(b)  
The MAIN DECK CARGO warning light on the fire control module M7326 (P5) comes on.

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747-400 MAINTENANCE MANUAL
 (c) (d)  The master WARNING lights come on.The alarm bell operates on the flight deck.
 (6)  S 865-092Release the FIRE/OVHT TEST switch.
 (7)  S 715-093Look for these flight deck effects: (a) The MAIN DECK CARGO warning light on M7326 goes off. (b) The master WARNING lights goes off. (c) The alarm bell stops.
 (8)  S 715-094The "MN DK CGO 1 LP A" EICAS message shows.
 (9)  S 865-233Open these circuit breakers: (a) P7 Overhead Circuit Breaker Panel 1) 7H16 CARGO SMOKE - MAIN DECK ZN 1-8 DET A 2) 7H17 CARGO SMOKE - MAIN DECK ZN 1-8 DET B
 S 415-180

 (10)
 Connect the electrical connector DM5171 from the main deck cargo compartment smoke detector.

 S 865-096

 (11)
 Close these circuit breakers:

 (a)  P7 Overhead Circuit Breaker Panel 1) 7H16 CARGO SMOKE - MAIN DECK ZN 1-8 DET A 2) 7H17 CARGO SMOKE - MAIN DECK ZN 1-8 DET B
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 S 915-225
 (12) Use this table to do the test for the other smoke detectors:
 ~................................................................. | SMOKE | CIRCUIT | EICAS MESSAGES | | DETECTOR | BREAKER ......................................... | CONNECTOR | | (DOES NOT APPEAR) | (DOES APPEAR) | ...................................................................
 | DM5172  | 7H16, 7H17  |  FIRE MN DK FWD  | MN DK CGO 1 LP B  |
 | DM5173  | 7H16, 7H17  |  FIRE MN DK FWD  | MN DK CGO 2 LP A  |
 | DM5174  | 7H16, 7H17  |  FIRE MN DK FWD  | MN DK CGO 2 LP B  |
 | DM5175  | 7H16, 7H17  |  FIRE MN DK FWD  | MN DK CGO 3 LP A  |
 | DM5176  | 7H16, 7H17  |  FIRE MN DK FWD  | MN DK CGO 3 LP B  |
 | DM5177  | 7H16, 7H17  |  FIRE MN DK FWD  | MN DK CGO 4 LP A  |
 | DM5178  | 7H16, 7H17  |  FIRE MN DK FWD  | MN DK CGO 4 LP B  |
 | DM5179  | 7H16, 7H17  |  FIRE MN DK FWD  | MN DK CGO 5 LP A  |
 | DM5180  | 7H16, 7H17  |  FIRE MN DK FWD  | MN DK CGO 5 LP B  |
 | DM5181  | 7H16, 7H17  |  FIRE MN DK MID  | MN DK CGO 6 LP A  |
 | DM5182  | 7H16, 7H17  |  FIRE MN DK MID  | MN DK CGO 6 LP B  |
 | DM5183  | 7H16, 7H17  |  FIRE MN DK MID  | MN DK CGO 7 LP A  |
 | DM5184  | 7H16, 7H17  |  FIRE MN DK MID  | MN DK CGO 7 LP B  |
 | DM5185  | 7H16, 7H17  |  FIRE MN DK MID  | MN DK CGO 8 LP A  |
 | DM5186  | 7H16, 7H17  |  FIRE MN DK MID  | MN DK CGO 8 LP B  |
 | DM5187  | 7H18, 7H19  |  FIRE MN DK MID  | MN DK CGO 9 LP A  |
 | DM5188  | 7H18, 7H19  |  FIRE MN DK MID  | MN DK CGO 9 LP B  |
 | DM5189  | 7H18, 7H19  |  FIRE MN DK AFT  | MN DK CGO 10 LP A |
 | DM5190  | 7H18, 7H19  |  FIRE MN DK AFT  | MN DK CGO 10 LP B |
 | DM5191  | 7H18, 7H19  |  FIRE MN DK AFT  | MN DK CGO 11 LP A |
 | DM5192  | 7H18, 7H19  |  FIRE MN DK AFT  | MN DK CGO 11 LP B |
 | DM5193  | 7H18, 7H19  |  FIRE MN DK AFT  | MN DK CGO 12 LP A |
 | DM5194  | 7H18, 7H19  |  FIRE MN DK AFT  | MN DK CGO 12 LP B |
 | DM5195  | 7H18, 7H19  |  FIRE MN DK AFT  | MN DK CGO 13 LP A |
 | DM5196  | 7H18, 7H19  |  FIRE MN DK AFT  | MN DK CGO 13 LP B |
　
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