Brake Lining Conditioning Procedures; Thrush Metallic Linings - Thrush Aircraft S2RHG-T65 TURBO THRUSH Maintenance Manual

THRUSH AIRCRAFT, INC – MODEL S2RHG-T65 TURBO THRUSH
D. Install insulator shims (typically used with metallic lining) and spacers as
applicable.
E. Slide back plates between brake disc and wheel/tire and install back plate
attachment bolts and washers into back plates.
F. Torque brake assembly back plate tie bolts to 60 inch-pounds. Two different
types of back plate tie bolts are used. The patch lock bolt (nylon material
embedded in threaded end) will required replacement 6 to 8 installations or
whenever the bolts can be run in past the locking feature by use of fingers only.
Bolts with drilled heads require safety wire after torquing.

BRAKE LINING CONDITIONING PROCEDURES

When new linings have been installed, it is important to condition them properly to
obtain the service life designed into them.
A. Perform two (2) consecutive full stop braking applications from 35 to 40 mph (30
to 35 knots). Do not allow the brake discs to cool substantially between the stops.
B. Allow the brakes to cool for 10 – 15 minutes.
C. Apply brakes and check for restraint at high static throttle. If brakes hold,
conditioning is complete.
D. If brakes cannot hold aircraft during static run-up, allow brakes to completely
cool, and repeat steps 1 through 3.
Due to the efficiency of these brakes, extremely hard braking
on aircraft with tail wheels could result in lifting the tail from
the ground, creating a nose over condition.
Use extreme caution to prevent aircraft from nosing over
when running engine at high static throttle (power lever)
settings, hopper and fuel system should be full to help keep
aircraft from nosing over.
This conditioning procedure will wear off high spots and generate sufficient heat to
create a thin layer of glazed material at the lining friction surface. Normal brake usage
should generate enough heat to maintain the glaze throughout the life of the lining.
Effective: 5/25/05
AIRCRAFT MAINTENANCE MANUAL

THRUSH METALLIC LININGS

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