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ASN Wikibase Occurrence # 19539
Last updated: 4 July 2020
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Type:Silhouette image of generic C150 model; specific model in this crash may look slightly different
Cessna 150L
Registration: N1364Q
C/n / msn: 15072664
Fatalities:Fatalities: 0 / Occupants: 2
Aircraft damage: Substantial
Location:Columbia Airport, COlumbia, CA -   United States of America
Phase: Initial climb
Departure airport:Columbia, CA (O22)
Destination airport:
Investigating agency: NTSB
The flight instructor reported that the student pilot had recently purchased the airplane and that they intended to test fly it within the traffic pattern. Prior to departure, he noted that the wind was about 10-15 knots and favored a 2,600-foot-long turf runway. The instructor stated that he initiated a short field takeoff by holding the brakes, using 10 degrees of flaps, and applying full throttle. He recalled that the engine only produced 2,050 rpm, and that he expected the rpm to increase as he released the brakes. During the takeoff roll, the instructor felt that the tall grass slowed the acceleration of the airplane before it lifted off the ground at 55 miles per hour. He lowered the nose to gain airspeed in ground effect, but the airplane was not accelerating. Due to upward sloping terrain with trees and power lines in the flight path of the airplane, he turned left to avoid the obstacles. During the turn, the angle of bank increased due to a wind gust and the airplane stalled, entered a spin to the left, and impacted the ground in a nose low attitude. Examination of the airframe revealed no anomalies. Examination of the engine revealed that the number two cylinder top and bottom spark plugs were fouled with carbon deposits. These spark plugs would not have fired, resulting in a loss of power from the number two cylinder. The aircraft owner's manual states that during the initial takeoff phase the pilot should verify full throttle operation and that the engine should run smoothly and turn approximately 2,500 to 2,600 rpm with carburetor heat off.
Probable Cause: The flight instructor's decision to attempt takeoff with an engine discrepancy and subsequent failure to abort takeoff when the airplane did not attain adequate airspeed during the initial climb, resulting in an aerodynamic stall. Contributing to the accident was the partial loss of engine power.



Revision history:

18-May-2008 09:54 Fusko Added
21-Dec-2016 19:14 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
21-Dec-2016 19:16 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
21-Dec-2016 19:20 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
03-Dec-2017 10:43 ASN Update Bot Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative]

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