- Date
- July 31, 1986, 09:20 local (14:20 UTC)
- Place
- Bartlesville, OK
- Injuries
- 1 minor
- Damage
- Substantial damage
- Phase of flight
- Enroute
- Aircraft
- N50101Cessna 150H
- Weather
- Visual (VMC) · Day
- Status
- Completed
- Report
- Approved by Office Director
- FAA report
- 19860731036729A
- Case key
- 22068
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Sequence of events
NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.
Analysis
The plt took off on a test flt after an annual inspn of the acft & a top overhaul of the eng had been completed. While climbing thru about 1200 to 1300 ft AGL, the eng started running rough, then quit. The plt attempted to return to the arpt, but was unable. Subsequently, she landed the acft in an area of dense brush & trees. An inv revealed that the rocker arm support structure on the #3 cylinder had failed, releasing the rocker arm shaft & both rocker arms. Teardown of the eng revealed that the #3 exhaust valve guide was an incorrect part & was oversize in length by 0.165 inch. The oversize guide would not allow full valve movement & the residual movement resulted in failure of the rocker arm support structure.
Aircraft
- Registration
- N50101
- Reported as
- Cessna 150H
- Category
- Airplane
- Serial number
- 15069063
- Airframe hours
- 4,343
- Engine
- Continental O-200-A, 100 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Part 91
- Registered owner
- Jean F. Cox
- Airworthiness certificate
- Standard, Utility; Standard, Normal
- Last inspection
- Annual · July 31, 1986
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 67
- Certificate
- Private
- Airplane ratings
- Single-engine land
- Medical
- Class 1, Valid Medical--w/ waivers/lim
- Seat
- Left
- Flight hours
- 357 total · 80 in this make and model · 254 as pilot in command · 8 in the last 90 days
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 360° at 10 knots
- Visibility
- 5 statute miles
- Lowest ceiling
- 2,000 ft broken
- Temperature
- 88 °F, dew point 73 °F
- Altimeter
- 29.00 inHg
- Observed at
- BVO, 1 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.