Visual Check of the Upper Deck 604
 Crew Service Door Carriage
 Mechanism

 Visual Inspection of the Upper 602
 Deck Crew Service Door
 Operating Mechanism (Lining
 Installed)

 Visual Inspection of the Upper 602
 Deck Crew Service Door
 Operating Mechanism (Lining
 Removed)

 CREW SERVICE DOOR - INTERNAL AND 52-13-03 EXTERNAL HANDLES Removal/Installation 401 [*] [*] FREIGHTERS ONLY
 DOOR - UPPER DECK CREW SERVICE 52-13-01 Removal/Installation 401 ALL Upper Deck Crew Service Door 411 Installation Upper Deck Crew Service Door 401 Removal
 EMERGENCY EXIT 52-20-00
______________ CREW COMPARTMENT OVERHEAD HATCH 52-21-00
 Description and Operation 1 ALL General 1 Mechanism - Latching 1 Operation 1
 Inspection/Check 601 ALL
 52-CONTENTS
 GUN Page 4 Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 747-400 MAINTENANCE MANUAL
 CHAPTER 52 - DOORS
 TABLE OF CONTENTS
_________________
 Chapter Section Subject_______ Subject ____ Effectivity
_______ Page ___________
 HATCH - CREW COMPARTMENT 52-21-01 OVERHEAD Removal/Installation 401 ALL
 CARGO DOORS 52-30-00
___________
 Description and Operation 1 ALL
 General 1
 Door - Bulk Cargo 1
 Door - Side Cargo 1
 Doors - Forward and Aft Cargo 1

 NOSE CARGO DOOR SYSTEM 52-31-00
 Description and Operation 1 ALL General 1 Actuator - Push-Pull Cam 9 Actuators - Latch 9 Actuators - Linear 8 Door - Nose Cargo 1 Indication - Door Position 10 Panel - Latch Actuator Test 10 Switch - Pressure Relay -10
 Isolation
 Unit - Drive 8
 Operation 10

 Component Location 101 ALL Component Index Component Location
 Maintenance Practices 201 ALL Adjustment/Test 501 ALL Inspection/Check 601 ALL ACTUATOR - LATCH 52-31-05
 Removal/Installation 401 ALL
 Adjustment/Test 501 ALL

 ACTUATOR - LINEAR 52-31-02 Removal/Installation 401 ALL Inspection/Check 601 ALL Approved Repairs 801 [*]
 [*] AIRPLANES WITH NOSE CARGO DOOR
 52-CONTENTS
 GUN Page 5 Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 747-400 MAINTENANCE MANUAL
 CHAPTER 52 - DOORS
 TABLE OF CONTENTS
_________________
 Chapter Section Subject_______ Subject ____ Effectivity
_______ Page ___________
 DOOR - HINGE ACCESS CLEARANCE 52-31-12 Removal/Installation 401 ALL
 DOOR - NOSE CARGO 52-31-01 Removal/Installation 401 ALL Inspection/Check 601 ALL
 FITTING - PORTAL LATCH 52-31-06 Removal/Installation 401 ALL Inspection/Check 601 ALL
 HINGE - ACCESS CLEARANCE DOOR 52-31-12 Inspection/Check 601 ALL MANUAL DRIVE - LIFT MECHANISM 52-31-02 Adjustment/Test 501 ALL MECHANISM - PUSH-PULL CAM 52-31-09 Removal/Installation 401 ALL Push-Pull Cam Mechanism 405 Installation Push-Pull Cam Mechanism 401 Removal Adjustment/Test 501 ALL Nose Cargo Door Push-Pull 501 Cam Mechanism Manual Drive
 -Functional Test Inspection/Check 601 ALL PANEL - PRESSURE SWITCH AND 52-31-21 ISOLATION RELAY Removal/Installation 401 ALL SEALS - NOSE CARGO DOOR 52-31-13 Removal/Installation 401 ALL SHAFT - FLEXIBLE DRIVE 52-31-04 Removal/Installation 401 ALL SWITCHES - CONTROL 52-31-17 Removal/Installation 401 ALL
 UNIT - DRIVE  52-31-03 Removal/Installation 401 ALL
 52-CONTENTS
 GUN Page 6 Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 747-400 MAINTENANCE MANUAL
 CHAPTER 52 - DOORS
 TABLE OF CONTENTS
_________________
 Chapter Section
 Subject_______  Subject ____ Effectivity_______ Page ___________
 SIDE CARGO DOOR  52-32-00
 Description and Operation 1 ALL General 1 Actuators - Rotary 10 Assembly - Gearbox and Brake 9 Door 1 Mechanism - Hook 8 Mechanism - Latch 8 Mechanism - Lift 9 Mechanism - Manual Drive 10 Mechanism - Master Latch Lock 4 Switches - Control and 10
 Sequence
 Operation 11

 Component Location 101 ALL Component Index Component Location
 Adjustment/Test 501 ALL Inspection/Check 601 ALL ACTUATOR - HOOK 52-32-11
 Removal/Installation 401 ALL ACTUATOR - LATCH 52-32-09 Removal/Installation 401 ALL ASSEMBLY - GEARBOX AND BRAKE 52-32-04 Removal/Installation 401 ALL DOOR - PRESSURE RELAY 52-32-07 Removal/Installation 401 ALL
 DOOR - SIDE CARGO 52-32-01 Removal/Installation 401 ALL Inspection/Check 601 ALL
 HANDLE - MASTER LATCH LOCK 52-32-06 Adjustment/Test 501 ALL Approved Repairs 801 ALL
　
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