BEECH 76 near Glendale, AZ — 2009-07-30
- Date
- 2009-07-30
- Location
- Glendale, AZ, USA
- Airport
- GEU
- Aircraft
- BEECH 76
- Registration
- N83ER
- Category
- Airplane
- Highest injury
- None
- Fatalities
- 0
- Phase of flight
- Taxi
Probable cause
The fatigue failure of the left main landing gear enhanced side brace assembly.
NTSB narrative
The flight instructor reported that the landing gear warning horn went off while taxiing to the ramp at the conclusion of the instructional flight. After checking that the landing gear handle was down and bringing the airplane to a complete stop, the left main landing gear collapsed, which resulted in substantial damage to the left wing. A subsequent examination of the left main landing gear system revealed that the side frame assembly was the latest enhanced version and had failed as a result of fatigue, consistent with the stresses developed from the bending moments applied to the down tube during the normal extension and retraction of the main landing gear, as well as during takeoff, landing, and taxiing. A search of the relevant data bases disclosed no other reports of similar failures in the new enhanced version of the part.
Analysis
- Primary failure mode
- Mechanical failure
- First missed decision gate
- Check landing gear system before taxiing to prevent collapse.
NTSB coding
Evidence available
- 4 docket documents