Piper Navajo Chieftain PA-31-350 Service Manual page 419

NAVAJO CHIEFTAIN SERVICE MANUAL
TABLE VII-I. INSPECTION LIMITS (cont)
Part
(Refer to Figure 7-27.)
Defect
Remedy
Back Plate (5).
Cracks around relief
slot holes.
Replace.
Wear pads worn to
0.090 inch or less
in thickness from
face of pad to sur-
face of back plate;
or if pad width is
less than 2.75 inches,
as shown in Figure
7-27.
Plate dished in excess
of 0.015 inch.
Replace all pads.
Replace.
Bolts (3).
Thread damage, cracks
under head and in threads
adjacent to bolt shank
and bent bolts.
Replace.
Insulators (9).
Small blisters not ex-
ceeding 0.010 inch.
Grind OFF.
Worn to 0.385 inch or
less in thickness.
BRAKE PARTS TOLERANCES
Replace.
PARTS NEW
STATIONARY DISC
ROTATING DISC
INSULATORS
PRESSURE PLATE ASSY.
BACK PLATE ASSY.
.156
.174
.414
PA-31-350
MIN.
THICKNESS
.130
.127
.385
.225
.090
NOTE: Refer to Service
Manual for detailed service
instructions, and Parts Catalog
for specific part numbers.
Dimensions for new parts will
insure using the correct part
for the particular installation.
Reissued: 9/23/80
2G4
LANDING GEAR AND BRAKE SYSTEM