747-400 AMM 飞机维护手册 舱门 DOORS 2(74)

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 4) Depress and hold door restraint manual release button.
 5) Rotate hook drive approximately 10 turns counterclockwise.
 6) Release door restraint manual release button and continue
 rotating hook drive until stop is contacted.
 NOTE: Door should have moved outward approximately 3
____ inches when hook open stops are contacted.
 Final manual rotation of hook actuator may be difficult. Final hook rotation may be assisted by using lift actuator manually or electrically.
 (d)  Unhook door (optional procedure).
 NOTE:____The door has two identical hook mechanisms. The following steps must be performed simultaneously on both mechanisms.
 1) Remove cover from hook actuator manual drive port.
 CAUTION: DO NOT USE POWER TOOLS TO OPERATE HOOK ACTUATOR.
_______ POWER TOOLS CAN CAUSE DAMAGE BY EXCEEDING TORQUE LIMITATIONS. MAXIMUM ALLOWABLE TORQUE IS 70 POUND-INCHES. WHEN MANUALLY OPERATING POWER UNIT, STOP CONTACT IS FELT BY A SUDDEN TORQUE RISE WHICH IS NOT TO EXCEED 70 POUND-INCHES.
 2) Insert 1/2-inch drive speed wrench in manual drive socket. 3) Depress door restraint manual release button and hold.
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747-400 MAINTENANCE MANUAL
 4)  Rotate manual drive counterclockwise approximately 90 turns until stop is contacted.
 NOTE: Door should have moved outward approximately
____ 3 inches when hook open stops are contacted.
 Final manual rotation of hook actuator may be difficult. Final hook rotation may be assisted by using lift actuator manually or electrically.
 5)  Release restraint manual release button.
 NOTE: Door restraint plunger may be released after
____ approximately 66 turns.
 WARNING: INSTALL SAFETY NET ACROSS DOOR OPENING IF DOOR IS TO BE
_______ LEFT OPEN LONG ENOUGH TO BECOME A SAFETY HAZARD TO PERSONNEL.
 MAKE SURE THAT PERSONS AND EQUIPMENT ARE AWAY FROM THE DOOR AND THE DOOR OPENING WHEN YOU OPERATE THE DOOR. FAILURE OF THE LIFT MECHANISM COULD CAUSE THE DOOR TO CLOSE QUICKLY WHICH COULD CAUSE INJURY OR DAMAGE.
 (e)  Open door.
 CAUTION:_______ DO NOT EXCEED 50 POUND-INCHES TORQUE.  EXCESSIVE
 TORQUE CAN CAUSE DAMAGE.
 1)  Insert a 1/2-inch drive speed wrench in manual drive
 socket and rotate in direction of arrow until up stops
 (on rotary actuator arms) are contacted.
 CAUTION:_______ POWER TOOLS USED TO OPERATE LIFT ACTUATOR MANUALLY MUST BE
 LIMITED TO 500 RPM MAXIMUM.
 DO NOT USE POWER TOOLS TO OPERATE HOOK OR LATCH ACTUATORS.

 (3)  Close door manually. WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE AWAY FROM THE
_______ DOOR AND THE DOOR OPENING WHEN YOU OPERATE THE DOOR. FAILURE OF THE LIFT MECHANISM COULD CAUSE THE DOOR TO CLOSE QUICKLY WHICH COULD CAUSE INJURY OR DAMAGE.
 (a)  Close door.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
 (b)
(c)
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747-400 MAINTENANCE MANUAL
 CAUTION:_______DO NOT EXCEED 50 POUND-INCHES TORQUE. EXCESSIVE TORQUE CAN CAUSE DAMAGE.
 1)  Insert a 1/2-inch drive speed wrench in lift power unit manual drive socket and rotate speed wrench in direction opposite to arrow until down stops (on rotary actuator arms) are contacted.
Close hooks.
 1)  Remove cover from hook actuator manual drive port and insert a 1/2-inch drive speed wrench in manual drive socket.
 CAUTION: DO NOT USE POWER TOOLS TO OPERATE HOOK ACTUATOR.
_______ POWER TOOLS CAN CAUSE DAMAGE BY EXCEEDING TORQUE LIMITATIONS. MAXIMUM ALLOWABLE TORQUE IS 70 POUND-INCHES. WHEN MANUALLY OPERATING POWER UNIT, ANY STOP CONTACT IS FELT BY A SUDDEN TORQUE RISE WHICH IS NOT TO EXCEED 70 POUND-INCHES.
 2)  Rotate manual drive clockwise until door is pulled into the fully closed position, fair with airplane skin.
 NOTE: Initial manual rotation of hook actuator may be
____ difficult. Initial hook rotation may be assisted by using lift actuator manually or electrically.
　
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