ASN Wikibase Occurrence # 287130
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 7 March 2009 |
| Time: | 17:50 LT |
| Type: |  Cessna 172R |
| Owner/operator: | Private |
| Registration: | N2478B |
| MSN: | 17281027 |
| Year of manufacture: | 2001 |
| Total airframe hrs: | 3124 hours |
| Engine model: | Lycoming IO-360-L2A |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Oceanside, California -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Santa Ana-John Wayne International Airport, CA (SNA/KSNA) |
| San Diego-Montgomery-Gibbs Executive Airport, CA (MYF/KMYF) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot made an off-airport forced landing following an in-flight loss of engine power. The No. 4 cylinder (left rear) fractured and separated circumferentially in the area where the head joins the barrel. Metallurgical examination identified a fatigue fracture primarily on the exhaust side of the cylinder head, perpendicular to the axis of the barrel. Its inner edge abutted the crest of the first thread on the barrel. Engine Components, Inc. (ECi), manufactured the cylinder. ECi issued Mandatory Service Bulletin (MSB) No.08-1, Revision 3, dated August 19, 2008. It stated that the purpose of the MSB was to alert their customers about possible fatigue cracking and head separations on a specified group of replacement cylinders for Lycoming parallel valve engines. Cylinders identified by specific serial number ranges were to be inspected and pressure tested or inspected and replaced at specified reduced life limits. On October 20, 2008, Federal Aviation Administration (FAA) Airworthiness Directive (AD) 2008-19-05 became effective and mirrored ECi's MSB serial number range and corrective actions. The AD stated that the intent was to prevent loss of engine power due to cracks at the head-to-barrel interface in the cylinder assemblies and possible engine failure caused by separation of a cylinder head. The cylinders from the accident airplane had serial numbers that were outside of the range listed in the MSB and AD. The FAA has issued a Notice of Proposed Rule Making (NPRM) that would revise the serial numbers covered by the AD to encompass an expanded population of affected cylinders. ECi has a design change that is pending FAA approval.
Probable Cause: A total loss of engine power in flight due to the fatigue failure of the No. 4 cylinder.
Accident investigation:
 |
|
Sources:
NTSB WPR09LA145
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 04-Oct-2022 07:36 | ASN Update Bot | Added |
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