26-16-00
 ALL  ú ú 13 Page 514 ú Jun 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 ~.................................................................

 |  |  |  EICAS MESSAGES  |
 |  SMOKE  |  ......................................
 |  DETECTOR  |  |  WARNING  |  STATUS  |
 |  CONNECTOR  |  LABEL  | (DOES NOT SHOW) |  (DOES SHOW)  |

 ................................................................... |DM4899 |AFT CARGO 2 |FIRE CARGO AFT |AFT CARGO 2 LP A | | |LP A | | | ................................................................... |DM4900 |AFT CARGO 2 |FIRE CARGO AFT |AFT CARGO 2 LP B | | |LP B | | | ................................................................... |DM7902 |AFT CARGO 3 |FIRE CARGO AFT |AFT CARGO 3 LP A | | |LP A | | | ................................................................... |DM7903 |AFT CARGO 3 |FIRE CARGO AFT |AFT CARGO 3 LP B | | |LP B | | | ................................................................... |DM7904 |AFT CARGO 4 |FIRE CARGO AFT |AFT CARGO 4 LP A | | |LP A | | | ................................................................... |DM7905 |AFT CARGO 4 |FIRE CARGO AFT |AFT CARGO 4 LP B | | |LP B | | | 2.............…..............….................…..................1
 S 865-146
 (9) Close these circuit breakers on the P7 panel:
 (a)
7H14, CARGO SMOKE DETECT LWR A

 (b)
7H15, CARGO SMOKE DETECT LWR B

 S 735-265
 (10)
 Do the Ejector Test.

 (11)
 Do the Airflow Test for the Forward and Aft Cargo Sampling Tube.

 S 735-266
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 26-16-00
 ALL  ú ú 10 Page 515 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 S 735-267
 (12)
 Do the Vacuum Supply Tube Replacement Test.

 S 735-268

 (13)
 Do the Heater Check.

 S 735-269

 (14)
 Do the Smoke Test.

 TASK 26-16-00-735-256
 4. Ejector Test
 A. Standard Tools and Equipment
 (1)  
Vacuum Gauge - hand held, 0-180 inches of water (0-15 inches of mercury)

 B.
References

 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 36-00-00/201, Pneumatic System

 (3)  
AIPC 26-16-01, Fig. 1

 (4)  
AIPC 26-16-01, Fig. 2

 (5)  
WDM 26-16-11 through WDM 26-16-16

 C.
Access

 (1)  
Location Zones 122 Forward Cargo Compartment forward Half RH 142 Aft Cargo Compartment RH 221 Control Cabin LH 222 Control Cabin RH

 D.
Prepare for System Test

 S 865-248
 (1)  Open these circuit breakers on the main power distribution panel, P6, and attach DO-NOT-CLOSE tags:
 (a)  
6H1, FIRE EXTINGUISHER ENG 1&3 B

 (b)  
6H2, FIRE EXTINGUISHER ENG 1&3 A

 (c)  
6H3, FIRE EXTINGUISHER ENG 2&4 B

 (d)  
6H4, FIRE EXTINGUISHER ENG 2&4 A

 (e)  
6H5, FIRE EXTINGUISHER APU

 (f)  
6H6, FIRE EXTINGUISHER LOWER CARGO

 (g)  
6H7, FIRE SW UNLOCK

 S 865-249
 (2)  Close these circuit breakers on the overhead circuit breaker panel, P7:
 (a)  
7F23, LANDING GEAR DSP & CONT ALTN

 (b)  
7H14, CARGO SMOKE DETECT LWR A

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 26-16-00
 ALL  ú ú 16 Page 516 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
　
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