- Date
- July 28, 1991, 15:50 local (19:50 UTC)
- Place
- Williamstown, MA
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Enroute
- Aircraft
- N7690RBeech C-23
- Weather
- Visual (VMC) · Day
- Status
- Completed · report April 27, 1993
- Report
- Approved by Office Director
- FAA report
- 19910728030229A
- Case key
- 36974
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
Engine failure as a result of improper engine overhaul performed by other maintenance personnel. A factor was the lack of suitable terrain.
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
A 200 hour private pilot experienced a complete loss of engine power while in cruise flight at 3,000 feet. The engine failure was the result of the crankshaft gear retaining bolt backing out resulting in the disengagement of the crankshaft. The engine had recently been overhauled, but the manufacturer's service instructions were not complied with at the time of the engine overhaul. Suitable terrain was not available to the pilot to execute a successful forced landing.
Aircraft
- Registration
- N7690R
- Reported as
- Beech C-23
- Category
- Airplane
- Serial number
- M1290
- Airframe hours
- 2,096
- Engine
- Lycoming O-360-A2G, 180 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Operator
- David J. Stoddard
- Registered owner
- David J. Stoddard
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Annual · June 16, 1991 · 20 hours before
- Departed
- 5BE · Bennington, VT
- Destination
- GBR · Gt. Barrington, MA
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
- 50
- Certificate
- Private
- Airplane ratings
- Single-engine land
- Medical
- Class 3, Valid Medical--w/ waivers/lim
- Seat
- Left
- Flight hours
- 206 total · 20 in this make and model · 136 as pilot in command · 20 in the last 90 days · 13 in the last 30 days · 4 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- Calm
- Visibility
- 20 statute miles
- Lowest ceiling
- None
- Temperature
- 81 °F
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.