26-11-00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 865-119
(43)
Make sure the EICAS message "ENG FIRE 1 LP A" continues to show.
S 025-110
(44)
Remove the jumper wire from loop A.
S 425-111
(45)
Connect connector DT681D (loop A) to the fire detector element, T681 and tighten it to 50 to 70 pound-inches(5.6 - 7.9 newton-meters).
S 865-112
(46)
Make sure the EICAS message "ENG FIRE 1 LP A" does not show.
S 865-113
(47)
If the test is necessary for engines 2, 3, or 4, do the test again one engine at a time.
S 865-114
(48)
Make sure these conditions occur when you do the test on engine 2,
3, or 4: CMC INPUT MONITORING
~.................................................................. | ENGINE | EICAS MESSAGE | LOOP A (BIT) | LOOP B (BIT) | .................................................................... | 2 | FIRE ENG 2 | 17 | 18 | .................................................................... | 3 | FIRE ENG 3 | 19 | 20 | .................................................................... | 4 | FIRE ENG 4 | 21 | 22 | 2...........…...................….................…................1
F. AIRPLANES WITH WALTER KIDDE FIRE PROTECTION SYSTEM; Engine Overheat Detection Indication System Test
S 865-116
(1)
Push and hold the FIRE/OVHT TEST switch on the miscellaneous switching panel (P5).
S 845-107
(2)
Make sure these EICAS messages do not show:
(a)
DET FIRE/OVHT 1
(b)
DET FIRE/OVHT 2
(c)
DET FIRE/OVHT 3
(d)
DET FIRE/OVHT 4
(3)
Push the LSK next to <OTHER FUNCTIONS" on the CMC main menu.
(4)
Press the LSK next to <INPUT MONITORING.
S 865-108
S 865-118
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747-400 MAINTENANCE MANUAL
(5) S 865-110TO MONITOR THE ENGINE 1 OR 2 INPUT TO THE EIU; Write in "E/034/270/00"
(6) S 865-131TO MONITOR THE ENGINE 3 OR 4 INPUT TO THE EIU; Write in "E/034/271/00"
(7) S 865-111Push the LSK next to "-/--/---/--".
(8) S 745-112Makes sure bit 23 is set to zero.
(9) S 035-113Disconnect connector DT684A (upper forward overheat detector loop A) at engine 1 (left side).
S 485-114
(10)
Install a jumper wire in loop A between the center pin of connector, DT684A, and the connector shell of the overheat detector element, T684.
S 745-115
(11)
Make sure bit 23 on the CMC input monitoring is set to one.
S 085-116
(12)
Remove the jumper wire from loop A.
S 745-117
(13)
Make sure bit 23 on the CMC input monitoring is set to zero.
S 485-118
(14)
Install a jumper wire in loop A between the center pin and the connector shell of the overheat detector element, T684.
NOTE: Keep the loop A jumper wire connected.
____
S 745-119
(15)
Make sure bit 23 on the CMC input monitoring is set to one.
S 745-077
(16)
Make sure bit 24 (engine 1 overheat loop B) on the CMC input monitoring is set to zero.
S 035-121
(17)
Disconnect connector DT684C (upper forward overheat detector loop B) at engine 1 (left side).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 485-122
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本文链接地址：747-400 AMM 飞机维护手册 防火 FIRE PROTECTION 1(31)
