ASN Wikibase Occurrence # 235667
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: | Saturday 2 May 2020 |
| Time: | 08:30 LT |
| Type: |  Cessna 172N Skyhawk |
| Owner/operator: | private |
| Registration: | N734NW |
| MSN: | 17268993 |
| Year of manufacture: | 1977 |
| Total airframe hrs: | 3515 hours |
| Engine model: | PZL Franklin 6A-350-C1R |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Fresno-Sierra Sky Park Airport , CA (E79) -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Private |
| Departure airport: | Fresno-Sierra Sky Park Airport , CA (E79) |
| Fresno-Sierra Sky Park Airport , CA (E79) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
Shortly after takeoff on runway 30, as the airplane reached about 300 to 400 ft above ground level, the engine lost partial power. The pilot prepared for a downwind landing to runway 12 and when he realized the airplane had excess energy, he deployed the flaps and performed a forward slip maneuver. The airplane touched down about halfway down the runway and continued off the end and through a fence. The airplane then passed over the two westbound lanes of a road and nosed over in the median.
Examination of the engine revealed low compression on two of the six cylinders (around 25 to 75 percent compression loss on cylinder numbers 3 and 5). The valve rocker arms were tapped with a rubber mallet and compression recovered to approximately 25 percent loss in the number 3 cylinder and 15 percent loss in the number 5 cylinder. An internal borescope examination of the engine cylinders revealed the piston tops and cylinder sidewalls appeared normal and no evidence of foreign object ingestion was observed. No other pre-impact mechanical anomalies were identified during the examination.
Although the reason for the low compression could not be determined, it was noted that the engine was disassembled 1.9 hours before the accident flight.
Probable Cause: The partial loss of engine power for reasons that could not be determined based on available evidence.
Accident investigation:
 |
|
Sources:
NTSB WPR20LA136
FAA register: https://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=734NW
https://flightaware.com/photos/view/2910788-a6ade78fb260ecba6e30f409232495c609dcf620/aircrafttype/C172
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 02-May-2020 19:15 | Geno | Added |
| 21-Jun-2021 07:18 | aaronwk | Updated [Time, Phase, Destination airport, Source, Narrative] |
| 24-Jun-2022 17:48 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative, Category, Accident report] |
| 24-Jun-2022 17:54 | harro | Updated [Operator, Location, 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