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 ú  to cool down before the airplane is dispatched, you can use this
 ú  procedure as an alternative inspection just prior to dispatch.
 ú
 ú  S 843-049
 ú 
        ú
 CAUTION:_______ IF YOU USE A DIRECT READING GAGE TO MEASURE THE TIRE PRESSURES,
 ú  MAKE SURE IT IS CORRECTLY CALIBRATED AND HAS AN APPROVED DIAL.
 ú  IF THE GAGE IS NOT ACCURATE, YOU CAN INFLATE THE TIRES TO AN
 ú  INCORRECT PRESSURE.  THIS CAN CAUSE DAMAGE TO THE TIRES.
 ú
 ú  (5)  Use a gage to measure the tire pressures.
 S 423-024
 WARNING:_______ MAKE SURE THE DOWNLOCK PINS ARE INSTALLED ON ALL THE LANDING
 GEAR.  WITHOUT THE DOWNLOCK PINS, THE LANDING GEAR COULD
 RETRACT AND CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
 (6)  If the downlock pins are not installed in the nose and main landing
 gear, install the landing gear downlock pins (AMM 32-00-15/201).

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 12-15-03
 ALL  ú ú 01.1 Page 309 ú Sep 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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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