# NTSB FTW92LA196: Cessna 150F, N6650F, Granbury, TX, July 31, 1992

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: July 30, 1992, 20:20 local (Jul 31, 1992, 01:20 UTC)
- Place: Granbury, TX
- Coordinates: 32.440097, -97.780799 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=32.4401&lon=-97.7808&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 2 minor
- Status: Completed, report June 11, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 18546
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW92LA196
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/18546/pdf
- Page: https://openairdocs.org/ntsb/FTW92LA196

## Probable cause

THE PILOT'S INADVERTENT USE OF CARBURETOR HEAT DURING TAKEOFF. THE LACK OF SUITABLE TERRAIN FOR A FORCED LANDING WAS A FACTOR.

## Sequence of events

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

- Loss of engine power(partial) - nonmechanical, takeoff - initial climb
  - carburetor heat - inadvertent use, pilot in command (cause)
- Forced landing, descent - emergency
- Ditching, maneuvering - turn to landing area (emergency)
  - terrain condition - none suitable

## Analysis

THE STUDENT PILOT AND HIS PASSENGER WERE DEPARTING FROM THE PRIVATE AIRSTRIP WHEN THE PILOT NOTED A 200 RPM DROP ON THE ENGINE TACHOMETER. THE PILOT ESTIMATED HIS ALTITUDE TO BE 120 FEET ABOVE GROUND LEVEL. THE PILOT STATED THAT HOUSES WERE BELOW THE AIRPLANE SO HE ELECTED TO CONTINUE TOWARD THE LAKE. AFTER CLEARING THE RESIDENTIAL AREA, THE AIRPLANE DESCENDED OVER THE LAKE AND THE PILOT DITCHED INTO THE WATER AT 40 MPH. BEFORE THE AIRPLANE SANK, THE PILOT AND PASSENGER EXITED AND WERE PICKED UP BY A NEAR BY BOATER. THE FAA INSPECTOR EXAMINED THE AIRPLANE AND NOTED THE CARBURETOR HEAT CONTROL IN THE FULL 'ON' POSITION. NO AIRCRAFT MECHANICAL ANOMALIES WERE NOTED.

## Aircraft

- Registration: [N6650F](https://openairdocs.org/deregistered/N6650F-1992-10-21), registration cancelled 1992-10-21, S/N 15063250 (OpenAirDocs)
- Reported make and model: CESSNA 150F
- Registry model: [Cessna 150F](https://openairdocs.org/model/cessna-150f) (registry code 2071814) (OpenAirDocs)
- Category: Airplane
- Serial number: 15063202
- Engines: CONTINENTAL O-200-A 100 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Chambers, Thomas R.
- Registered owner: Beasley, T.L. & K.S.
- Airworthiness certificate: Standard, Normal
- Last inspection: Unknown, January 2, 1900
- Departed: NONE, NASSAU BAY, TX

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 42; student; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 165 total, 15 in this make and model, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 180° at 5 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 90 °F
- Altimeter: 29.00 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 19920730028619A](https://openairdocs.org/incident/19920730028619A), Jul 30, 1992: Cessna 150F, Granbury, TX, Substantial damage. Lost power on climbout. Ditched in lake. No defects noted. Possible carb icing. Student not rated for passengers.

## Other investigations on N6650F (2)

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 FTW68F0551](https://openairdocs.org/ntsb/FTW68F0551), Apr 14, 1968: Cessna 150 (N6650F), New Orleans, LA, substantial damage
- [NTSB FTW68F0176](https://openairdocs.org/ntsb/FTW68F0176), Aug 23, 1967: Cessna 150 (N6650F), New Orleans, LA, substantial damage

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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