ASN Wikibase Occurrence # 66380
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Date: | Sunday 12 July 2009 |
Time: | 12:45 |
Type: | Cessna 172N Skyhawk |
Owner/operator: | New England Flight Operations Llc |
Registration: | N4773G |
MSN: | 17273342 |
Total airframe hrs: | 5385 hours |
Engine model: | Lycoming O-320-H2AD |
Fatalities: | Fatalities: 0 / Occupants: 4 |
Aircraft damage: | Substantial |
Category: | Accident |
Location: | Great Bear Farms, Rochester, MA -
United States of America
|
Phase: | En route |
Nature: | Private |
Departure airport: | Nashua, NH (ASH) |
Destination airport: | Vineyard Haven, MA (MVY) |
Investigating agency: | NTSB |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative:The pilot reported that the airplane was in cruise flight when the engine developed sporadic engine vibrations. Manipulation of the carburetor heat and mixture controls did not remedy the situation and the engine subsequently developed a severe vibration. The pilot then elected to reduce engine power and perform a precautionary landing to a field. The airplane touched down in a cranberry bog, and sustained substantial firewall and airframe damage. Examination of the wreckage did not reveal any mechanical malfunctions. It was noted that the No. 2 cylinder lower spark plug was fouled and that the compression on the No. 4 cylinder was lower than that of cylinders 1, 2 and 3; however, the reason for the severe engine vibration could not be determined. The airplane had been operated for approximately 74 hours since its most recent 100 hour inspection, which was performed about two months prior to the accident.
Probable Cause: An engine vibration as reported by the pilot, for undetermined reasons.
Accident investigation:
|
| |
Investigating agency: | NTSB |
Report number: | ERA09LA399 |
Status: | Investigation completed |
Duration: | 9 months |
Download report: | Final report |
|
Sources:
NTSB
Location
Revision history:
Date/time | Contributor | Updates |
12-Jul-2009 23:54 |
slowkid |
Added |
13-Jul-2009 21:24 |
Anon. |
Updated |
13-Jul-2009 23:45 |
slowkid |
Updated |
21-Dec-2016 19:25 |
ASN Update Bot |
Updated [Time, Damage, Category, Investigating agency] |
02-Dec-2017 15:49 |
ASN Update Bot |
Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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