- Date
- February 18, 1988, 17:00 local (21:00 UTC)
- Place
- Oswego, NY
- Injuries
- 1 minor
- Damage
- Substantial damage
- Phase of flight
- Enroute
- Aircraft
- N6939MStinson 108
- Weather
- Visual (VMC) · Day
- Status
- Completed · report September 25, 1989
- Report
- Approved by Office Director
- FAA report
- 19880218002779A
- Case key
- 36103
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
During a local pleasure flight, a decrease in engine power was experienced and a puff of smoke observed in the cockpit. The pilot applied full power in an attempt to return to the airport, but realized it was not possible. The pilot put the aircraft down in an open snow covered field. During the landing roll of about 125 feet, the aircraft flipped over. The cause of the power loss was a broken connecting rod on the #5 cylinder and a nut on the rod end cap had come off.
Aircraft
- Registration
- N6939M
- Reported as
- Stinson 108
- Category
- Airplane
- Serial number
- 180-4939
- Airframe hours
- 1,178
- Engine
- Franklin 6A4-150, 150 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Operator
- Robert Lyman
- Registered owner
- Robert J Lyman
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Annual · June 6, 1987
- Departed
- NOO · Fulton, NY
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
- 57
- Certificate
- Student
- Medical
- Class 3, Valid Medical--w/ waivers/lim
- Seat
- Front
- Flight hours
- 100 total · 100 in this make and model · 61 as pilot in command · 11 in the last 90 days · 1 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 240° at 8 knots, gusting 8
- Visibility
- 15 statute miles
- Lowest ceiling
- None
- Temperature
- 39 °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.
Other investigations on N6939M · 1
Matched to the same aircraft by N-number and date.