# NTSB DEN91LA033: Cessna 152, N94330, Crowley, TX, January 17, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: January 17, 1991, 10:20 local (16:20 UTC)
- Place: Crowley, TX
- Coordinates: 32.570087, -97.350502 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=32.5701&lon=-97.3505&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report May 5, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 18066
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN91LA033
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/18066/pdf
- Page: https://openairdocs.org/ntsb/DEN91LA033

## Probable cause

A POWER LOSS DUE TO CARBURETOR ICE RESULTING FROM THE FLIGHT INSTRUCTORS FAILURE TO USE CORRECT ENGINE MANAGEMENT PROCEDURES. A FACTOR WAS THE ROUGH TERRAIN IN WHICH THE FORCED LANDING WAS PERFORMED.

## Analysis

THE INSTRUCTOR RETARDED THE THROTTLE AND ASKED THE PILOT TO DEMONSTRATE A SIMULATED FORCED LANDING.  AFTER DEMONSTRATING THE PROCEDURE, THE PILOT APPLIED FULL THROTTLE BUT THE ENGINE DID NOT RESPOND.  THE INSTRUCTOR ASSUMED CONTROL OF THE AIRPLANE, LANDED ON UNEVEN TERRAIN, AND THE AIRPLANE OVERTURNED.  THE ENGINE WAS LATER TESTED AND FUNCTIONED NORMALLY. THE INSTRUCTOR AND PILOT LATER SAID CARBURETOR HEAT HAD NOT APPLIED PRIOR TO THE POWER REDUCTION, AND CARBURETOR ICE CAUSED THE POWER LOSS. THE ENGINE WAS LATER FUNCTIONALLY TESTED BY THE FAA COORDINATOR.  IT RAN NORMALLY.

## Sequence of events

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

- Loss of engine power, descent - normal
  - carburetor heat - not used, pilot in command(cfi) (contributing factor)
  - carburetor heat - not corrected, pilot in command (contributing factor)
  - fuel system,carburetor - ice (cause)
- Forced landing, descent - emergency
- In flight collision with terrain/water, landing
  - terrain condition - rough/uneven (contributing factor)

## Aircraft

- Registration: N94330 (not matched to a registry record)
- Reported make and model: CESSNA 152
- Category: Airplane
- Serial number: 15285650
- Engines: LYCOMING O-235-N2C 108 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Operator: Qualiflight Training
- Departed: FTS, FORT WORTH, TX
- Airport: FWS, Fort Worth Spinks

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 26; flight instructor, commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; flight hours: 736 total, 661 in this make and model, 693 as pilot in command, 118 in the last 90 days, 18 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 12 statute miles
- Lowest ceiling: none
- Temperature: -0 °F, dew point -0 °F

## 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 19910117000649A](https://openairdocs.org/incident/19910117000649A), Jan 17, 1991: Cessna 152, Fort Worth, TX, Substantial damage. Engine failed to respond on go around from a sfl practice. CFI took over but aircraft nosed over in rough terrain.

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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