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12-15-03
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
F. Procedure
S 613-010
(1) Make sure that all antiskid and autobrake system equipment is serviceable.
NOTE: If there are problems with the antiskid or autobrake systems,
____ your average main landing gear tire pressures can be higher than normal; this could cause you to over-inflate a suspected low pressure tire.
S 613-023
CAUTION: MAKE SURE THE DIRECT READING GAGE IS CORRECTLY CALIBRATED AND
_______ HAS AN APPROVED DIAL. IF THE GAGE IS NOT ACCURATE, YOU CAN INFLATE THE TIRES TO AN INCORRECT PRESSURE. THIS CAN CAUSE DAMAGE TO THE TIRES.
(2) If all of the main landing gear tires can be assumed to be at approximately the same temperature, measure all of the main landing gear tire pressures and make a record of the values.
(a) Use the pressure gage to measure the main landing gear tire pressures.
S 613-011
(3) Use the tire pressure tables for the main landing gear (Fig. 301, Fig. 302).
NOTE: The inflation pressures that are shown are for cold, loaded
____ tires (for example, with the airplane resting on the tires). For unloaded tires, decrease the presure by 5 psig.
(a) For the applicable airplane maximum taxi weight and tire, find the minimum service pressure.
S 613-013
(4) Make sure that all of the main landing gear tire pressures are above the minimum "cold" specified pressures for the airplane's maximum taxi weight.
S 613-022
CAUTION: DO NOT DEFLATE A HOT TIRE TO LOWER THE PRESSURE TO THE AVERAGE
_______ PRESSURE VALUE. PRESSURE SHOULD NEVER BE BLED FROM A HOT TIRE TO ACHIEVE A SPECIFIED VALUE. DAMAGE TO EQUIPMENT CAN OCCUR.
(5) If the pressure of one tire is low, calculate the average of the other seven tires.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
12-15-03
ú ALL ú
ú ú ú 01.101 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. Page 310Sep 28/02
A
757
MAINTENANCE MANUAL
S 613-015
(6) If the pressure of the low tire is 5% - 10% less than the average
pressure of the other seven tires, do these steps:
WARNING: USE A REGULATED PRESSURE SOURCE TO SERVICE THE TIRES. AN_______
UNREGULATED PRESSURE SOURCE CAN CAUSE INJURIES TO PERSONS
AND DAMAGE TO EQUIPMENT.
(a) Connect the inflator, F70199-1 to the inflation valve and
inflate the tire with nitrogen, BB-N-411, Type I or
MIL-PRF-27401, Type I to the average value of the other seven
tires.
(b) Remove the inflator, F70199-1 from the inflation valve.
S 613-016
(7) If the pressure of one tire is more than 10% below the average
pressure of the other seven tires, do these steps:
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