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(b)
(c)
(d)
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747-400 MAINTENANCE MANUAL
3) While the control lever is in the UP position, pull the
control lever out. 4) Release the lever. 5) Make sure the lever moves suddenly into the UP slot.
a) Make sure the control lever moves freely against the slot in the panel. b) Make sure the control lever does not rub against the
slot in the control panel.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 7 pounds.
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 7 pounds.
3) While in the DN position, pull the control lever out.
4) Release the handle.
5) Make sure the lever moves suddenly into the DN slot.
a) Make sure the control lever moves freely against the slot in the panel. b) Make sure the control lever does not rub against the
slot in the panel.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 the force necessary is not more than 7 pounds. 3) While in the OFF position, pull the control lever out. 4) Release the handle.
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A 747-400 MAINTENANCE MANUAL
(e) 5) Make sure the lever moves suddenly into the OFF slot. a) Make sure the control lever moves freely against the slot in the panel. b) Make sure the control lever does not rub against the slot in the panel.Pull the control lever, in a straight direction, out of the OFF detent until you can move it to the UP or DN position.
NOTE:____ Do not pull the lever fully out of the detent.
(f) 1) Make sure the force necessary is not more than 12 pounds.Put the control lever in the OFF detent.
S 865-026
(4) Pressurize hydraulic systems No. 1 and 4 (AMM 29-11-00/201).
S 865-027
(5) Open the 7F24 LANDING GEAR LEVER LOCK circuit breaker on the P7 Overhead Circuit Breaker Panel.
S 715-037
(6) Do a test of the override mechanism for the control lever. (a) Make sure that all persons are clear of the landing gear doors. (b) Move the control lever to the UP position. 1) Make sure the lock override mechanism does not permit you to move the control lever to the UP position. (c) Push the LOCK OVERRIDE button. (d) Move the control lever fully to the UP position. 1) Make sure the control lever moves freely when you move it to the UP position. (e) Move the control lever to the DN position. 1) Make sure the landing gear doors close.
S 865-028
(7) Move the control lever to the OFF position.
S 215-018
(8) If the movement for the control lever is not in the specified limits, do these steps: (a) Make sure that you adjusted the control system for the landing gear correctly.
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747-400
MAINTENANCE MANUAL
(b) If the control system is adjusted correctly, do a check of the selector valve for the wing gear and the control handle movement. 1) Find if the selector valve crank stops before the control
handle goes into the DN detent. 2) If it does, replace the selector valve crank.
S 435-019
(9)
If the condition continues, replace the selector valve for the wing gear (AMM 32-31-03/401).
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本文链接地址：747-400 AMM 飞机维护手册 起落架 LANDING GEAR 4(24)
