ASN Wikibase Occurrence # 284661
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| Date: | Tuesday 3 July 2007 |
| Time: | 14:00 LT |
| Type: |  Mooney M20E |
| Owner/operator: | |
| Registration: | N7837V |
| MSN: | 459 |
| Year of manufacture: | 1964 |
| Total airframe hrs: | 4117 hours |
| Engine model: | Lycoming IO-360-A1A |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Winnsboro, South Carolina -
 United States of America
|
| Phase: | Unknown |
| Nature: | Training |
| Departure airport: | Columbia Metropolitan Airport, SC (CAE/KCAE) |
| Winnsboro-Fairfield County Airport, SC (KFDW) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
A certified flight instructor (CFI) was flying with a commercial pilot who was receiving dual flight instruction towards a flight instructor certificate. After practicing a simulated engine failure, the airplane was in cruise flight at an altitude of 2,200 feet msl, when the engine rpm suddenly dropped to 800 rpm. The CFI was not able to restore engine power, and performed a forced landing to a field. During the landing, the airplane's left wing struck a tree stump and was substantially damaged. During a post-accident test run, the engine ran rough, with intermittent surges. After the fuel injector servo was removed and a replacement installed, the engine ran smoothly through 2,500 rpm. Subsequent examination of the fuel injector servo revealed that the fuel inlet screen had more than 50 percent of its exterior surface covered in light brown corrosion/contamination, and two-thirds of the inlet fitting was blocked by debris. In addition, contamination was noted throughout the fuel servo. The airplane had been operated for about 5 hours since its most recent annual inspection, which was performed about 3 months prior to the accident. The airplane manufacture's annual inspection guidelines included inspecting the fuel injection system, and cleaning the screens per the engine manufacturer's recommendations.
Probable Cause: A loss of engine power due to contamination within the fuel injector servo, which was not detected during a recent inadequate annual inspection.
Accident investigation:
 |
|
Sources:
NTSB NYC07LA157
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 01-Oct-2022 05:47 | ASN Update Bot | Added |
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