# NTSB FTW91LA108: Cessna 152, N93097, Hutto, TX, June 25, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 25, 1991, 16:10 local (21:10 UTC)
- Place: Hutto, TX
- Coordinates: 30.540969, -97.540328 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=30.5410&lon=-97.5403&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report May 7, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 23354
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW91LA108
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/23354/pdf
- Page: https://openairdocs.org/ntsb/FTW91LA108

## Probable cause

THE ENGINE FAILURE DUE TO CARBURETOR ICE. FACTORS WERE THE INSTRUCTOR'S IMPROPER USE OF CARBURETOR HEAT AND THE FOULED SPARK PLUGS.

## Sequence of events

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

- Loss of engine power(total) - nonmechanical, go-around (vfr)
  - weather condition - carburetor icing conditions
  - fuel system,carburetor - ice (cause)
  - carburetor heat - improper use of, pilot in command(cfi) (contributing factor)
  - ignition system,spark plug - fouled (contributing factor)
- Forced landing, descent - emergency
- Nose over, landing - flare/touchdown
  - terrain condition - soft

## Analysis

FOLLOWING A SIMULATED FORCED LANDING, THE STUDENT PILOT SIMULTANEOUSLY APPLIED POWER AND RETRACTED THE FLAPS. AS A CLIMB ATTITUDE WAS INITIATED, THE ENGINE COUGHED AND THEN QUIT. THE INSTRUCTOR THEN EXECUTED A FORCED LANDING TO AN OPEN FIELD. DURING THE LANDING ROLL, THE NOSE GEAR DUG INTO SOFT TERRAIN AND THE AIRPLANE NOSED OVER. EXAMINATION OF THE ENGINE REVEALED THAT IT HAD THREE FOULED SPARK PLUGS. WEATHER CONDITIONS WERE CONDUCIVE TO THE FORMATION OF CARBURETOR ICING AT CRUISE AND GLIDE POWER SETTINGS. IN HIS STATEMENT, THE INSTRUCTOR DID NOT MENTION WHETHER HE OR THE STUDENT HAD APPLIED CARBURETOR HEAT DURING THE SIMULATED FORCED LANDING.

## Aircraft

- Registration: [N93097](https://openairdocs.org/deregistered/N93097-2003-07-02), registration cancelled 2003-07-02, S/N 15285400 (OpenAirDocs)
- Reported make and model: CESSNA 152
- Registry model: [Cessna 152](https://openairdocs.org/model/cessna-152) (registry code 2071835) (OpenAirDocs)
- Category: Airplane
- Serial number: 15285400
- Engines: LYCOMING O-235-L2C 110 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Operator: Air Center II
- Airworthiness certificate: Standard, Utility; Standard, Normal
- Departed: 3R3, AUSTIN, TX

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 30; flight instructor, commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; flight hours: 1,030 total, 350 in this make and model, 900 as pilot in command, 250 in the last 90 days, 100 in the last 30 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 120° at 13 knots
- Visibility: 10 statute miles
- Lowest ceiling: 4,400 ft broken
- Temperature: 91 °F, dew point 73 °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 19910625023899A](https://openairdocs.org/incident/19910625023899A), Jun 25, 1991: Cessna 152, Hutto, TX, Substantial damage. Simulated forced landing. Engine quit on go around. CFI landed plane in soft field. Nosed over. Fouled plugs. Carb ice

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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