(4)No. 1  Passenger Door Opening:

(a)
Treatment  of the door at the same time as the door opening is recom-mended.

(b)
Remove  traffic debris and generally clean the entire door opening
area. Remove reveal and scuff plate where applicable.

(c)  
Relubricate all tube points per standard servicing procedures.

(d)
Where  accessible, apply corrosion inhibitor to the internal lower
sill area.

(e)
Special effort should be made to apply the corrosion inhibitor along
doubter edges, along faying surfaces and on fastener heads. Spray
all door and fuselage fittings at the faying surfaces. The use of
spray equipment with nozzle directed into faying surface is recom-mended.

(f)
Apply BMS 3-23 corrosion inhibiting compound to nose gear door oper-ator support fitting and miscellaneous other fittings. Ensure that
all lugs and lug faces are treated.

Volume 2-757

53-10-01
Page 3 OCT 01/00
CORROSION PREVENTION MANUAL
FUSELAGE -SECTION 41

(5)If you clean an area with steam or high pressure water and detergent,
apply the corrosion inhibitor again.

(6)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.

(7)
Do not apply corrosion inhibiting compounds on insulation blankets. The
compounds reduce the water-repellent quality of the blankets.

E.  
Frequency of Application

(1)Periodic  inspection is required in areas identified as susceptible to
corrosion and should be consistent to the schedules specified in the
Maintenance Planning Document. Operators must be aware of reported prob-lems and areas of occurrences.

(2)
Periodic application of BMS 3-23 compound is necessary to areas identi-fied and should be consistent to the schedule specified in the Mainte-nance Planning Document.

F.  
Improved Corrosion Protection:

(1)On airplanes line number 55 and on, PRR N53010 added more drains in the
frame structure in the nose wheel well area, and two drain valves adja-cent to the nose wheel well. These changes can be incorporated on other
airplanes per SB 53-0008.

(2)On airplane line number 140 and on, per PRR 53423, one more coat of yel-low primer BMS 10-11, type 1 is applied to structure that touches pillow
blanket insulation.

(3)Between  airplane numbers 241 and 268, BMS 5-95 sealant was added per PRR
54124 to all permanently-fastened parts not already sealed in the wheel
　
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