Accident Bowers Fly Baby 1A N4626, Sunday 8 January 2012
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Date:Sunday 8 January 2012
Type:Silhouette image of generic FB1A model; specific model in this crash may look slightly different    
Bowers Fly Baby 1A
Registration: N4626
MSN: 71-28
Engine model:Continental C85 SERIES
Fatalities:Fatalities: 1 / Occupants: 1
Other fatalities:0
Aircraft damage: Destroyed
Location:Jackson County Airport - 19A, GA -   United States of America
Phase: Take off
Departure airport:Jefferson, GA (19A)
Destination airport:Jefferson, GA (19A)
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
The airplane was about 200 feet above ground level when it stalled, spun about one-half turn to the right, impacted the ground in a nose down attitude, and burned. A witness reported that the pilot was attempting to diagnose an engine problem prior to departure. The witness also said that the engine was running rough and backfiring. A postaccident examination revealed that the right magneto distributor gear was unsecured inside the housing, and galling signatures were present. The galling signatures were consistent with damage found after the gear became loose while the engine was under power. Since limited maintenance records were available, it could not be determined how many flight hours had accumulated since the last engine overhaul; however, it is probable that the cotter pin was not installed in either magneto rotor drive shaft and that the right magneto’s castellated nut came loose during engine operation. It is probable that the unsecured distributor gear reduced engine performance, which resulted in a partial loss of engine power. The probability also exists that, at the time of the accident, the airplane was being operated in conditions conducive to serious carburetor icing at cruise power; however, the investigation could not conclusively determine that carburetor icing occurred.
Probable Cause: The pilot’s failure to maintain airplane control which resulted in an aerodynamic stall and spin. Also causal was the partial loss of engine power during the initial climb due to the improper installation of a magneto. Contributing to the accident was the pilot's decision to take off with an engine problem and the mechanic’s failure to detect the missing magneto rotor cotter pins during the last engine overhaul.

Accident investigation:
Investigating agency: NTSB
Report number: ERA12LA141
Status: Investigation completed
Duration: 1 year and 3 months
Download report: Final report




Revision history:

08-Jan-2012 12:15 gerard57 Added
08-Jan-2012 15:08 RobertMB Updated [Time, Aircraft type, Registration, Cn, Location, Nature, Departure airport, Destination airport, Source, Narrative]
19-Jan-2012 09:46 Geno Updated [Time, Source, Narrative]
19-Jan-2012 17:52 Dr. John Smith Updated [Source, Narrative]
21-Dec-2016 19:26 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
27-Nov-2017 17:53 ASN Update Bot Updated [Other fatalities, Nature, Departure airport, Destination airport, Source, Narrative]

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