ASN Wikibase Occurrence # 296767
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| Date: | Friday 16 August 2002 |
| Time: | 21:15 LT |
| Type: |  Schweizer 300C |
| Owner/operator: | |
| Registration: | N269FW |
| MSN: | S1431 |
| Year of manufacture: | 1989 |
| Total airframe hrs: | 2683 hours |
| Engine model: | Lycoming HIO-360-DIA |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Haleyville, Alabama -
 United States of America
|
| Phase: | Unknown |
| Nature: | Private |
| Departure airport: | Tuscaloosa Regional Airport, AL (TCL/KTCL) |
| Russellville, AL (M22) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
During cruise flight, the helicopter lost engine power, and the pilot was unable to restore it. During the forced landing in the darkness, the pilot was unable to see the terrain, and the helicopter hit the ground hard. Examination of the engine revealed two lower screws of the No. 3 valve cover were missing. The attachment bolts of the intake pipes of both the No. 1 and No. 3 cylinder assemblies were found loose. The No. 3 intake pipe was found rotated approximately 180 degrees from the normally installed position. The gaskets normally installed under the intake pipe flanges of the No. 1 and No. 3 intake pipes were missing. The No. 1, No. 2, and No. 4 spark plugs were wet with fuel, and the No. 3 spark plug was dry and displayed tan-colored combustion deposits. A review of maintenance records revealed the engine had operated 38.2 hours since inspection.
Probable Cause: The failure of maintenance personnel to perform an adequate inspection of loose intake components, which resulted in a total loss of engine power and subsequent emergency descent, forced landing, and collision with terrain in dark night conditions.
Accident investigation:
 |
|
Sources:
NTSB ATL02LA159
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 14-Oct-2022 10:31 | ASN Update Bot | Added |
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