ASN Wikibase Occurrence # 146696
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information.
If you feel this information is incomplete or incorrect, you can submit corrected information.
| Date: | Tuesday 10 July 2012 |
| Time: | 12:45 |
| Type: |  Cessna 172M Skyhawk |
| Owner/operator: | Private |
| Registration: | N12504 |
| MSN: | 17262027 |
| Year of manufacture: | 1973 |
| Total airframe hrs: | 2508 hours |
| Engine model: | Lycoming O-320 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | South Wayne in Lafayette County WI -
 United States of America
|
| Phase: | Landing |
| Nature: | Private |
| Departure airport: | Kokomo, IN (OKK) |
| St. Paul, MN (SGS) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that, after about 2 hours 20 minutes of uneventful flight and while cruising at 4,500 ft mean sea level, the engine rpm decreased. He applied carburetor heat, and, about 2 minutes later, the engine rpm decreased to about 1,500, the oil pressure dropped to 0, and the propeller stopped. The oil temperature indicator in the cockpit was in the normal range. The pilot chose to execute a forced landing in a soybean field since an airport was not within glide distance. Upon touchdown in the field, the airplane flipped over and then came to rest inverted.
Examination of the airplane wreckage revealed that a sufficient quantity of oil (about 5 quarts) was present in the engine and that the lubrication system was intact and appeared to be in compliance with applicable airworthiness directives. However, two pieces of foreign plasticlike material, which were about 1/4 inch by 3/8 inch and 1/4 inch by 5/16 inch, respectively, were found lodged in the oil sump screen. The debris likely blocked oil distribution to the engine, which resulted in oil starvation and the subsequent connecting rod failure. It could not be determined how the debris got into the oil system; the exact source of the debris also could not be determined.
Probable Cause: Internal engine component failures, which resulted from oil starvation due to debris in the oil system.
Accident investigation:
 |
|
Sources:
NTSB
FAA register: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=5478T
Location
Images:
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 11-Jul-2012 15:52 | Geno | Added |
| 23-Mar-2015 18:26 | Razmith | Updated [Aircraft type, Registration, Cn, Location, Narrative, Photo, ] |
| 24-Mar-2015 20:59 | Rick | Updated [Cn, Location, Departure airport, Destination airport, Narrative] |
| 21-Dec-2016 19:28 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 27-Nov-2017 20:57 | ASN Update Bot | Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative] |
Corrections or additions? ... Edit this accident description
The Aviation Safety Network is an exclusive service provided by:
Quick Links:
| ASN Home | Send Correction / Feedback |
| FSF Home | Disclaimer | Copyright |
| Contact Us | Privacy Policy |
| Press / Media |
CONNECT WITH US:
©2024 Flight Safety Foundation