ASN Wikibase Occurrence # 285132
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| Date: | Saturday 24 March 2007 |
| Time: | 10:15 LT |
| Type: |  Piper PA-28-140 |
| Owner/operator: | |
| Registration: | N56124 |
| MSN: | 28-7325577 |
| Year of manufacture: | 1973 |
| Total airframe hrs: | 2467 hours |
| Engine model: | Lycoming O-320 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Catherine Twp., Pennsylvania -
 United States of America
|
| Phase: | Unknown |
| Nature: | Private |
| Departure airport: | Selinsgrove-Penn Valley Airport, PA (SEG/KSEG) |
| Ebensburg, PA (9G8) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
Between 30 minutes to 1 hour into the visual flight rules flight, the pilot reported that the engine began to "run rough." The pilot applied carburetor heat, but that only made the roughness worse, so after about one minute, he turned the carburetor heat back off. The pilot then decided to "take emergency action," and performed a forced landing to the top of a nearby mountain. The weather conditions reported about 17 nautical miles west of the accident site, which was also located between the accident site and the destination airport, were well below the minimums for VFR flight. Additionally, when asked about the weather in-flight the pilot stated that there was at least 1-mile visibility, and that he stayed clear of the clouds, as he was in "class G" airspace. Interpolation of a carburetor icing probability chart revealed that the atmospheric conditions were conducive to "moderate icing" at cruise power or "serious icing" at glide power. An FAA publication provided pilots with warning signs of, and solutions to carburetor icing. The publication warned that a loss of engine rpm in airplanes equipped with a fixed pitch propeller is one sign that carburetor ice may be present. In order to counteract carburetor icing, the pilot should apply full carburetor heat immediately. The publication noted that the engine "may run rough initially for a short time while ice melts."
Probable Cause: The pilot's improper use of carburetor heat. Contributing to the accident were the weather conditions conducive to the formation of carburetor ice.
Accident investigation:
 |
|
Sources:
NTSB NYC07LA085
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 01-Oct-2022 18:12 | ASN Update Bot | Added |
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