NOTE: This position is where the actuator stops after
____
it operates electrically.
(c)
Turn the torque wrench five turns in the CLOSE direction.
(d)
Turn the torque wrench five turns in the OPEN direction.
(e)
Make a note of the torque that is necessary to move the actuator.
(f)
Turn the torque wrench slowly in the OPEN direction.
(g)
Make sure you can turn the torque wrench from 2 to 4 turns before the actuator hits the internal stops.
NOTE: The actuator has hit the stops when the torque
____ increases 15 to 20 pound-inches during one-half turn of the wrench.
S 726-037
(6) Do a check of the internal stops on the hook actuator.
NOTE: The door is open for this check.
____
(a) Put the torque wrench in the manual drive socket of the actuator.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
52-32-00
ALL ú ú 03 Page 618 ú Jun 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
(b) Make a mark on the door to show the position of the torque wrench handle.
NOTE: This position is where the actuator stops after
____ it operates electrically.
(c)
Turn the torque wrench five turns in the CLOSE direction.
(d)
Turn the torque wrench five turns in the OPEN direction.
(e)
Make a note of the torque that is necessary to move the actuator.
(f)
Turn the torque wrench slowly in the OPEN direction.
(g)
Make sure you can turn the torque wrench from 2 to 4 turns before the actuator hits the internal stops.
NOTE: The actuator has hit the stops when the torque
____ increases 15 to 20 pound-inches during one-half turn of the wrench.
S 866-038
(7)
Close and lock the door.
S 726-039
(8)
See that the pressure relief doors move correctly when you lock the door.
TASK 52-32-00-206-041
5. Master Latch Lock System - Inspection/Check
___________________________________________
A. Procedure
S 216-042
(1)
Examine the latch lock sectors for damage (Fig. 602).
(2)
Replace the latch lock sectors that are damaged.
S 966-043
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
52-32-00
ALL ú ú 03 Page 619 ú Jun 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
(3) S 226-044AIRPLANES WITH ALUMINUM LATCH LOCK SECTORS; Examine the bottom of the latch lock sectors for damage.
NOTE:____ You must replace a latch lock sector with gouges more than 0.03-inch deep.
(4) S 216-045Examine the bearings and bearing housings along the length of the latch lock sector torque tube for damage.
(5) S 966-046Replace the bearings or bearing housings that are damaged.
(6) S 216-047Examine the door lower beam web at the cutouts for gouges and deformation.
NOTE:____ Refer to the Structural Repair Manual for the repair procedure.
(7) S 216-054Make sure that the latch pins are installed correctly (Figure 603).
(8) S 716-048Do these steps to make sure the master latch lock switch S1240 operates correctly: (a) Use the LATCHES CLOSED light to do a check as follows: 1) Open the master latch lock handle. 2) Make sure the green "LATCHES CLOSED" light comes on. 3) Close the master latch lock handle. 4) Make sure the green "LATCHES CLOSED" light goes off.
(9) S 716-049Do these steps to make sure the master latch lock mechanism operates correctly: (a) Push the release trigger of the master latch lock handle. (b) Make sure you observe these conditions: 1) The master latch lock handle is in the unlocked (open) position. 2) The two pressure relief doors are open. 3) The master latch lock sectors have turned outboard to clear the latch cams.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：747-400 AMM 飞机维护手册 舱门 DOORS 2(115)
