1) Make sure the maximum stow time of the thrust reverser is not more than 5.0 seconds. a) Make sure the green REV indication goes off and the
amber REV indication comes on while the thrust reverser moves. b) Make sure the amber REV indication goes off when the thrust reverser is in the stowed position.
(b) Look at the EPCS Maintenance Page on the EICAS (use the steps above) to make sure the RP shows between -4 and 4 percent.
S 865-028-N00
(8) Use the Power Plant Operation (Normal) procedure to do the engine shutdown (AMM 71-00-00/201).
TASK 78-31-00-715-029-N00
4. Locking Hydraulic Actuator Check
________________________________
A. References
(1)
AMM 27-62-00/201, Speed Brake Control System
B.
Access
(1)
Location Zones 415 and 416 Engine 1 - Thrust Reverser Halves 425 and 426 Engine 2 - Thrust Reverser Halves 435 and 436 Engine 3 - Thrust Reverser Halves 445 and 446 Engine 4 - Thrust Reverser Halves
(2)
Access Panels
413 and 414 Fan Cowl Panels - Engine 1
417 and 418 Core Cowl Panels - Engine 1
423 and 424 Fan Cowl Panels - Engine 2
427 and 428 Core Cowl Panels - Engine 2
433 and 434 Fan Cowl Panels - Engine 3
437 and 438 Core Cowl Panels - Engine 3
443 and 444 Fan Cowl Panels - Engine 4
447 and 448 Core Cowl Panels - Engine 4
C.
Do a Check of the Locking Hydraulic Actuator (Fig. 501).
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78-31-00
ALL ú ú N01 Page 511 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
CENTER LOCKING HYDRAULIC ACTUATOR
(STOW POSITION)
Center Locking Hydraulic Actuator Check
Figure 501
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78-31-00
ALL ú ú N01 Page 512 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
M49514
S 865-030-N00
WARNING:_______ DO THE DEACTIVATION PROCEDURE FOR THE SPEED BRAKE CONTROL
SYSTEM. IF YOU DO NOT DO THIS, THE SPOILERS CAN MOVE QUICKLY
WHEN YOU MOVE THE THRUST LEVERS. THIS CAN CAUSE INJURY TO
PERSONS AND DAMAGE TO EQUIPMENT.
(1)
Do the deactivation procedure for the applicable Speed Brake Control System (AMM 27-62-00/201).
S 015-031-N00
(2)
Open the fan cowl panels (AMM 71-11-04/201).
S 225-032-N00
(3)
Make sure the clearance between the face of the actuator lock proximity sensor and the lock lever target on the center locking hydraulic actuator is 0.010 to 0.040 inch (0.254 - 1.016 mm).
(a)
If the clearance is not correct, extend and retract the thrust reverser with hydraulic power to fully retract each sleeve (AMM 78-31-00/201).
(b)
Do a check of the clearance between the actuator lock proximity sensor and the lock lever target again.
(c)
If the clearance is not correct, do the adjustment procedure for the actuator lock proximity sensor (AMM 78-36-00/501).
(d)
Use hydraulic power to extend and retract the thrust reverser again (AMM 78-31-00/201).
(e)
Do a check of the clearance between the actuator lock proximity sensor and the lock lever target again.
(f)
If the clearance is not correct, replace the locking hydraulic actuator (AMM 78-31-17/401).
S 865-033-N00
(4) Make sure the reverse thrust lever is in the stow position and attach a DO-NOT-OPERATE tag.
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