Subject Subject No. 
APU ACCESS DOOR ................................................................................................. 52-48-21 Description and Operation Latching Mechanism 
LOWER NOSE COMPARTMENT ACCESS DOOR................................................... 52-48-31 Description and Operation Latching Mechanism Removal/Installation 
ELECTRONIC EQUIPMENT COMPARTMENT EXTERNAL ACCESS DOOR ......... 52-48-41 Description and Operation 
Latching Mechanism 
Removal/Installation 
Adjustment/Test
MISCELLANEOUS EXTERIOR SERVICE DOORS................................................... 52-49-0 Description and Operation 
Section 48 Access and Blowout Door...................................................................... 52-49-11 Removal/Installation Adjustment/Test 
Pressure Fueling Station Access Door .................................................................... 52-49-21 Adjustment 
Tire Burst Protector Screen Doors........................................................................... *[5] 52-49-31 Maintenance Practices Removal/Installation 
FIXED INTERIOR 
CONTROL CABIN DOOR........................................................................................... 52-51-0 Description and Operation 
Control Cabin Door Lock Switch/Light ..................................................................... 52-51-12 Removal/Installation Adjustment/Test 
Control Cabin Door Lock.......................................................................................... 52-51-21 Removal/Installation 
Control Cabin Door Emergency Exit Panels............................................................ 52-51-31 Removal/Installation 
LAVATORY DOORS................................................................................................... 52-52-0 Description and Operation 
5C8 Jun 20/89 Contents 52 
Page 7 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Subject Subject No. 
ENTRANCE STAIRS 
FORWARD AIRSTAIR AND DOOR ........................................................................... *[4] 52-61-0 Description and Operation Trouble Shooting Adjustment/Test 
FORWARD AIRSTAIR ................................................................................................ *[4] 52-61-100
Description and Operation 
Actuation System 
Carriage 
Electrical System 
Handrails 
Handrail Extension 
Rail Assemblies 
Stair 
Manual Operation
Removal/Installation 
Forward Airstair Actuator ......................................................................................... *[4] 52-61-111 Removal/Installation 
Forward Airstair Ballscrew ....................................................................................... *[4] 52-61-116 Removal/Installation 
Forward Airstair Motor ............................................................................................. *[4] 52-61-121 Removal/Installation 
Forward Airstair Carriage Step Actuating Mechanism............................................. *[4] 52-61-131 Removal/Installation 
Forward Airstair Retract Limit Switches................................................................... *[4] 52-61-141 Removal/Installation Adjustment/Test 
Forward Airstair Extend Limit Switches ................................................................... *[4] 52-61-151 Removal/Installation Adjustment/Test 
Forward Airstair Lower Ladder Operating Switch.................................................... *[4] 52-61-161 Removal/Installation Adjustment/Test 
Forward Airstair Lower Ladder Closed Switch......................................................... *[4] 52-61-171 Removal/Installation Adjustment/Test Subject Subject No. 
5C8  
Contents 52 Page 8  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  Feb 20/84 
Forward Airstair Manual Handrail Stowed Switches................................................ *[4] 52-61-181 Removal/Installation Adjustment/Test 
Forward Airstair Lower Ladder Lock........................................................................ *[4] 52-61-191 Adjustment/Test 
Forward Airstair Door Slow-Down Operating Limit Switch ...................................... *[4] 52-61-201 Removal/Installation Adjustment/Test 
Forward Airstair Speed-Up Limit Switch .................................................................. *[4] 52-61-211 Removal/Installation Adjustment/Test 
Forward Airstair Angle Gearbox............................................................................... *[4] 52-61-221 Removal/Installation 
 
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