Accident Maule M-7-260C N99KJ,
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ASN Wikibase Occurrence # 176142
 
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Date:Sunday 28 March 2004
Time:11:34
Type:Silhouette image of generic M6 model; specific model in this crash may look slightly different    
Maule M-7-260C
Owner/operator:Private
Registration: N99KJ
MSN: 30009C
Total airframe hrs:836 hours
Engine model:Lycoming IO-540
Fatalities:Fatalities: 0 / Occupants: 2
Aircraft damage: Substantial
Category:Accident
Location:Paso Robles, CA -   United States of America
Phase: Landing
Nature:Private
Departure airport:Paso Robles, CA
Destination airport:Santa Barbara, CA (SBA)
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
Narrative:
The airplane lost engine power during takeoff from a private airstrip and collided with the ground during the ensuing forced landing attempt. During the initial takeoff climb, approximately 1,000 feet above ground level, the engine sputtered. The pilot changed the fuel tank selector from the "BOTH" position to the "RIGHT" position and adjusted the mixture control. Partial power returned momentarily; shortly thereafter, the engine lost power again. During the forced landing on uneven terrain, the right wing impacted the ground. Post-accident examination revealed that the left muffler's exhaust stack was detached from the manifold. The exhaust stack is secured to the exhaust manifold outlet tube with a pin. This pin was eroded and no longer secured the two pieces together. Evidence of heat was found on the fuel lines and plastic tubing in the area of the exhaust stack. According to the AC 65-12A, vapor lock can be induced by high fuel temperatures and result in a partial or complete loss of power. A post-accident test run of the engine did not reveal any operating anomalies or malfunctions.
Probable Cause: fuel system vapor lock due to the failure of the left exhaust stack clamp pin, which caused a separation of the exhaust stack from the muffler and the porting of hot exhaust gases onto the fuel lines.

Accident investigation:
cover
  
Investigating agency: NTSB
Report number: LAX04LA171
Status: Investigation completed
Duration:
Download report: Final report

Sources:

NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20040331X00404&key=1

Location

Revision history:

Date/timeContributorUpdates
16-May-2015 14:13 Noro Added
21-Dec-2016 19:30 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
07-Dec-2017 17:49 ASN Update Bot Updated [Other fatalities, Departure airport, Destination airport, Source, Narrative]

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