757 防腐手册 CORROSION PREVENTION MANUAL(34)

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

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

(5)Do not apply corrosion inhibiting compounds on interior materials such
as cargo liners. The compounds change the flammable quality of these
materials.

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

(7)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.

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 140 and on, PRR 53423 applies one more coat of
yellow primer BMS 10-11, type 1 to the structure that touches pillow
blanket insulation.

(2)On airplanes line number 137 and on, PRR 53685 replaces the original
Corogard finish by BMS 10-100 (Aeroflex) on the upper and lower surfaces
of the wing box, on the upper surface of the pressure deck, and in the
area of the pressure-resistant beam.

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

(4)On airplanes  line number 355 and on, PRR 54287 added a nylon filler
between the level plate and the horizontal keel beam near station 1150.
This change can be incorporated on earlier airplanes with SB 53-0054.

Volume 2-757

53-40-01

Page 4
OCT 01/00

CORROSION PREVENTION MANUAL
FUSELAGE -SECTION 44

(5)On airplanes line number 328 and on, PRR 54313 added BMS 3-26 corrosion
preventive compound on top of the BMS 3-23 compound on these areas:

(a)
The internal and external surfaces of the keel beam box.

(b)
The top surface of the wing center section, between the front spar
and the wheel well bulkhead.

(c)
The top surface of the pressure deck, 20 inches forward and aft of
the rear spar.

(d)
The bilge area aft of the main gear wheel wells.