ASN logo
ASN Wikibase Occurrence # 141772
Last updated: 28 August 2019
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information. If you feel this information is incomplete or incorrect, you can submit corrected information.

Date:08-JAN-2012
Time:11:30
Type:Silhouette image of generic FB1A model; specific model in this crash may look slightly different
Bowers Fly Baby 1A
Owner/operator:Private
Registration: N4626
C/n / msn: 71-28
Fatalities:Fatalities: 1 / Occupants: 1
Aircraft damage: Written off (damaged beyond repair)
Category:Accident
Location:Jackson County Airport - 19A, GA -   United States of America
Phase: Take off
Nature:Private
Departure airport:Jefferson, GA (19A)
Destination airport:Jefferson, GA (19A)
Investigating agency: NTSB
Narrative:
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 magnetoís 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 pilotís 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 mechanicís failure to detect the missing magneto rotor cotter pins during the last engine overhaul.

Sources:

NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20120109X64751&key=1


Revision history:

Date/timeContributorUpdates
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]

Corrections or additions? ... Edit this accident description