Volume 2-757
52-10-01
Page 6 OCT 01/00
CORROSION PREVENTION MANUAL
MAIN ENTRY AND PASSENGER DOORS
DETAIL IV
Main Entry and Passenger Doors
Figure 1 (Sheet 5)
Volume 2-757
52-10-01
Page 7 OCT 01/00
CORROSION PREVENTIONMANUAL
MAIN ENTRY AND PASSENGER DOORS
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Volume 2-757
52-10-01
Page 8 OCT 01/00
CORROSION PREVENTION MANUAL
NO. 3 EMERGENCY EXIT DOOR
1. General
A. Corrosion can occur on the door internal structure, lower corners and con-nection points and mechanisms.
B. Corrosion can occur on alloy steel bearings in the door mechanism.
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.
B. Prevention Treatment
(1)Treat the door at the same time as the door opening.
(2)Remove liner and gain access to the interior of the door.
(3)Clean out drains and drain paths.
(4)Apply corrosion inhibiting compound to the interior of the door. Be sure
you include the lower corners. Refer to Volume 1, 20-60-00 for details
on the application of corrosion inhibiting compound.
(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 liners. The compounds change the flammable quality of these materi-als.
(7)Lubricate interior door fittings as necessary per the maintenance man-ual.
(8)
Reinstall liner and restore door to normal.
C.
Frequency of Application. Periodically inspect the structure and condition
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.
D.
Improved Corrosion Protection
(1)At line number 534, PRR 54207 and 54460 replaced the alloy steel bear-ings with corrosion resistant steel bearings in the mechanism and link-ages. Also, the bearing housings are filled with BMS 3-24 grease. These
changes can be made on other airplanes with SB 52-0056.
Volume 2-757
52-20-01
Page 1 OCT 01/00
CORROSION PREVENTIONMANUAL
NO. 3 EMERGENCY EXIT DOOR
NO. 3 EMERGENCYEXIT DOOR
DETAIL I
Emergency Exit Door
Figure 1 (Sheet 1)
Volume 2-757
52-20-01
Page 2
OCT 01/00
CORROSION PREVENTIONMANUAL
NO. 3 EMERGENCY EXIT DOOR
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