# NTSB FTW90LA149: Cessna 150M, N704FS, Alvord, TX, July 31, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 31, 1990, 11:15 local (16:15 UTC)
- Place: Alvord, TX
- Coordinates: 33.35054, -97.690635 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=33.3505&lon=-97.6906&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report December 14, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 23164
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW90LA149
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/23164/pdf
- Page: https://openairdocs.org/ntsb/FTW90LA149

## Probable cause

THE FAILURE OF THE ENGINE TO DEVELOP FULL RATED POWER FOR UNKNOWN REASONS.

## Sequence of events

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

- Loss of engine power, maneuvering
  - reason for occurrence undetermined (cause)
  - emergency procedure - simulated (contributing factor)
- In flight collision with object, maneuvering
  - object - tree(s)

## Analysis

AT APPROX 200 FEET AGL, UPON COMPLETION OF A PRACTICE FORCED LANDING PROCEDURE, CARBURETOR HEAT WAS DE-SELECTED, FULL THROTTLE APPLIED AND THE FLAP SETTING REDUCED FROM 40 DEG TO 20 DEG. ACCORDING TO THE CFI, THE ENGINE DID NOT DEVELOP FULL POWER WITH THE RPM OBSERVED TO BE 2100 VICE 2700 RPM AT RATED POWER. THE AIRPLANE CONTINUED ON THE SAME HEADING, CROSSED OVER A WOODED AREA BARELY CLEARING THE TREES, AND SETTLED IN A NOSE-HIGH, CONTROLLED ATTITUDE, INTO THE TREES FOLLOWED BY GROUND CONTACT. EXAMINATION AT THE CRASH SITE REVEALED THAT THE CARBURETOR HEAT VALVE OPERATED NORMALLY, THE ENGINE SPARK PLUGS AND EXHAUST STACKS WERE FREE FROM MAJOR DEPOSITS AND THAT THE OUTBOARD TIPS OF THE PROPELLER BLADES WERE BENT OPPOSITE TO THE DIRECTION OF ROTATION. A FOUR INCH DIAMETER OAK LIMB HAD BEEN SLASHED BY THE PROPELLER.

## Aircraft

- Registration: [N704FS](https://openairdocs.org/deregistered/N704FS-2005-08-08), registration cancelled 2005-08-08, S/N 15078581, built 1976 (OpenAirDocs)
- Reported make and model: CESSNA 150M
- Registry model: [Cessna 150M](https://openairdocs.org/model/cessna-150m) (registry code 2071830) (OpenAirDocs)
- Registry engine: [Continental 0-200 series](https://openairdocs.org/engine/continental-0-200-series) (registry code 17020, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 15078581
- Airframe hours: 1971
- Engines: CONTINENTAL O-200A 100 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Registered owner: Patrick R. Johnson
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, June 17, 1990, 109 hours before
- Departed: 8F7, DECATUR, TX
- Destination: 0F2, BOWIE, TX
- Airport: NONE

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 33; flight instructor, commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; flight hours: 850 total, 790 in this make and model, 750 as pilot in command, 100 in the last 90 days, 30 in the last 30 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 50° at 10 knots
- Visibility: 12 statute miles
- Lowest ceiling: none
- Temperature: 81 °F, dew point 68 °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 19900731029419A](https://openairdocs.org/incident/19900731029419A), Jul 31, 1990: Cessna 150M, Alvord, TX, Substantial damage. Stalled into trees on a go around from a practice forced landing.

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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