ASN Wikibase Occurrence # 216377
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| Date: | Thursday 18 October 2018 |
| Time: | 10:57 |
| Type: |  Cessna 172S Skyhawk |
| Owner/operator: | Liberty University |
| Registration: | N924MM |
| MSN: | 172S11056 |
| Year of manufacture: | 2010 |
| Total airframe hrs: | 3592 hours |
| Engine model: | Lycoming IO-360-L2A |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Lynchburg Regional Airport (KLYH), Lynchburg, VA -
 United States of America
|
| Phase: | Take off |
| Nature: | Training |
| Departure airport: | Lynchburg, VA (LYH) |
| Lynchburg, VA (LYH) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The flight instructor reported that, shortly after the student pilot conducted the takeoff for the instructional flight, they felt the engine vibrate and the airplane shudder. They then noticed that the rpm had decreased and that the engine's performance had degraded. The instructor took the controls and lowered the nose to prevent a stall. He attempted to land on the intersecting runway, and the airplane touched down with about 100 ft of runway remaining. Realizing that the airplane could not be stopped within the remaining runway, the instructor steered the airplane right to avoid a steep drop-off past the runway end. The airplane subsequently impacted a ditch and then came to rest in grass in a nose-down position. The left wing sustained substantial damage.
Postaccident examination of the engine revealed that the No. 2 cylinder exhaust valve was stuck open. Given this evidence, it is likely that the stuck exhaust valve resulted in the partial loss of engine power.
Probable Cause: The stuck No. 2 cylinder exhaust valve, which resulted in a partial loss of engine power and a subsequent forced landing and impact with a ditch.
Accident investigation:
 |
|
Sources:
NTSB
FAA register: https://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=924MM%20
https://flightaware.com/photos/view/769474-8785a0179f36cd7654443b9a85af3c998b206d2e/aircrafttype/C172
Location
Media:
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 18-Oct-2018 16:31 | Geno | Added |
| 19-Oct-2018 07:36 | Iceman 29 | Updated [Nature, Embed code] |
| 19-Oct-2018 18:34 | Geno | Updated [Aircraft type, Registration, Cn, Source, Embed code] |
| 01-Feb-2020 15:44 | Anon. | Updated [Total occupants, Departure airport] |
| 01-Feb-2020 15:45 | harro | Updated [Destination airport, Narrative] |
| 19-Apr-2020 07:00 | ASN Update Bot | Updated [Time, Operator, Departure airport, Destination airport, Source, Embed code, Narrative, Accident report, ] |
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