Service difficulty report · Stator · Cessna 550

Difficulty date
December 21, 2011
Submitted
January 6, 2012
Operation
General aviation
Aircraft
N26496
Make and model
Cessna 550
Aircraft serial
5500607
Engine
Pwa JT15D4
System (JASC)
3242 · Brake
Part
Stator
Part number
1338932
Condition
Cracked
Location
Mlg Brake Disk
Stage of operation
IN
How discovered
V
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

ON LANDING ROLLOUT, LT MAIN GEAR BRAKE LOCKED UP. UPON DISASSEMBLY AND INSP OF MALFUNCTIONING BRAKE BY MECHANIC, IT WAS DISCOVERED THAT THE STATOR DISK (1 OF THE 2 ON THE BRAKE ASSY) CLOSEST TO THE INBD SIDE HAD CRACKED AND SHATTERED INTO 4 LARGE SEGMENT PIECES. THE BROKEN PIECES OF THE DISK HAD JAMMED UP AND PREVENTED THE WHEEL FROM TURNING. SUSPECT FATIGUE OR THERMAL SHOCK COULD BE THE CAUSE OF FAILURE.

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