32-21-02
ALL ú ú 01 Page 204 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
CAUTION: A DEFLATED OR FLAT SHOCK STRUT CAN CAUSE DAMAGE DURING
_______ LANDING. IF THE AIRPLANE LANDED WITH A DEFLATED OR FLAT SHOCK STRUT, DO A HARD LANDING INSPECTION PER AMM 05-51-41/201 TO MAKE SURE THERE IS NO DAMAGE.
(a)
Continue to monitor the shock strut for leakage on subsequent landings. After 10 days service the shock strut with nitrogen and make sure the "X" dimension in the servicing chart is correct (AMM 12-15-05/301).
(b)
After 20 days deflate the shock strut and add oil until it is completely full. Then service the shock strut with nitrogen (AMM 12-15-05/301).
(c)
Do the 10 and 20 day servicing steps again until you change the seals.
S 612-056
(6) If there was leakage between 16 and 30 drops during the 15 minute period, do the steps that follow:
NOTE: 20 drops is equal to 1.0cc.
____
CAUTION: A DEFLATED OR FLAT SHOCK STRUT CAN CAUSE DAMAGE DURING
_______ LANDING. IF THE AIRPLANE LANDED WITH A DEFLATED OR FLAT SHOCK STRUT, DO A HARD LANDING INSPECTION PER AMM 05-51-41/201 TO MAKE SURE THERE IS NO DAMAGE.
(a)
Continue to monitor the shock strut for leakage on subsequent landings. After 5 days service the shock strut with nitrogen and make sure the "X" dimension in the servicing chart is correct (AMM 12-15-05/301).
(b)
After 10 days deflate the shock strut and add oil until it is completely full. Then service the shock strut with nitrogen (AMM 12-15-05/301).
(c)
Do the 5 and 10 day servicing steps again until you change the seals.
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32-21-02
ALL ú ú 01 Page 205 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 982-057
(7)
If the Leakage was more than 30 drops during the 15 minute period, the shock strut is not serviceable. You must replace the seals.
E.
Put the Airplane back to its Usual Condition.
S 092-026
WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO REMOVE THE
_______ DOOR LOCKS FROM THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT REMOVE THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(1)
Do this task: "Removal of the Door Locks from the Wing Landing Gear" (AMM 32-00-30/201).
S 092-027
(2)
Do this task: "Removal of the Door Locks from the Body Landing Gear" (AMM 32-00-30/201).
S 092-040
(3)
Do this task: "Removal of the Door Locks from the Nose Landing Gear" (AMM 32-00-30/201).
TASK 32-21-02-202-029
3. Scraper Ring Inspection And Optional Split Scraper Ring Installation for Nose_____________________________________________________________________________ Landing Gear (Fig. 201)____________
A. General
(1)
In several instances, scraper ring damage was found during servicing to install the spare seals. In some instances, a portion of the scraper ring was found protruding through the gland nut. In correcting these problems, some operators removed the landing gear from the airplane and disassembled the gear to install new seals and a new scraper ring. This procedure introduces an optional split scraper ring which can be installed to the landing gear without the removal of the gear or disassembly of the gear. Also, this procedure has two quick checks to examine the scraper ring while the landing gear is on the airplane.
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