- Date
- October 8, 1991, 12:20 local (17:20 UTC)
- Place
- Marion, WI
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Enroute
- Aircraft
- N704CWCessna 150M
- Weather
- Visual (VMC) · Day
- Status
- Completed · report December 14, 1992
- Report
- Approved by Office Director
- FAA report
- 19911008045479A
- Case key
- 15329
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Probable cause
The failure of the exhaust and intake valves. Factors contributing to the accident were downhill terrain and a collapsed nosegear.
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 student pilot was flying a single engine airplane on a solo cross country flight when the engine began to run rough. The engine lost approximately 25 percent of the original power setting. The airplane would not maintain altitude and was, according to the pilot, 'vibrating very badly.' The pilot chose a field which he believed smooth and level. Upon touchdown the airplane rolled down hill and nosed over at the bottom of the hill after its nosegear collapsed. Inspection of the engine revealed failed intake and exhaust valves, and a piston with holes in its top. The airplane was operating under and auto gas STC which allowed the use of that fuel and any mixture combination of 100 ll aviation fuel.
Aircraft
- Registration
- N704CW
- Reported as
- Cessna 150M
- Category
- Airplane
- Serial number
- 15078515
- Engine
- Continental O-200 A, 100 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Instructional · Part 91
- Operator
- James H. Jahnke
- Registered owner
- James H. Jahnke
- Destination
- 92G · Pulaski, WI
- Flight plan
- VFR
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
- 37
- Certificate
- Student
- Medical
- Class 3, Valid Medical--w/ waivers/lim
- Flight hours
- 41 total · 41 in this make and model
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 220° at 13 knots
- Visibility
- 10 statute miles
- Lowest ceiling
- 1,700 ft broken
- Temperature
- -0 °F, dew point -0 °F
- Observed at
- GRB, 30 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.