CAUTION:_______ DO NOT APPLY TOO MUCH ADHESIVE ON THE FITTING AND THE PART IT
CONNECTS TO. TOO MUCH ADHESIVE ON THE FITTING WILL CAUSE A
BLOCKAGE TO THE LUBRICATION PASSAGES AND CAUSE DAMAGE TO
EQUIPMENT.
(4) Do these steps to install the lubrication fitting:
(a) Use a cotton swab to apply a thin layer of adhesive to the inner diameter of the hole (between 0.25 and 0.40 inch in depth).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
20-11-27
ALL ú ú 02 Page 403 ú Oct 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
(b) Put the lubrication fitting into liquid nitrogen for at least one minute to make sure the fitting is fully cool.
CAUTION: MAKE SURE YOU USE THE CORRECT TOOL TO INSTALL THE
_______ LUBRICATION FITTING. MOVE THE FITTING IN A STRAIGHT LINE TO PREVENT DAMAGE TO THE MATING PART.
(c) Use the correct drive tool to install the lubrication fitting into the hole in the part the fitting connects to.
NOTE: Install the lubrication fitting into the hole in the
____ mating part immediately . If you do not install the fitting immediately it will become too warm.
(d) Let the lubrication fitting cure for 12 hours at approximately 68°F before you use it.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
20-11-27
ALL ú ú 01 Page 404 ú Feb 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
LOCKWIRE - REMOVAL/INSTALLATION
_______________________________
1. General
_______
A. This procedure contains one task. The task is the replacement of lockwires.
B. If this procedure does not agree with specified maintenance procedures, use the specified maintenance procedure.
C. Do not use lockwire more than once.
D. Install the lockwire to put tension on the wire when the parts become loose.
E. Make three to six twists at the end of the wire. Bend the twists back or under to give the wire ends protection so they will not catch something.
F. Use the double twist procedure for all lockwire unless a single wire procedure is specified.
G. Install and twist the safety wire so the loop around the head stays down. (If the loop tended to come up over the bolt head there would be a slack loop.)
H. For multiple fasteners spaced less than four inches apart, the maximum number which can be safety wired together shall be the number than can be wired with a 24-inch length of wire.
I. For fasteners four to six inches apart, wire together in series no more than three fasteners.
J. Where fasteners are more than six inches apart, do not tie them in series unless tie points are provided on adjacent parts to shorten the wire span to less than six inches.
K. Use a right-handed twist for all double twist installations.
L. Safety-wire diameter shall be between 1/3 and 3/4 of the hole diameter, 0.032-inch diameter minimum.
M. Safety-wire 0.020 inch in diameter may be used if:
(1)
The safety-wire hole is 0.045 inch diameter or smaller, or
(2)
The spacing between parts is less than two inches and the safety
wire hole diameter is between 0.045 and 0.062 inch diameter. ~.............................................................................. | TWIST PER INCH | ................................................................................ | | | 0.019 | 0.023 | 0.043 | | |Safety Wire| Less Than | to | to | to | More Than | | Dia. Inch | 0.019 | 0.026 | 0.042 | 0.065 | 0.065 | ................................................................................ |Twists/Inch| 11 to 14 | 9 to 12 | 7 to 10 | 5 to 8 | 4 to 7 | 2...........…...........…............….............….............….............1
TASK 20-11-28-964-010
2. Lockwire - Replacement (Fig. 401)
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：747-400 AMM 飛機維護手冊 STANDARD PRACTICES - AIRFRAME(80)
