B.
Access
(1)
Location Zone 117 Electrical and Electronics Compartment, LH 118 Electrical and Electronics Compartment, RH
(2)
Access Panel
117A Door - Electronics Compartment Access
C.
Procedure
S 014-002
(1)
Open the door.
(a)
Turn the internal or external operating handle to the OPEN position.
(b)
Move the door along the track until it is in the detent.
S 024-022
(2)
Remove the door.
(a)
Remove the sections of the tracks that are corners (Detail A).
(b)
Identify the sections of the track with tags.
(c)
Move the door in the direction of the opening until the rollers come off the track.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
52-48-03
ALL ú ú 01 Page 401 ú Feb 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
SEE A
TRACK SECTION
SEE B
INSIDE HANDLE
LATCH PIN (4 LOCATIONS)
SEE C
____NOTE: THE LEFT LATCH PIN
OPERATES THE DOOR
WARNING SWITCH.
SEE D
+0.04
0.09 INCH
-0.08
FITTING
PLATE WITH
SERRATIONS
747-400
MAINTENANCE MANUAL
0.03 INCH MAXIMUM FORWARD
CLEARANCE TRACKS
TRACK SECTION
TRACK SECTION
SCREW
TRACK SECTION SEE B TRACK SECTION
0.01 INCH MAXIMUM
B
AFT TRACKS (THE COMPLETE TRACKS ARE NOT SHOWN)
FWD INBD
A
LOCKNUT (2 LOCATIONS)
ACTUATOR
DOOR FRAME
LEFT LATCH PIN
LATCH PIN
SHIM
DOOR STOP
LATCH PIN - EXAMPLE DOOR WARNING SWITCH CD Main (Forward) Electronics Bay External Access Door Figure 401
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
52-48-03
ALL ú ú 01 Page 402 ú Feb 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
(d) Remove the door.
TASK 52-48-03-404-005
3. Main (Forward) Electronic Bay External Access Door Installation (Fig. 401)
_______________________________________________________________
A. Consumable Materials
(1)
C00523 Coating - Alodine, Clean, MIL-C-5541
(2)
BMS5-30 Adhesive (Type 48)
(3)
Solvent Series 88 (B01008)
B.
References
(1)
AMM 12-21-04/301, Doors
(2)
24-22-00/201, Manual Control
(3)
51-21-04/701, Alodized Surfaces
(4)
52-09-00/801, Door Seals
(5)
52-09-02/201, Flap-type Mechanical Seals
(6)
IPC 52-48-03 Fig. 1
(7)
SSM 52-71-01
(8)
WDM 52-71-14
C.
Access
(1)
Location Zone 117 Electrical and Electronics Compartment, LH 118 Electrical and Electronics Compartment, RH
(2)
Access Panel 117A Door - Electronics Compartment Access
D.
Procedure
S 214-017
(1)
Examine the door seal for damage.
S 394-023
(2)
Repair the seal if it is necessary (Ref 52-09-00/801).
S 424-007
(3)
Install the door.
(a)
Make sure the latch pins are retracted.
(b)
Put the door on the tracks.
(c)
Move the door up the tracks until it is in the detent.
(d)
Install the sections of the track that are corners.
NOTE: These sections have tags on them that identify
____ their correct location.
1) Attach the track to the structure with the screws.
2) See that one section of the track aligns with the other sections of the track. a) Make sure the track sections align in 0.01 inch or
less. b) Make sure the clearance between adjacent sections is
0.03 inch or less.
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