(1)On airplanes line numbers 163,166 thru 168,174,175,176,178 and on,
stainless steel bearings per PRR 53752 replaced the alloy steel bearings
in the torque tubes at the hinges. This change can be incorporated on
other airplanes by SB 52-0025.
(2)At line number 191, stainless steel bearings per PRR 53752-1 replaced
alloy steel bearings in the handle box assembly in the door handle mech-anism. Anew handle mounting hub assembly is also used. These changes can
be incorporated on other airplanes by SB 52-0027.
(3)At line number 455, a production change replaced alloy steel bearings
with stainless steel bearings in the emergency power assist system and
the support assembly. This change can be incorporated on other airplanes
by SB 52-0055.
Volume 2-757
52-10-01
Page 1 OCT 01/00
CORROSION PREVENTION MANUAL
MAIN ENTRY AND PASSENGER DOORS
(4)Airplanes line numbers 519,545 have BMS 3-29 corrosion preventive com-pound on the passenger doors per RR 92038-3.
(5)On airplanes line numbers 1 to 771; Operators have reported soaked insu-lation blankets and slide packs on the passenger doors. Humid air from
the cabin flows into the passenger door and condenses on the cold door
structure during flight. Since the insulation blankets are attached to
the door structure, condensation is absorbed by the insulation blankets.
Also, when the airplane is on ground and the door is open, rainwater can
go into the door from the door's top beam cutout. PRR 54530-166 will
correct this problem. Related Service Bulletin 757-52-0071 gives
instructions to remove the insulation blankets from the door structure,
decrease the amount of airflow and rainwater into the door and direct
the water drainage away from the insulation blankets. See related
757-SRP-52-0007 for further details.
Volume 2-757
52-10-01
Page 2
OCT 01/00
CORROSION PREVENTIONMANUAL
MAIN ENTRY AND PASSENGER DOORS
MAIN ENTRY DOOR
(EXAMPLE)
Main Entry and Passenger Doors
Figure 1 (Sheet 1)
Volume 2-757
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Page 3 OCT 01/00
CORROSION PREVENTION MANUAL
MAIN ENTRY AND PASSENGER DOORS
PASSENGER DOOR 1L SHOWN
OTHER PASSENGER DOORS SIMILAR
Main Entry and Passenger Doors
Figure 1 (Sheet 2
Volume 2-757
52-10-01
Page 4 OCT 01/00
CORROSION PREVENTION MANUAL
MAIN ENTRY AND PASSENGER DOORS
BODY TORQUE TUBE DETAIL I DOOR TORQUE TUBE DETAIL II
Main Entry and Passenger Doors
Figure 1 (Sheet 3)
Volume 2-757
52-10-01
Page 5 OCT 01/00
CORROSION PREVENTIONMANUAL
MAIN ENTRY AND PASSENGERDOORS
DETAIL III
Main Entry and Passenger Doors
Figure 1 (Sheet 4)
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