- Date
- August 24, 1991, 20:50 local (Aug 25, 1991, 04:50 UTC)
- Place
- Coville Lake, AK
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Maneuvering
- Aircraft
- N73762Cessna T-207A
- Weather
- Visual (VMC) · Day
- Status
- Completed · report May 5, 1993
- Report
- Approved by Office Director
- NTSB office
- Alaska Regional Office
- FAA report
- 19910824036629A
- Case key
- 5609
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
A total failure of the power output shaft bolts due to fatigue. Contributing to the accident was the rough and uneven 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
After an emergency landing on a small lake, the airplane was substantially damaged and the pilot was not injured. Examination of the engine revealed the drive shaft had become disconnected from the engine during flight. Four of the five drive shaft coupling bolts failed due to fatigue.
Aircraft
- Registration
- N73762
- Reported as
- Cessna T-207A
- Category
- Airplane
- Serial number
- 624
- Airframe hours
- 1,708
- Engine
- Allison 250-C-205, 425 horsepower, turbo prop
- Damage
- Substantial damage
- Flight
- Business · Part 91
- Registered owner
- Katmailand, Inc.
- Airworthiness certificate
- Standard, Normal
- Last inspection
- 100 hour · July 28, 1991 · 61 hours before
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 45
- Certificates
- Commercial, Flight instructor
- Airplane ratings
- Single-engine land, Multi-engine land, Single-engine sea
- Instrument ratings
- Airplane
- Medical
- Class 2, Valid Medical--w/ waivers/lim
- Seat
- Left
- Flight hours
- 8,000 total · 900 in this make and model · 8,000 as pilot in command · 300 in the last 90 days · 100 in the last 30 days · 10 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 300° at 10 knots
- Visibility
- 10 statute miles
- Lowest ceiling
- None
- Temperature
- 64 °F
- Altimeter
- 30.00 inHg
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.