PERCENT.
 (4)  
Apply enamel or lacquer with spray equipment. Make sure there is a sufficiently wet layer to give uniform flowout but not to cause runs and sags.

 S 117-009

 (5)  
Remove rough edges from the markings with BMS 3-2 solvent or burnishing tool after the marking cures.

 NOTE: An alternative procedure to remove rough edges is to remove
____ masking tape while paint film is still wet. This permits paint to flow out.
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 ALL  ú ú 01 Page 705 ú Oct 10/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 HARTWELL TYPE LATCHES - ADJUSTMENT/TEST
_______________________________________
 1.  General
_______
 A.  This procedure contains two tasks. The first is testing Hartwell latches. The second is adjusting Hartwell latches.
 B.  Hartwell type latches are used on small flush-fitting service access doors such as those for the potable water and lavatory service panels and the forward and mid drain mast access doors.
 TASK 20-11-11-705-001
 2.  Test Hartwell Latches, Series 5100
__________________________________
 A.  Procedure
 S 725-002
 (1)  Test Hartwell series 5100 latches.
 (a)  
Check that door turns freely to within +0.100 or -0.030 inch of contour at latch position.

 (b)  
The latch you want to check, press door to fit and come in line at door edge as shown in Fig. 501. Lock latch and check that preload is there by pushing latch bolt at location mentioned in Fig. 501. There must be 0.010 to 0.030 inch depression free play at this point. Adjust per par. 3 if you do not get free play.

 (c)  
Check that door latch bolt overlap on structure to be 0.25 inch as shown in Fig. 501.

 TASK 20-11-11-825-003
 3.  Adjust Latches______________(Fig. 501.)
 A.  Procedure
 S 825-004
 (1)  If you cannot get 0.010 to 0.030 inch depression free play, add or subtract phenolic shims.
 NOTE: Nominal 0.030 and 0.040 inch shims are installed to get
____ dimensional condition shown in Fig. 501. Shim thickness may be different.
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 ALL  ú ú 01 Page 501 ú Feb 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

PRESS TO  PRESS DOOR
CHECK FREE  (RIVETED)
OPEN  AT EDGE FOR
PLAY FOR LATCH
FREE PLAY
0.01 TO 0.03 INCH
CHECK
Hartwell Latches, Series 5100, Adjustment
Figure 501

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 ALL  ú ú 01 Page 502 ú Jun 10/88
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 METAL SURFACES - CLEANING/PAINTING
__________________________________
 1.  General
_______
 A.  This procedure contains five tasks. The first task is to hand clean metal surfaces with abrasives. The second task is to clean metal surfaces with a rotary banding brush. The third task is to clean metal surfaces with a rotary abrasive disk. The fourth task is to remove paint from metal surfaces. The fifth task is to clean bare, clad, or plated metal with solvent.
 B.  Use this procedure for faying surface bonds and bonding jumper installation. Do not use abrasives or wire brushes on CRES, plated surfaces, or alclad aluminum that is not painted.
 TASK 20-11-14-147-009
 2.  Hand Clean Metal Surfaces with Abrasives
________________________________________
 A.  General
 (1)  
Do not use abrasives on plated surfaces, alclad aluminum, or CRES.

 (2)  
This is the only procedure you can use to clean titanium.
　
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