20-CONTENTS
GUN Page 5 Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
FLOOR PANEL PROTECTION - MAINTENANCE PRACTICES
______________________________________________
1. General_______
A. This procedure has this task:
(1) Floor panel damage prevention during maintenance.
TASK 20-09-01-612-001
2. Floor Panel Damage Prevention During Maintenance________________________________________________
A. To prevent possible damage to floor panels during maintenance, do these steps:
S 982-002
(1)
Let only one person at a time use the ladder, stand, or scaffolding.
S 822-003
(2)
Use plywood bearing pads that are a minimum of 1/2 inch thick and 1 foot square under each leg, if you have these conditions:
(a)
You use ladders, stands, or scaffolding with leg-bearing surfaces. Leg-bearing surfaces include rollers, screws, and sharp edges.
(b)
You have a leg-bearing surface of less than 8 square inches for each leg.
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20-09-01
ALL ú ú 01 Page 201 ú Oct 10/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
BEARINGS AND BUSHINGS - REMOVAL/INSTALLATION
____________________________________________
TASK 20-11-01-914-001
1. Bearings and Bushings - Removal/Installation____________________________________________
A. Procedure
S 914-002
(1) Use the instructions in SOPM 20-50-03, Standard Overhaul Practices Manual, to remove and install the bearings and bushings.
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20-11-01
ALL ú ú 01 Page 401 ú Feb 10/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
CABLE TURNBUCKLE LOCKING CLIPS - REMOVAL/INSTALLATION
_____________________________________________________
1. General_______
A. This procedure contains two tasks. The first task is the replacement of the turnbuckle locking clips. The second task is an alternative installation procedure for the turnbuckle assembly.
TASK 20-11-02-024-008
2. Replacement of Turnbuckle Locking Clips_______________________________________
A. Remove the Turnbuckle Locking Clips (Fig. 401)
S 034-002
(1)
Twist the turnbuckle locking clip and push the locking hook out of the hole in the center of the turnbuckle barrel.
S 024-003
(2)
Move the turnbuckle locking clip out from the turnbuckle slot.
B. Install the Turnbuckle Locking Clips (Fig. 401)
S 434-004
CAUTION:_______DO NOT USE THE TURNBUCKLE LOCKING CLIPS AGAIN. THEY CAN BE DEFECTIVE IF USED AGAIN.
(1)
Tighten the turnbuckle until not more than three threads are out of the barrel and until you have correct cable tension.
(2)
Align the slot in the barrel and the cable terminal.
(3)
Put the straight end of the locking clip into the aligned slot.
S 424-007
(4)
Put the locking clip hook over the hole in the center of the turnbuckle. Engage the hook into the hole.
S 824-005
S 434-006
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
20-11-02
ALL ú ú 01 Page 401 ú Oct 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
INSERT CLIP IN SLOT
LOCKING CLIPS
LOCKING CLIP INSERTED IN SAME TURNBUCKLE BARREL HOLE
LOCKING CLIP INSERTED IN OPPOSITE TURNBUCKLE BARREL HOLE
ENDS OF HOOK LIPS MUST
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