(c)
Stop the smoke.
(d)
Make sure these indications occur:
1) The warning lights go off.
2) The EICAS message, FIRE CARGO FWD, does not show.
3) The alarm bell does not operate.
S 754-015
(4) Do a test of the detection system for the aft lower cargo area as follows:
(a)
Make smoke at one of the smoke detection ports in the aft lower cargo compartment.
(b)
Make sure these indications occur: 1) The AFT warning light (red) for cargo fire on the P5 pilot's overhead panel comes on. 2) The master WARNING lights (red) on the P72 light shield
come on. 3) The alarm bell operates. 4) The EICAS message, FIRE CARGO AFT, shows on the display.
(c)
Stop the smoke.
(d)
Make sure these indications occur: 1) The warning lights go off. 2) The EICAS message, FIRE CARGO AFT, goes out of view. 3) The alarm bell does not operate.
S 754-016
(5) Do a test of the detection system for the main deck cargo area as follows:
NOTE: You must do the smoke test after you remove or replace one of
____ the cards. (You must do the test even if you remove the cards for trouble-shooting).
~.................
| Cargo Smoke |
| Detection Cards |
|(M5206 Card File)|
...................
| A01 |
| A02 |
| A03 |
| A04 |
| A05 |
| A06 |
| A07 |
| A08 |
| A09 |
| A10 |
2.................1
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747-400 MAINTENANCE MANUAL
(a) Make smoke at one of the smoke detection ports in an operational smoke detection zone in the main deck cargo area.
NOTE: You must do a test of each smoke detection port that is
____
operational.
(b)
Make sure these indications occur: 1) The MAIN warning light (red) for cargo fire on the P5 pilot's overhead panel comes on. 2) The master WARNING lights (red) on the P72 light shield
come on. 3) The alarm bell operates. 4) The EICAS message, FIRE MAIN DECK, shows on the display.
(c)
Stop the smoke.
(d)
Make sure these indications occur:
1) The warning lights go off.
2) The EICAS message does not show.
3) The alarm bell does not operate.
(e)
Do the test again for the main deck smoke detection system for each of the other smoke detection ports.
E. Put the Airplane Back to Its Usual Condition
S 864-019
(1) Remove electrical power if it is not necessary (AMM 24-22-00/201).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
MISCELLANEOUS SWITCHING MODULE - REMOVAL/INSTALLATION
_____________________________________________________
1. General_______
A. This procedure contains two tasks, one to remove and one to install the miscellaneous switching module, M7317. The module is located on the P5 pilots' overhead panel.
B. If any component in the module malfunctions, the whole unit is replaced. When removing the module, each controlled system must be isolated from the module by opening the specified circuit breakers of each system in the module. After installing the module each system controlled by the module must be tested.
C. When the modules' electrical connector, DM7317B, is disconnected, all the emergency lights in the airplane are placed in the armed condition. In the armed condition, power must be provided to the emergency lights or they will come on and will stay on until their batteries are discharged or the M7317 module connector is connected. This requires that the 28-volt dc bus 4 be energized and that the two emergency lights power circuit breakers on the P7 pilots' overhead panel be closed while DM7317B is disconnected.
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