Tecnam P2002 JF - Page 550

Page 101 2
nd
Edition – Rev 0
32-20
BRAKE SYSTEM – TROUBLESHOOTING
ATA 32-20 Troubleshooting
Trouble
Likely cause
Action required
Piston does not retract.
Bleed system and/or
remove piston. Inspect for
damage
Warped pressure plate.
Replace pressure plate or
flatten to within 0.010 inch
(0.254 mm).
Corroded anchor bolts
and/or torque plate
bushings.
Clean and lubricate or
replace.
Cocked anchor bolts and/or
torque plate bushings.
Replace.
Bent/cracked torque plate.
Replace.
Warped brake disc - can be
checked by laying a
straightedge across disc
face.
Replace and use caution
during operation to prevent
excessive energy input into
brake
Out of position/stuck
lining.
Repair/replace.
Restriction in hydraulic
line.
Isolate and remove
restriction.
Lining not firmly seated
flush against pressure/back
plate.
Debur rivet hole on surface
adjacent to lining.
Rapid disc and lining wear.
Dragging brakes.
Refer to “Brake drag”
troubleshooting section
Improper conditioning of
brake linings.
See on-aircraft inspection
section for lining
conditioning checking
procedure
Excessive rusting, scoring,
or pitting of brake disc
Clean or replace disc.
Excessive back plate
deflection caused by bent
bolts or over torquing bolts.
Check and replace bolts.
Apply suitable torque
Incorrect lining and/or disc.
Replace with correct parts.
Brakes won’t hold.
Contaminated lining.
Replace lining.
Improper conditioning of
brake linings.
See on-aircraft inspection
section for lining
conditioning checking
procedure
Lining worn below
minimum wear limits.
Replace lining.