# NTSB FTW91FA149: Cessna 150K, N6102G, Waller, TX, August 20, 1991

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: August 20, 1991, 15:30 local (20:30 UTC)
- Place: Waller, TX
- Coordinates: 30.050949, -95.91996 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=30.0509&lon=-95.9200&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 2 fatal
- Status: Completed, report March 24, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 23276
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW91FA149
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/23276/pdf
- Page: https://openairdocs.org/ntsb/FTW91FA149

## Probable cause

THE INSTRUCTOR PILOT'S FAILURE TO TAKE REMEDIAL ACTION DURING STALL/SPIN TRAINING. FACTORS WERE THE INSTRUCTOR'S OVERCONFIDENCE IN HIS PERSONAL ABILITY AND THE STUDENT'S APPREHENSION OF STALLS.

## Sequence of events

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

- Loss of control - in flight, maneuvering
  - stall/spin - intentional, pilot in command(cfi) (contributing factor)
  - anxiety/apprehension, dual student (contributing factor)
- In flight collision with terrain/water, descent - uncontrolled
  - remedial action - not performed, pilot in command(cfi) (cause)
  - overconfidence in personal ability, pilot in command(cfi)

## Analysis

AN INSTRUCTOR PILOT AND HIS NINE HOUR STUDENT PILOT WERE ON THEIR FIRST FLIGHT TOGETHER TO PRACTICE SLOW FLIGHT AND STALLS. ACCORDING TO PERSONS CLOSE TO THE STUDENT PILOT, HE HAD DELAYED TAKING FLYING LESSONS FOR SEVERAL YEARS DUE TO HIS APPREHENSION FOR PRACTICING ANY TYPE OF STALLS. THE INSTRUCTOR PILOT HAD PROMISED TO CURE THE STUDENT OF HIS FEAR OF STALLS. TWO WITNESSES OBSERVED THE AIRPLANE ENTERING AND RECOVERING FROM TWO CONSECUTIVE SPINS. THE AIRPLANE WAS REPORTED MISSING IN THE EARLY EVENING AFTER IT FAILED TO RETURN FROM THE TRAINING FLIGHT. WRECKAGE WAS FOUND IN AN OPEN PASTURE THE NEXT MORNING. THE AIRPLANE IMPACTED THE GROUND IN A SLIGHT NOSE DOWN ATTITUDE, IN A SLIGHT RIGHT TURN, WITH NO FORWARD AIRSPEED, RESULTING IN HEAVY COMPRESSION DAMAGE.

## Aircraft

- Registration: [N6102G](https://openairdocs.org/deregistered/N6102G-1994-02-01), registration cancelled 1994-02-01, S/N 15071602 (OpenAirDocs)
- Reported make and model: CESSNA 150K
- Registry model: [Cessna 150K](https://openairdocs.org/model/cessna-150k) (registry code 2071822) (OpenAirDocs)
- Category: Airplane
- Serial number: 15071602
- Airframe hours: 3935
- Engines: CONTINENTAL O-200-A 100 horsepower reciprocating
- Damage: Destroyed
- Flight: Instructional, Part 91
- Operator: Hoseph R. Mock, doing business as Wings Of Houston
- Registered owner: Hoseph R. Mock
- Airworthiness certificate: Standard, Utility
- Last inspection: 100 hour, July 5, 1991, 64 hours before
- Departed: DWH, HOUSTON, TX

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 38; airline transport, flight instructor; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: right; toxicology performed; flight hours: 1,575 total, 525 in this make and model, 1,377 as pilot in command, 74 in the last 90 days, 36 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 50° at 8 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 97 °F, dew point 64 °F
- Altimeter: 30.00 inHg

## 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 19910820035629A](https://openairdocs.org/incident/19910820035629A), Aug 20, 1991: Cessna 150K, Houston, TX, Destroyed, 2 fatal. Wreckage indicates aircraft failed pull out of dive. Impacted flat. CFI taught spins.

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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