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32-31-00
ALL ú ú 01 Page 513 ú Oct 10/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 747-400 MAINTENANCE MANUAL
(n) (o) Make a mark on the masking tape at the lower edge of the straightedge to make a note of the OFF position.Make a second index mark on the masking tape at a point 0.5 inches below the OFF index mark.
NOTE:____ This will show the minimum lever movement necessary before the landing gear doors start to close.
(p) Move the control lever slowly to the DN position.
NOTE:____ Follow the movement of the top surface of the control lever while you hold the straightedge horizontally.
(q) Make sure the lower edge of the straightedge gets to the second index mark on the masking tape before the landing gear doors start to close.
NOTE:____ Put a person on the outer side of the airplane to tell when the doors start to close.
(r) (s) (t) (u) When the landing gear doors start to close, move the control lever to the DN position and into the detent. 1) Make sure that the landing gear doors close. 2) Make sure the door open indication goes out of view on the EICAS GEAR display.Remove the masking tape from the P2-3 panel.Pull the control lever, in a straight direction, out of the DN detent.Move the control lever from the DN position to the OFF position. 1) Measure the force necessary to move the lever.
NOTE:____ Apply the force at a right angle at the end of the lever.
2) Make sure that the force necessary is not more than 11 pounds.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
32-31-00
ALL ú ú 01 Page 514 ú Oct 10/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
3) Make sure that all persons are clear of the landing gear
doors.
(v) Move the control lever from the OFF position to the UP
position.
1) Measure the force necessary to move the lever.
NOTE: Apply the force at a right angle at the end of the____
lever.
2) Make sure the force necessary is not more than 11 pounds.
(w) Move the control lever from the UP position to the OFF
position.
1) Measure the force necessary to move the lever.
NOTE: Apply the force at a right angle at the end of the____
lever.
2) Make sure the force necessary is not more than 11 pounds.
3) Make sure that all persons are clear of the landing gear
doors.
(x) Move the control lever from the OFF position to the DN
position.
1) Measure the force necessary to move the lever.
NOTE: Apply the force at a right angle at the end of the____
lever.
2) Make sure the force necessary is not more than 11 pounds.
3) Make sure the landing gear doors close.
(y) Move the control lever to the OFF position.
S 865-023
WARNING: MAKE SURE YOU REMOVE PRESSURE FROM HYDRAULIC SYSTEMS NO. 1
_______ AND 4. FAST MOVEMENT OF THE DOORS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(2)
Remove pressure from hydraulic systems No. 1 and 4 (AMM 29-11-00/201).
S 725-025
(3)
Do a test of the control lever without hydraulic pressure:
(a)
Move the control lever from the OFF position to the UP position. 1) Measure the force necessary to move the lever.
NOTE: Apply the force at a right angle at the end of the
____ lever.
2) Make sure the force necessary is not more than 7 pounds.
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