(2)
WDM 26-16-11 through WDM 26-16-16

 C.
Access

 (1)  
Location Zones 122 Forward Cargo Container Compartment Forward Half R.H. 142 Aft Cargo Compartment R.H.

 D.
Procedure

 S 424-009
 (1)
Install the detector (1) with the four screws (9) and washers (8).

 (2)
Install the clamp (4) and the transition (5) to the air inlet (3).

 (3)
Install the clamp (4) and the transition (5) to the air outlet (10).

 (4)
Install the clamp (6) and the sleeve (7) to the transition (5).

 S 434-010
 S 434-021
 S 434-011
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747-400 MAINTENANCE MANUAL
 S 434-012
 (5)  Connect the applicable electrical connector (2) 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 - FWD CARGO SMOKE - ZONE 2 | | DM4900 | M4900 | DET B - FWD CARGO SMOKE - ZONE 2 | | DM7902 | M7902 | DET A - FWD CARGO SMOKE - ZONE 3 | | DM7903 | M7903 | DET B - FWD 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 434-024
 (6)  Install the insulation removed around the smoke detector.
 E. Detector Installation Check
 S 864-013
 (1)  
Supply electrical power (AMM 24-22-00/201).

 S 864-014

 (2)  
Remove 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

 S 864-015
 (3) Make sure that these circuit breakers on the P7 panel are closed:
 (a)  
7F8, EIU L

 (b)  
7F9, EIU C

 (c)  
7F15, EIU R

 S 864-016
 (4)  On the forward electrical control panel, P9, set the EIU select switch to the L or R position.
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 (5)  S 864-022On the forward electrical control panel, set the display to STATUS. (a) Make sure that the applicable EICAS fire detection messages do not show on the EICAS display after the momentary power-up display shows.
 (6)  S 864-018Remove electrical power if it is not necessary (AMM 24-22-00/201).

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