ASN Wikibase Occurrence # 179110
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: | Monday 28 June 2004 |
| Time: | 14:39 |
| Type: |  Socata TB20 Trinidad |
| Owner/operator: | Private |
| Registration: | N110U |
| MSN: | 595 |
| Total airframe hrs: | 1750 hours |
| Engine model: | Lycoming IO-540-C4D5D |
| Fatalities: | Fatalities: 0 / Occupants: 5 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | near Perris, California -
 United States of America
|
| Phase: | Landing |
| Nature: | Private |
| Departure airport: | Murrieta, CA (F70) |
| Reno, NV (RNO) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The airplane collided with ground obstructions during a forced landing following a catastrophic engine failure due to oil exhaustion during cruise flight. Just after achieving cruise altitude the pilot was scanning the cockpit gauges and he noticed the oil pressure gauge indicating a loss of pressure, with the oil warning light flickering intermittently. About 5 minutes later, the engine started to vibrate, and subsequently seized, making a loud bang. The airplane began to descend about 1,000 feet per minute, and the pilot selected a dirt field to perform an emergency landing. During the landing roll, the airplane impacted a berm. An engine examination revealed that the inside top of the engine cowling showed a concentration of oil near the firewall on the left side, which is the approximate location of the vacuum pump. Removal of the vacuum pump revealed an oily film on both sides of the pump gasket, which is seated between the vacuum pump flange and the engine accessory case flange. The vacuum pump had been installed about 0.5 hours prior to the accident. The mechanic who installed the pump said he used the gasket that was supplied with the pump. The manufacturer of the vacuum pump reported that they supply a gasket (part number AS3491-01) with their pump. In the TB-20 parts manual, the airplane manufacturer specifies that the gasket required is part number Z00.N7423254013, which they cross-reference with Textron Lycoming part number 8313. The investigation was unable to cross-reference or establish an equivalency between the AS3491-01 gasket supplied by the pump manufacturer with either the Lycoming or Socata specified gasket.
Probable Cause: A loss of engine power due to oil exhaustion as a result of the mechanic's use of an incorrect gasket during the installation of the vacuum pump.
Accident investigation:
 |
|
Sources:
NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20040708X00929&key=1
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 29-Aug-2015 17:19 | Noro | Added |
| 21-Dec-2016 19:30 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 07-Dec-2017 18:04 | ASN Update Bot | Updated [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