# NTSB CHI92LA034: Aero Commander 685, N9196N, Brainerd, MN, November 24, 1991

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Limited investigation · Final report
- Date: November 23, 1991, 21:00 local (Nov 24, 1991, 03:00 UTC)
- Place: Brainerd, MN
- Coordinates: 46.349411, -94.189292 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=46.3494&lon=-94.1893&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious, 2 minor
- Status: Completed, report February 8, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 15351
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI92LA034
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/15351/pdf
- Page: https://openairdocs.org/ntsb/CHI92LA034

## Probable cause

AN ENGINE FAILURE DUE TO A SEIZED FUEL PUMP ROTOR SHAFT.

## 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 - roll/run
  - 1 engine
  - fuel system,pump - seized (cause)
  - emergency procedure - performed, pilot in command
  - aborted takeoff - performed, pilot in command
- On ground/water encounter with terrain/water, takeoff - aborted
  - terrain condition - rough/uneven

## Analysis

THE PILOT REPORTED THAT SHORTLY AFTER TAKEOFF, THE RIGHT ENGINE LOST POWER. AN ABORTED TAKEOFF WAS PERFORMED, BUT THE PILOT WAS UNABLE TO MAINTAIN DIRECTIONAL CONTROL, OR STOP THE AIRPLANE BEFORE IT SWERVED OFF THE REMAINING RUNWAY.  THE AIRPLANE TRAVELED DOWN A 40 FOOT EMBANKMENT THEN SLID INTO A FROZEN SWAMP.  POST ACCIDENT INSPECTION REVEALED A SEIZED FUEL PUMP ROTOR SHAFT AND A BROKEN COUPLING ON THE RIGHT ENGINE'S FUEL PUMP.

## Aircraft

- Registration: [N9196N](https://openairdocs.org/deregistered/N9196N-1992-07-17), registration cancelled 1992-07-17, S/N 12019 (OpenAirDocs)
- Reported make and model: AERO COMMANDER 685
- Registry model: [Aero Commander 685](https://openairdocs.org/model/aero-commander-685) (registry code 0141612) (OpenAirDocs)
- Category: Airplane
- Serial number: 12019
- Engines: CONTINENTAL GTSIO-520-K 435 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Gorhams, Inc.
- Destination: 19D, MORA, MN
- Airport: BRD, Brainerd, runway 3, 4,082 × 75 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 35; flight instructor, airline transport; airplane ratings: single-engine sea, multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; flight hours: 2,810 total, 425 in this make and model, 2,638 as pilot in command, 26 in the last 90 days, 19 in the last 30 days, 7 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Night/dark
- Wind: 330° at 13 knots, gusting 24
- Visibility: 10 statute miles
- Lowest ceiling: 1,000 ft broken
- Temperature: -0 °F, dew point -0 °F
- Observed at: BRD, 1 nm away

## 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 19911123053349A](https://openairdocs.org/incident/19911123053349A), Nov 23, 1991: Gulstm 685, Brainerd, MN, Substantial damage. Lost power right engine on liftoff. Aborted. Lost control. Ran off runway over embankment. Fuel pump shaft sheared.

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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