- Date
- June 18, 1991, 13:40 local (20:40 UTC)
- Place
- Visalia, CA
- Injuries
- 2 minor
- Damage
- Substantial damage
- Phase of flight
- Enroute
- Aircraft
- N306ATGlasair SH-2-RG
- Weather
- Visual (VMC) · Day
- Status
- Completed · report May 7, 1993
- Report
- Approved by Office Director
- FAA report
- 19910618022369A
- Case key
- 27252
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
Total loss of engine power due to the failure of the number 4 engine exhaust valve.
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 certificated private pilot/owner stated that an hour and half into the flight the engine started to run rough and lost RPM. All instruments were in the green. He headed the aircraft for a suitable airport but the engine quit in the pattern. Due to winds he was unable to make the runway. Examination of the engine by FAA inspectors revealed that the number 4 cylinder exhaust valve failed.
Aircraft
- Registration
- N306AT
- Reported as
- Glasair SH-2-RG
- Category
- Airplane, amateur-built
- Serial number
- 306
- Engine
- Lycoming IO-360-A1B, 200 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Operator
- Frank R. Sigler
- Registered owner
- Frank R. Sigler
- Last inspection
- Unknown · January 2, 2000
- Departed
- L18 · Fallbrook, CA
- Destination
- TVL · Lake Tahoe, CA
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
- 63
- Certificate
- Private
- Airplane ratings
- Single-engine land
- Medical
- Class 3, Valid Medical--w/ waivers/lim
- Flight hours
- 1,330 total · 370 in this make and model · 1,330 as pilot in command · 16 in the last 90 days · 4 in the last 30 days · 1 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 310° at 20 knots
- Visibility
- 30 statute miles
- Lowest ceiling
- None
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.