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747-400 MAINTENANCE MANUAL
 b)  Two green CLOSED lights on the Nose Cargo Door Closed Annunciator panel are on and two amber NOT CLSD lights are off.
 c) All lights on the Nose Cargo Door Control panel are off. d) The caution message DOOR NOSE CARGO is not shown on EICAS. e) After 60 seconds the status message DOOR NOSE CARGO does not show on EICAS.
 (n)
Do this test of the Latch Indication circuits.

 (o)
For each of the 16 latches, do the steps that follow:

 CAUTION: DO NOT USE MORE THAN 8 FT-LBS OF TORQUE.
_______
 1)  Use a dial indicator torque wrench to turn the manual drive of the latch actuator a minimum of 30 turns in the RETRACT direction.
 2)  Look to see these indications:
 a)  The appropriate green LATCHED light on the Nose Cargo Door Latch Annunciator panel goes off, and the amber NOT LCHD light comes on.
 b) The caution message DOOR NOSE CARGO is shown on EICAS. c) After 60 seconds the status message DOOR NOSE CARGO shows on EICAS.
 CAUTION: DO NOT USE MORE THAN 8 FT-LBS OF TORQUE.
_______
 3)  Use a dial indicator torque wrench to turn the manual drive of the latch actuator in the EXTEND direction until the latch pin is again in the fully latched position.
 4)  Look to see these indications:
 a)  The appropriate green LATCHED light on the Nose Cargo Door Latch Annunciator panel comes on, and the amber NOT LCHD light goes off.
 b)  The caution message DOOR NOSE CARGO is not shown on
 EICAS.
 5)  Erase the status message DOOR NOSE CARGO.
 6)  After 60 seconds the status message DOOR NOSE CARGO does
 not show on EICAS.
 (p) Do this test of the Electrical Lock-Out circuits: 1) Hold the DOOR CONTROL switch in the OPEN position for more than 60 seconds. 2) Look to see these indications: a) The caution message DOOR NOSE CARGO is shown on EICAS. b) After 60 seconds the status message DOOR NOSE CARGO shows on EICAS. 3) Release the DOOR CONTROL switch. 4) Look to see that the caution message DOOR NOSE CARGO is not
 shown on EICAS after the DOOR CONTROL switch is released. 5) Erase the status message DOOR NOSE CARGO.
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747-400
MAINTENANCE MANUAL

 6)  After 60 seconds the status message DOOR NOSE CARGO does
 not show on EICAS.
 7)  Disconnect relay R1104.
 NOTE:____ Relay R1104 is behind the Pressure Switch and
 Isolation Relay panel found below the H122 panel on
 the right side of the airplane.
 8)  Look to see these indications:
 a)  The caution message DOOR NOSE CARGO is shown on EICAS.
 b)  After 60 seconds the status message DOOR NOSE CARGO
 shows on EICAS.
 9)  Install relay R1104.

 10) Look to see that the caution message DOOR NOSE CARGO is not
 shown on EICAS after the relay is installed.
 11) Erase the status message DOOR NOSE CARGO.
 12) After 60 seconds the status message DOOR NOSE CARGO does
 not show on EICAS.
 13) Open the C1572 Nose Cargo Door circuit breaker.
 14) Disconnect connector D3706P from the H122 panel.
 15) Hold the SYSTEM POWER switch in the ON position and the
 DOOR CONTROL switch in the OPEN position for more than 60
 seconds.
 16) Look to see these indications: a) The caution message DOOR NOSE CARGO is shown on EICAS. b) After 60 seconds the status message DOOR NOSE CARGO
 shows on EICAS.
 17) Release the SYSTEM POWER and DOOR CONTROL switches.
 18) Connect the connector D3706P.
 19) Close the C1572 Nose Cargo Door circuit breaker.
 20) Erase the status message DOOR NOSE CARGO.
 21) Look to see these indications:
 a) The caution message DOOR NOSE CARGO is not shown on EICAS. b) After 60 seconds the status message DOOR NOSE CARGO
 does not show on EICAS.
 22) Open the C1407 Nose Cargo Door Control circuit breaker.
 23) Hold the SYSTEM POWER switch in the ON position for more
　
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