LAMINATED SCREW SHIMS ADJUSTABLE FWD FAIRING
ADJUSTABLE FAIRING AND SEALS
Nose Cargo Door - Component Location Figure 102 (Sheet 3)
BODY SKIN
ADJUSTABLE ROD DOOR STOP
FWD
SEAL DEPRESSOR
PRESSURE SEAL
AERODYNAMIC SEAL
PORTAL STRUCTURE
C64323
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ACTUATOR SWITCH A 747-400 FAULT ISOLATION/MAINT MANUAL SWITCH DOOR CLOSED LATCH ACTUATOR DRIVE INPUT MANUAL SWITCH BRACKET
DOOR NOSE CARGO FWD STRUCTURE AIRPLANE LATCH SWITCH
DOOR CLOSED SWITCH
FWD
SWITCH, S110 PRESSSURE (EXAMPLE) LATCH SWITCH
CONNECTOR ELECTRICAL ISOLATION RELAY, R1104
PRESSURE SWITCH AND ISOLATION RELAY (BELOW ELECTRICAL CONNECTOR) AUXILIARY STATIC SYSTEM NO. 2 CONNECTOR CABIN PRESSURE PROBE FWD
Nose Cargo Door - Component Location Figure 102 (Sheet 4)
C64362
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A
747-400 FAULT ISOLATION/MAINT MANUAL
LATCH ACTUATOR TEST MODULE, H482
NOSE DOOR CONTROL AND LIGHTS MODULE, H121 DOOR LATCH ANNUNCIATOR, H449
DOOR CLOSED ANNUNCIATOR, H548
Nose Cargo Door - Component Location
Figure 102 (Sheet 5)
C64333
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A
747-400 FAULT ISOLATION/MAINT MANUAL
PREREQUISITES
MAKE SURE THESE CIRCUIT BREAKERS ARE CLOSED: 415F16, POWER DISTRIBUTION CENTER-RIGHT P415 715XX, NOSE CARGO DOOR POWER ON P715
NOSE CARGO DOOR WILL MAKE SURE THE AIRPLANE IS IN THIS CONFIGURATION:
NOT UNLATCH AND OPEN
ELECTRICAL POWER IS ON (AMM 24-22-00/201)
ELECTRICALLY. OTHER
ELECTRICAL MODES NOTE:____ FOR THE TROUBLESHOOTING OF THE EICAS MESSAGES,
NORMAL. REFER TO FIM CMC MESSAGE INDEX.
NO NO
1 MAKE SURE THE DOOR IS
21 OPERATE THE "LAMP TEST"
41 REPLACE THE LIGHT BULB. FULLY CLOSED AND LATCHED. SWITCH ON THE NOSE DOOR CON-IF THE PROBLEM CONTINUES,
DOES THE GREEN "LATCHES TROL AND LIGHTS PANEL TO DO A EXAMINE AND REPAIR THE ELEC-CLOSED" LIGHT ON THE NOSE DOOR CHECK OF THE "LATCHES CLOSED" TRICAL WIRING (WDM 52-31-14). CONTROL AND LIGHTS PANEL COME LIGHT. ON? DOES THE GREEN "LATCHES
CLOSED" LIGHT COME ON?
YES
YES
NO
22 OPERATE THE "LAMP TEST"
42 REPLACE THE ISOLATION
SWITCH ON THE LATCH ACTUATOR RELAY, R1104.
TEST PANEL TO DO A CHECK OF IF THE PROBLEM CONTINUES,
THE "LATCH CLOSED" LIGHT. REPLACE THE PRESSURE SWITCH,
DOES THE GREEN "LATCH S110. CLOSED" COME ON?
YES
NO
23 DO THE INSTRUCTIONS ON THE LATCH ACTUATOR TEST PANEL TODO A CHECK OF THE OPEN LIMIT SWITCH ON THE LATCH ACTUATORS.
DOES THE LATCH ACTUATOR OPERATE?
YES
NO
YES SEE SHEET 2
(BLOCK 3)
Nose Cargo Door Will Not Unlatch and Open Electrically.
Other Electrical Modes Normal.
Figure 103 (Sheet 1)
C86459
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