Service difficulty report · Bolt · Cessna 208B

Difficulty date
February 19, 2015
Submitted
February 20, 2015
Operation
Air carrier
Aircraft
N857FE
Make and model
Cessna 208B
Aircraft serial
208B0177
Aircraft time
11,641 hours, 13,418 cycles
Engine
Pwa PT6A114A
Engine time
3,516 hours, 4,208 cycles
Propeller
Mcauly 3GFR34C701
System (JASC)
3242 · Brake
Part
Bolt
Part number
06901900
Condition
Sheared
Location
Mlg Brake
Component
Brake Assembly · Cessna
Component part number
C1630301001
Stage of operation
LD
How discovered
O
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 RT BRAKE CALIPER UPPER ANCHOR BOLT SHEARED DURING BRAKING ACTION ON LANDING. THIS ALLOWED THE BRAKE CALIPER TO ROTATE AFT ABOUT THE AXIS OF THE LOWER ANCHOR BOLT & CONTACT THE INSIDE SIDEWALL OF THE MLG TIRE. APPLICATION OF RT BRAKE HAD NO AFFECT DUE TO THE PISTON PUSHING OUT OF THE CALIPER HOUSING LOOSING PRESS & HYD FLUID. THE ANCHOR BOLT SHEARED IN THE THREADED AREA ADJACENT TO THE NUT. HE REMAINING STUD MOVED OUTWARD THROUGH THE TORQUE PLATE & CONTACTED THE MAIN WHEEL TIE BOLTS DAMAGING THE HEADS OF BOLTS

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