HINGE ASSEMBLY
DETAIL II
Emergency Exit Door 
Figure 1 (Sheet 2)
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CORROSION PREVENTIONMANUAL 
NO. 3 EMERGENCY EXIT DOOR
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CORROSION PREVENTION MANUAL 
CARGO DOORS
1. General
A. Areas of possible corrosion are the internal structure of the door, connec-tion points and mechanisms. The cargo door should be treated at the same 
time as the cargo door opening.
B. On airplanes line number 74 and on, BMS 3-23 corrosion inhibiting compound 
was applied to the interior of all cargo doors.
2. Corrosion Prevention
A. Make periodic inspections as described in Volume 1, 20-20-00 to ensure that 
the protective finishes provided during manufacture remain intact.
(1)Remove liner and gain access to interior structure of the door.
(2)Clean out drains and drain paths.
(3)Refer  to Volume 1, 20-60-00 for details on the application of corrosion 
inhibiting compound.
(4)Apply  corrosion inhibiting compound to the interior of the door, giving 
special attention to the lower corners.
(5)Do not apply corrosion inhibiting compounds on grease joints or sealed 
bearings. These compounds dissolve grease and other lubricants. They are 
penetrating compounds and can get around the seals and into the bear-ings.
(6)Do not apply corrosion inhibiting compounds on interior materials such 
as cargo liners. The compounds change the flammable quality of these 
materials.
(7)Relubricate interior door fittings as necessary per the maintenance man-ual.
(8)
Reinstall liner and restore door to normal.
B. 
Frequency  of Application. Periodically inspect the door structure and con-dition of the corrosion inhibitor. Reapply corrosion inhibiting compound as 
required. Local areas where gouges and scratches have occurred should be 
treated at the first opportunity consistent with the maintenance schedule.
Volume 2-757
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CORROSION PREVENTIONMANUAL
CARGO DOORS
NO. 1 AND 2 CARGO DOOR 
DETAIL I
Cargo Doors 
Figure 1 (Sheet 1)
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CORROSION PREVENTIONMANUAL
CARGO DOORS
NO. 3 CARGO DOOR 
DETAILII
Cargo Doors 
Figure 1 (Sheet 2)
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CORROSION PREVENTION MANUAL 
CARGO DOORS
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CORROSION PREVENTION MANUAL 
LAVATORY SERVICE PANELS