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ASN Wikibase Occurrence # 137273
Last updated: 25 October 2020
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Date:05-JUL-2011
Time:19:00
Type:Silhouette image of generic C82R model; specific model in this crash may look slightly different
Cessna R182 Skylane RG
Owner/operator:Private
Registration: N7392X
C/n / msn: R18200096
Fatalities:Fatalities: 0 / Occupants: 2
Aircraft damage: Substantial
Category:Accident
Location:Summit Valley Road, near Hesperia, California -   United States of America
Phase: Approach
Nature:Private
Departure airport:Hesperia, CA (L26)
Destination airport:Adelanto, CA (52CL)
Investigating agency: NTSB
Narrative:
The airplane's engine stopped making sufficient power to maintain a climb, so the pilot decided to turn back toward the airport. However, after he flew into a valley, he realized that the airplane would not make it back to the airport. After seeing power lines along the airplane’s flightpath, he turned the airplane toward an open field. The airplane subsequently hit the ground hard and then hit a tree, which separated the right wing from the airframe. During the postaccident engine examination, the muffler was disassembled. One internal baffle cone was found separated from the end plate and was blocking the opening of the muffler. Upon shaking the muffler, the baffle cone was free to move around within the muffler assembly. The other baffle cone had a hole eroded in its center. Internal engine failures can cause partial or complete engine power loss by restricting the flow of the exhaust gases. If pieces of the internal baffling break loose and partially or totally block the flow of exhaust gases, an engine failure can occur. It is likely the exhaust gas was partially or totally blocked by the separated baffle cone during the flight, which resulted in a loss of engine power.
Probable Cause: The separation of the end baffle cone inside the muffler, which blocked airflow through the engine after takeoff and resulted in a loss of engine power and an off-airport landing into obstacles.

Sources:

NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20110705X34957&key=1


Images:


Revision history:

Date/timeContributorUpdates
06-Jul-2011 01:54 gerard57 Added
06-Jul-2011 02:58 RobertMB Updated [Time, Aircraft type, Registration, Cn, Operator, Location, Source, Damage, Narrative]
04-Aug-2011 02:10 shell0406 Updated [Operator, Phase, Nature, Narrative]
12-Sep-2011 13:20 harro Updated [Time, Operator, Phase, Nature, Departure airport, Destination airport, Narrative]
21-Dec-2016 19:26 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
27-Nov-2017 17:01 ASN Update Bot Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative]

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