# NTSB FTW91FA081: Cessna 150J, N1019M, Caney, OK, May 18, 1991

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: May 18, 1991, 16:30 local (21:30 UTC)
- Place: Caney, OK
- Coordinates: 34.230918, -96.209106 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=34.2309&lon=-96.2091&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 2 fatal
- Status: Completed, report March 17, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 23261
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW91FA081
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/23261/pdf
- Page: https://openairdocs.org/ntsb/FTW91FA081

## Probable cause

BINDING OF THE #2 EXHAUST VALVE (STUCK VALVE), AND FAILURE OF THE PILOT TO MAINTAIN ADEQUATE AIRSPEED, WHICH RESULTED IN AN INADVERTENT STALL.  A FACTOR RELATED TO THE ACCIDENT WAS: THE FAILED EXHAUST MANIFOLD GASKET.

## Sequence of events

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

- Loss of engine power(partial) - mech failure/malf, maneuvering
  - exhaust system,gasket - failure,total (contributing factor)
  - engine assembly,valve,exhaust - binding(mechanical) (cause)
- Forced landing, maneuvering - turn to landing area (emergency)
- Loss of control - in flight, maneuvering - turn to landing area (emergency)
  - airspeed - inadequate, pilot in command (cause)
  - stall - inadvertent, pilot in command (cause)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

THE PLT & PASSENGER WERE PARTICIPATING IN AN ACTIVITY TO COMPETE IN DROPPING PAPER SACKS OF FLOWER IN A CIRCLE ON THE GROUND AT A FLY-IN.  AFTER THE PLT HAD JUST COMPLETED A LOW PASS, WITNESSES NOTED THE ENG BEGAN RUNNING ROUGH, THEN THE ACFT DESCENDED & CRASHED.  AN EXAM OF THE WRECKAGE REVEALED THE ACFT HAD IMPACTED IN A STEEP DESCENT.  THE PROP BLADES WERE EQUALLY DISTORTED & BOTH BLADES CONTAINED ROTATIONAL SCUFF MARKS.  A TEARDOWN OF THE ENG REVEALED THE #2 CYLINDER HAD A BLOWN EXHAUST MANIFOLD GASKET & THAT ITS RESPECTIVE EXHAUST VALVE WAS STUCK.  ALSO, HEAT DAMAGE WAS NOTED ON THE #4 CYLINDER, DUE TO ESCAPING EXHAUST GASES.

## Aircraft

- Registration: [N1019M](https://openairdocs.org/deregistered/N1019M-1991-09-20), registration cancelled 1991-09-20, S/N 15070999 (OpenAirDocs)
- Reported make and model: CESSNA 150J
- Registry model: [Cessna 150J](https://openairdocs.org/model/cessna-150j) (registry code 2071820) (OpenAirDocs)
- Category: Airplane
- Serial number: 15070999
- Engines: CONTINENTAL O-200-A 100 horsepower reciprocating
- Damage: Destroyed
- Flight: Part 91
- Operator: Bestway Aviation #2
- Registered owner: Unknown

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 19; private; airplane ratings: single-engine land; medical: class 1, valid medical--no waivers/lim.; toxicology performed; flight hours: 80 total, 70 in this make and model, 29 as pilot in command, 30 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 80° at 4 knots
- Visibility: 20 statute miles
- Lowest ceiling: 25,000 ft broken
- Temperature: 84 °F, dew point 64 °F
- Altimeter: 30.00 inHg
- Observed at: MLC, 80 nm away

## 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 19910518016329A](https://openairdocs.org/incident/19910518016329A), May 18, 1991: Cessna 150J, Caney, OK, Destroyed, 2 fatal. Cut power dropping flour bag in contest. Popped. Power restored. Steep turn. Stalled. Had stuck valve. Blown gasket

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.