Service difficulty report · Switch · Beech 100BEECH

Difficulty date
March 11, 2009
Submitted
April 9, 2009
Operation
General aviation
Make and model
Beech 100BEECH
Aircraft time
15,085 hours
Engine
Pwa PT6A28
Propeller
Hartzl HCB4TN3
Part
Switch
Part number
MS250261
Condition
Failed
Location
Te Flaps
Stage of operation
CL
How discovered
O
Nature of condition
B
Precautionary procedure
A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

(CAN) IN FLIGHT, THE FLAP UP SWITCH FAILED CAUSING THE FLAP MOTOR TO DRIVE THE FLAPS TO A MORE UP POSITION WHICH BURNED OUT THE FLAP MOTOR AND TWISTED THE FLAP ACTUATOR DRIVE CABLES. WE ARE REPLACING THE UP LIMIT SWITCH, FLAP ACTUATOR DRIVE CABLES, FLAP MOTOR AND GEARBOX AND 3 FLAP TRACKS WHICH ARE CLOSE TO THEIR MAX WEAR LIMITS. WE ARE INSPECTING THE FLAP ACTUATORS AND FLAP MOTOR CIRCUIT BREAKER.