(5)Refer to Volume 1, 20-60-00 for details on the application of corrosion
inhibiting compound.
(6)Apply BMS 3-23 to the interior of the door, giving special attention to
structural seams. Do not apply to drain valve or other operational mech-anism.
(7)
Restore door to normal.
B.
Frequency of Application. Periodically inspect the door structure and con-dition of the corrosion inhibitor and leveling compound. 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
52-40-02
Page 1
OCT 01/00
CORROSION PREVENTIONMANUAL
FORWARD ACCESS DOOR
LEAF SPRING TYPE DRAIN VALVE
PLUNGER TYPE DRAIN VALVE
DETAIL I
Forward Access Door
Figure 1
Volume 2-757
52-40-02
Page 2 OCT 01/00
CORROSION PREVENTIONMANUAL
ELECTRICAL/ELECTRONICS ACCESS DOOR
1. General
A. The electrical/electronics access door has a corrosion protective finish
that consists of chemical finish (Alodine) on clad aluminum parts, anodize
surface treatment on non-clad aluminum parts, a coat of BMS 10-11, type I,
primer and a coat of BMS 10-11, type II, enamel. Faying surfaces of dissim-ilar metals and parts attached to the door skin are fay sealed with BMS 5-95
sealant. All areas of possible moisture accumulation are drained or filled
with BMS 5-125 leveling compound. The exterior of the door is unfinished
during production unless otherwise requested by the operator.
B. Areas of possible corrosion are the internal structure of the door, connec-tion points and mechanisms.
C. Corrosion can also occur on the frame structure under the latch fitting,
which mates with the latch pin on the door. Refer to 53-30-01 for further
information.
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) Gain access to interior structure of the door.
(2)Clean out drains and drain paths. Check condition of leveling compound
(Ref Component Maintenance Manual, 52-48-15).
(3)Check that drain valve is free to open and close.
CAUTION: EXCESSIVE TIGHTENING OF PLUNGER TYPE DRAIN VALVE WILL CAUSE VALVE
FLANGE TO CRACK OR BREAK.
(4) If required, remove plunger type drain valve from outside of door, clean
out obstructions and reinstall valve until flange contacts skin. Tighten
to 15 lb-in. maximum.
(5)Refer to Volume 1, 20-60-00 for details on the application of corrosion
inhibiting compound.
(6)Apply corrosion inhibiting compound to the interior of the door, giving 中國(guó)航空網(wǎng) www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：757 防腐手冊(cè) CORROSION PREVENTION MANUAL(19)
