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ASN Wikibase Occurrence # 36793
Last updated: 7 January 2020
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Type:Silhouette image of generic C177 model; specific model in this crash may look slightly different
Cessna 177B
Owner/operator:Aero Haven Inc.
Registration: N19113
C/n / msn: 17702558
Fatalities:Fatalities: 2 / Occupants: 3
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Location:Tusayan, AZ -   United States of America
Phase: Unknown
Departure airport:Grand Canyon, AZ (GCN)
Destination airport:Big Bear, CA (L35)
Investigating agency: NTSB
The cross-country flight departed Big Bear, California, with stops in Las Vegas, Nevada, Grand Canyon, Arizona, and returning to Big Bear. The accident departure from Grand Canyon National Park Airport was performed on runway 03; an 8,999-foot runway with a 0.8 percent up gradient (76-foot increase), and a density altitude of 8,800 feet msl. Witnesses reported that the airplane appeared to be slow, and barely cleared trees and buildings while climbing into mildly rising terrain. About 2 miles from the runway, the airplane was seen to roll to the left and descended into trees. The FAA Approved Flight Manual (AFM) for the accident airplane/performance data was not found at the accident site; however, a Cessna 337 Skymaster AFM was found. A California Airport Directory was also recovered. No Grand Canyon Airport information was found at the site other than the Las Vegas Sectional Chart airport information. Examination of the dual magneto revealed internal case corrosion on the left interior of the magneto. The right magneto was timed 22 degrees BTC instead of 25 degrees BTC. Test bench results indicated that the right magneto exhibited a weak spark. The massive electrode spark plugs exhibited a gap in excess of the recommended maximum gap for the plug. Cylinder plugs No. 1 and 2 were fuel sooted, No. 3 appeared lean, and No. 4 was slightly sooted.

Probable Cause: was the pilot's failure to have available and consult the FAA approved flight manual for performance data and, the high density altitude. Contributing to the accident were the dual magneto and spark plug system issues affecting optimum engine performance.



Revision history:

24-Oct-2008 10:30 ASN archive Added
21-Dec-2016 19:23 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
14-Dec-2017 08:46 ASN Update Bot Updated [Operator, Source, Narrative]

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