S 032-014
(5)
Remove the detector cover.
(6)
Remove the lens and lamp holder from the electronics assembly.
(7)
Remove the lamp from the lens and lamp holder.
S 032-006
S 022-007
TASK 26-16-01-402-008
3. Install the Lamp (Fig. 201)________________
A. References
(1) AIPC 26-16-01, Fig. 1
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747-400
MAINTENANCE MANUAL
(2)
AIPC 26-16-01, Fig. 2
(3)
WDM 26-16-11 thru WDM 26-16-16
B.
Access
(1)
Location Zones 122 Forward Cargo Container Compartment Forward Half RH 142 Aft Cargo Compartment RH
C.
Procedure
S 422-009
CAUTION: WHEN YOU REPLACE THE LAMP, USE ONLY ONE OF THESE LAMPS:
_______ CM376AS10, CM376AS15, GI376AS10, or GI376AS15. IF YOU USE AN INCORRECT LAMP THE SMOKE DETECTOR WILL NOT OPERATE CORRECTLY.
(1)
Put the lamp in the lens and lamp holder.
S 432-015
(2)
Put the lens and lamp holder in the correct position in the electronics assembly.
(a) Tighten the lens and lamp holder.
S 032-021
(3) Connect the applicable electrical connector in the table that follows:
~................................................................ | CONNECTOR | DETECTOR | LOCATION | .................................................................. | DM7898 | M7898 | DET A - FWD CARGO SMOKE - ZONE 1 | | DM7899 | M7899 | DET B - FWD CARGO SMOKE - ZONE 1 | | DM7900 | M7900 | DET A - FWD CARGO SMOKE - ZONE 2 | | DM7901 | M7901 | DET B - FWD CARGO SMOKE - ZONE 2 | | DM4893 | M4893 | DET A - FWD CARGO SMOKE - ZONE 3 | | DM4894 | M4894 | DET B - FWD CARGO SMOKE - ZONE 3 | | DM4895 | M4895 | DET A - FWD CARGO SMOKE - ZONE 4 | | DM4896 | M4896 | DET B - FWD CARGO SMOKE - ZONE 4 | | DM4897 | M4897 | DET A - AFT CARGO SMOKE - ZONE 1 | | DM4898 | M4898 | DET B - AFT CARGO SMOKE - ZONE 1 | | DM4899 | M4899 | DET A - AFT CARGO SMOKE - ZONE 2 | | DM4900 | M4900 | DET B - AFT CARGO SMOKE - ZONE 2 | | DM7902 | M7902 | DET A - AFT CARGO SMOKE - ZONE 3 | | DM7903 | M7903 | DET B - AFT CARGO SMOKE - ZONE 3 | | DM7904 | M7904 | DET A - AFT CARGO SMOKE - ZONE 4 | | DM7905 | M7905 | DET B - AFT CARGO SMOKE - ZONE 4 | 2............….............….....................................1
S 432-012
(4) Put the gasket and cover on the detector.
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(5) S 242-022Install and tighten the screws to seal the detector.
NOTE:____ The detector cover must be air tight.
(6) S 862-013Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P7 panel: (a) 7H14, CARGO SMOKE DETECT LWR A (b) 7H15, CARGO SMOKE DETECT LWR B
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747-400 MAINTENANCE MANUAL
SMOKE DETECTOR - REMOVAL/INSTALLATION
_____________________________________
1. General_______
A. This procedure contains two tasks. The first task removes the smoke detector. The second task installs the smoke detector.
B. There are eight smoke detectors in the right side of the forward lower cargo compartment. There are eight more smoke detectors in the aft lower cargo compartment.
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