA149: Champion 7AC, N9172L, Skwentna, AK, September 12, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: September 11, 1991, 20:00 local (Sep 12, 1991, 04:00 UTC)
- Place: Skwentna, AK
- Coordinates: 61.9309, -151.730651 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=61.9309&lon=-151.7307&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report March 31, 1993
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5622
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC91LA149
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5622/pdf
- Page: https://openairdocs.org/ntsb/ANC91LA149

## Probable cause

THE PILOT'S FAILURE IN NOT MAINTAINING AIRCRAFT CONTROL ON LANDING. CONTRIBUTING TO THE ACCIDENT WAS THE ROUGH, UNEVEN TERRAIN AND A WET AND SLICK LANDING AREA.

## Sequence of events

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

- Loss of control - on ground/water, landing - roll
  - terrain condition - rough/uneven (contributing factor)
  - aircraft control - not maintained, pilot in command (cause)
  - terrain condition - wet (contributing factor)
- On ground/water encounter with terrain/water, landing - roll

## Analysis

THE PILOT STATED THAT DURING THE LANDING ROLL, THE AIRPLANE HAD POOR BRAKING ACTION.  ONE BRAKE GRABBED DUE TO THE SLICK SOD RUNWAY AND THE AIRPLANE STRUCK A STUMP.

## Aircraft

- Registration: [N9172L](https://openairdocs.org/deregistered/N9172L-1995-01-31), registration cancelled 1995-01-31, S/N 2972 (OpenAirDocs)
- Reported make and model: CHAMPION 7AC
- Registry model: [Bellanca 7ACA](https://openairdocs.org/model/bellanca-7aca) (registry code 1220438) (OpenAirDocs)
- Category: Airplane
- Serial number: 2972
- Airframe hours: 1275
- Engines: CONTINENTAL A-75 75 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Michael Keim
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, August 29, 1991, 30 hours before
- Departed: NONE, BIG LAKE, AK
- Airport: NONE, Keim Private, runway 3, 1,000 × 35 ft, grass/turf

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 38; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: front; flight hours: 1,030 total, 965 in this make and model, 980 as pilot in command, 25 in the last 90 days, 8 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 10 statute miles
- Lowest ceiling: 1,200 ft broken
- Temperature: 50 °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 19910911040479A](https://openairdocs.org/incident/19910911040479A), Sep 11, 1991: Bbavia 7AC, Skwentna, AK, Substantial damage. Landed on wet grass strip. Slid off strip and hit a stump.

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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