# NTSB CHI92LA133: Boeing A75N1, N59528, Washington, MO, April 26, 1992

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: April 26, 1992, 16:00 local (21:00 UTC)
- Place: Washington, MO
- Coordinates: 38.550281, -91.010528 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=38.5503&lon=-91.0105&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor, 1 uninjured
- Status: Completed, report July 26, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 15431
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI92LA133
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/15431/pdf
- Page: https://openairdocs.org/ntsb/CHI92LA133

## Probable cause

THE PILOT IN COMMAND'S IMPROPER USE OF THE CARBURETOR HEAT CONTROL.

## Sequence of events

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

- Loss of engine power(total) - nonmechanical, takeoff - initial climb
  - weather condition - carburetor icing conditions (contributing factor)
  - carburetor heat - improper use of, pilot in command(cfi) (cause)
  - fuel system,carburetor - ice (cause)
- Forced landing, descent - emergency
- Nose over, landing - roll
  - terrain condition - rough/uneven (contributing factor)

## Analysis

THE FLIGHT INSTRUCTOR WAS GIVING INSTRUCTION TO THE PRIVATE PILOT IN TAKEOFF AND LANDINGS. SHORTLY AFTER THE FOURTH TAKEOFF, AT AN ESTIMATED ALTITUDE OF 800' AGL, THE ENGINE BACKFIRED AND LOST POWER. CARBURETOR HEAT WAS APPLIED AFTER THE POWER LOSS. A FORCED LANDING WAS MADE TO A ROUGH FIELD, AND THE AIRPLANE NOSED OVER DURING THE GROUND ROLL. AN INSPECTION AND RUN-UP OF THE ENGINE FAILED TO DISCLOSE ANY MECHANICAL ANOMALIES. PREVAILING METEOROLOGICAL CONDITIONS WERE CONDUCIVE TO THE FORMATION OF SERIOUS CARBURETOR ICING.

## Aircraft

- Registration: [N59528](https://openairdocs.org/deregistered/N59528-2019-04-19), registration cancelled 2019-04-19, S/N 75-1164, built 1941 (OpenAirDocs)
- Reported make and model: BOEING A75N1
- Registry model: [Boeing A75N1(PT17)](https://openairdocs.org/model/boeing-a75n1-pt17) (registry code 1380134) (OpenAirDocs)
- Registry engine: [Continental W670 series](https://openairdocs.org/engine/continental-w670-series) (registry code 17018, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 75-1164
- Engines: CONTINENTAL W-670 220 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Operator: Cochran Aviation
- Registered owner: Cochran Aviation
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, January 2, 2000

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 53; flight instructor, commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: front; flight hours: 3,500 total, 400 in this make and model, 3,000 as pilot in command, 38 in the last 90 days, 16 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 330° at 7 knots
- Visibility: 7 statute miles
- Lowest ceiling: 3,700 ft broken
- Temperature: 48 °F, dew point 37 °F
- Altimeter: 30.00 inHg
- Observed at: SUS, 20 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 19920426011659A](https://openairdocs.org/incident/19920426011659A), Apr 26, 1992: Boeing A75N1, Washington, MO, Substantial damage. Engine quit on climbout. Ground looped and nosed over in field off airport. Serious carburetor icing conditions.

## Other investigations on N59528 (1)

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.

- [NTSB MIA94LA055](https://openairdocs.org/ntsb/MIA94LA055), Jan 16, 1994: Boeing A75N1 (N59528), Zellwood, FL, substantial damage. Probable cause: INADVERTENT STALL/SPIN BY THE PILOT-IN-COMMAND WHILE EXECUTING A SPIRAL TO LANDING MANEUVER DURING THE BASE TO FINAL TURN.

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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