# NTSB CHI90FA208: Lockheed 12A, N12AT, Oshkosh, WI, July 31, 1990

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Field investigation · Final report
- Date: July 31, 1990, 12:05 local (17:05 UTC)
- Place: Oshkosh, WI
- Coordinates: 44.060295, -88.539916 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=44.0603&lon=-88.5399&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 4 serious, 1 minor
- Status: Completed, report August 25, 1994
- Report: Approved by Office Director
- NTSB case key (mKey): 14543
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI90FA208
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/14543/pdf
- Page: https://openairdocs.org/ntsb/CHI90FA208

## Probable cause

THE INADEQUATE EMERGENCY PROCEDURE(S) BY THE PILOT IN COMMAND FOLLOWING A LOSS OF ENGINE POWER FOR UNDETERMINED REASONS(S).

## Sequence of events

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

- Loss of engine power(total) - nonmechanical, approach - vfr pattern - downwind
  - 1 engine
  - reason for occurrence undetermined (contributing factor)
  - fuel system,fuel quantity float/sensor - false indication
- Forced landing, descent - emergency
  - emergency procedure - inadequate, pilot in command (cause)
- In flight collision with terrain/water, maneuvering - turn to landing area (emergency)

## Analysis

THE PILOT WAS FLYING THE TWIN ENGINE AIRPLANE IN THE TRAFFIC PATTERN FOR A FLY-BY EVENT AT AN AIR SHOW. TWO FLY-BY CIRCUITS HAD BEEN COMPLETED, AND THE AIRPLANE WAS ON THE THIRD DOWNWIND LEG AT AN ESTIMATED ALTITUDE OF 600 TO 800 FEET AGL WHEN THE RIGHT ENGINE LOST POWER. THE MAIN LANDING GEAR HAD BEEN PREVIOUSLY EXTENDED, AND THE PILOT ELECTED NOT TO RETRACT THE LANDING GEAR IN ANTICIPATION OF LANDING ON THE RUNWAY. THE PILOT REPORTED THAT HE PERFORMED EMERGENCY PROCEDURES BY PUSHING THE THROTTLES FORWARD AND ATTEMPTING TO RESTART THE RIGHT ENGINE. THE RIGHT ENGINE DID NOT RESTART, AND THE AIRPLANE COLLIDED WITH TERRAIN SHORT OF THE RUNWAY. THE PILOT DID NOT CLAIM TO HAVE FEATHERED THE INOPERATIVE RIGHT ENGINE'S PROPELLERS. POSTACCIDENT INSPECTION OF THE RIGHT ENGINE REVEALED NO EVIDENCE OF PREIMPACT ANOMALY. THE RIGHT ENGINE'S MAGNETOS AND CARBURETOR WERE DAMAGED AND NOT FUNCTIONALLY TESTED. THE PROPELLER OF THE RIGHT ENGINE WAS FOUND IN AN UNFEATHERED, FINE PITCH POSITION.

## Aircraft

- Registration: [N12AT](https://openairdocs.org/deregistered/N12AT-1994-08-08), registration cancelled 1994-08-08, S/N 1217 (OpenAirDocs)
- Reported make and model: LOCKHEED 12A
- Registry model: [Lockheed 12A](https://openairdocs.org/model/lockheed-12a) (registry code 5261402) (OpenAirDocs)
- Category: Airplane
- Serial number: 1217
- Airframe hours: 9932
- Engines: P&W R985-AN-14B 450 horsepower reciprocating
- Damage: Destroyed
- Flight: Part 91
- Operator: Eaa Air Museum
- Registered owner: Eaa Air Museum
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, September 20, 1989, 9,932 hours before
- Destination: OSH
- Airport: OSH, Oshkosh/Wittman Reg., runway 36, 8,000 × 150 ft

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 58; airline transport, flight instructor; airplane ratings: multi-engine land, single-engine land, multi-engine sea, single-engine sea; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 31,400 total, 20 in this make and model, 26,600 as pilot in command

## Weather

- Conditions: Visual (VMC), Day
- Wind: 90° at 8 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 70 °F, dew point 45 °F
- Altimeter: 30.00 inHg
- Observed at: OSH, 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 19900731029319A](https://openairdocs.org/incident/19900731029319A), Jul 31, 1990: Lkheed 12A, Oshkosh, WI, Destroyed. Lost right engine. Cartwheeled on forced landing. Fuel selected to right rear empty tank that indicated full.

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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