Service difficulty report · Brake Rotor · Doug DC932

Difficulty date
October 6, 1997
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N17543
Make and model
Doug DC932
Aircraft serial
45789
System (JASC)
3242 · Brake
Part
Brake Rotor
Part number
95607887
Condition
Broken
Location
Lt Mlg
Stage of operation
TX
Nature of condition
O
Precautionary procedure
K

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

What was found

THE LT MLG BRAKE BEGAN TO DRAG DURING TAXI TO GATE IN TUL. THE FUSE PLUG BLEW AND THE LEFT TIRE (LEFT OUTBOARD MAIN) DEFLATED. MAINTENANCE FOUND THE LEFT BRAKE HAD FAILED AND THE LEFT AXLE OVERHEATED. THE LT MLG SHOCK STRUT PISTON WAS REMOVED AND REPLACED IAW MM 32-11-2, PAGE 401-405. THE NR 1 AND NR 2 BRAKE ASSEMBLIES WERE REMOVED AND REPLACED. IN ADDITION, THE NR 1 AND NR 2 ANTI-SKID TRANSDUCERS AND NR 1 AND NR 2 MAIN TIRE AND WHEEL ASSEMBLIES WERE REMOVED AND REPLACED. TEARDOWN REVEALED THAT A BRAKE ROTOR HAD BROKEN IN HALF DUE TO THERMAL CYCLIC FATIGUE AND HEAVY SHRINKAGE WAS FOUND IN THE OTHER ROTORS AND STATORS.

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