- Date
- September 9, 1992, 16:30 local (Sep 10, 1992, 00:30 UTC)
- Place
- Bethel, AK
- Injuries
- 2 uninjured
- Damage
- Substantial damage
- Phase of flight
- Enroute
- Aircraft
- N7763FCessna 150
- Weather
- Visual (VMC) · Day
- Status
- Completed · report May 26, 1993
- Report
- Approved by Office Director
- NTSB office
- Alaska Regional Office
- FAA report
- 19920909040609A
- Case key
- 5806
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 carburetor icing conditions and the delay by the pilot in command/cfi in using carburetor heat.
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 pilot in command/flight instructor reported that the engine began to run rough about two hours into the flight. Full carburetor heat was applied and the roughness disappeared. About 30 minutes later, the engine roughness reappeared. Engine instrument indications were normal. The engine coughed and sputtered, but little fluctuation in RPM was noted. Full carburetor heat was once again applied but the engine quit and attempts at restarting were not successful. The engine started and ran normally (restricted to low RPM due to motor mount damage) during a post accident static examination and operational check. All engine controls were intact. No foreign material/contaminants was found in the wing tanks, engine fuel strainer, and carburetor finger screen. The temperature/dew point at the time of the accident was 44 deg and 30 deg respectively. According to the carb icing prob chart serious icing at cruise power was possible at the ambient conditions.
Aircraft
- Registration
- N7763F
- Reported as
- Cessna 150
- Category
- Airplane
- Serial number
- 150 63863
- Airframe hours
- 4,662
- Engine
- Continental O-200-A, 100 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Instructional · Part 91
- Operator
- Hugh T. Youngers
- Registered owner
- William T. O Brien
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Annual · July 9, 1992 · 42 hours before
- Departed
- Port Alsworth, AK
- 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
- 27
- Certificates
- Commercial, Flight instructor
- Airplane ratings
- Single-engine land, Multi-engine land
- Instrument ratings
- Airplane
- Medical
- Class 1, Valid Medical--no waivers/lim.
- Seat
- Right
- Flight hours
- 1,430 total · 300 in this make and model · 1,398 as pilot in command · 120 in the last 90 days · 25 in the last 30 days · 4 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 330° at 12 knots
- Visibility
- 30 statute miles
- Lowest ceiling
- 8,500 ft broken
- Temperature
- 45 °F, dew point 30 °F
- Altimeter
- 30.00 inHg
- Observed at
- BET, 40 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.