26-21-00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 865-016
(7) Close these circuit breakers:
(a) P6, Main Power Distribution Panel 1) 6H1, FIRE EXTINGUISHER ENG 1&3 B 2) 6H2, FIRE EXTINGUISHER ENG 1&3 A 3) 6H3, FIRE EXTINGUISHER ENG 2&4 B 4) 6H4, FIRE EXTINGUISHER ENG 2&4 A
S 865-017
(8) Push the TEST 1 and TEST 2 switches at the same time.
(a) Make sure the ENG 1, 2, 3 and 4 lights do not come on.
E. Put the airplane back to its usual condition.
S 865-019
(1) Remove electrical power if it is not necessary (AMM 24-22-00/201).
TASK 26-21-00-735-020
3. Squib Discharge Circuit Test____________________________
A. Special Tools and Equipment
(1)
17MIT6504017 - Lock - Drive Unit, Leading Edge Flap
(2)
Squib Protective Covers
M83723/60-112-AN or AC
(3)
G26001-105 - Squib Test Box
B. Standard Tools and Equipment
(1)
Voltmeter - 28 vdc
(2)
Resistor - 10 kohms or greater
(3)
Multimeter - Digital Multimeter Fluke 87 or equivalent
C. References
(1)
AIPC 26-21-03, Fig. 1
(2)
AMM 20-41-02/201, Electrostatic Discharge Sensitive Devices
(3)
AMM 24-22-00/201, Manual Control
(4)
AMM 27-81-00/201, Leading Edge Flap System
(5)
WDM 26-21-01, WDM 26-21-02, WDM 26-21-03, WDM 26-21-04
D. Access
(1) Location Zone
221 Control Cabin LH
222 Control Cabin RH
514 Krueger Flap No.1, Left
614 Krueger Flap No.1, Right
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
E. Prepare for the Tests
S 865-261
WARNING: DO NOT TOUCH THE SQUIB BEFORE YOU DO THE PROCEDURES FOR DEVICES
_______ THAT ARE SENSITIVE TO ELECTROSTATIC DISCHARGE. ELECTROSTATIC DISCHARGE CAN CAUSE THE FIRE BOTTLE TO RELEASE ITS CONTENTS SUDDENLY AND CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(1) Before you touch the squib, do the procedure for devices that are sensitive to electrostatic discharge (AMM 20-41-02/201).
S 865-232
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LE AND TE
_______ FLAPS AND FLAP DRIVE MECHANISMS BEFORE YOU MOVE THE FLAP CONTROL LEVER. WITH HYDRAULIC POWER REMOVED, THE FLAPS WILL MOVE AUTOMATICALLY BY ELECTRICAL POWER WHEN YOU MOVE THE FLAP CONTROL LEVER. IF THE FLAPS MOVE INJURY TO PERSONS CAN OCCUR.
WARNING: INSTALL LOCKS TO PREVENT MOVEMENT OF THE FLAPS
_______ (AMM 27-81-00/201). IF THE LOCKS ARE NOT INSTALLED INJURY TO PERSONS CAN OCCUR.
(2)
Extend the wing leading edge flaps to get access to the engine bottle electrical connectors.
S 495-023
(3)
Install safety locks on all extended leading edge flaps where persons are near (AMM 27-81-00/201).
S 865-170
(4)
Open these circuit breakers:
(a) P6, Main Power Distribution Panel
1) 6H1, FIRE EXTINGUISHER ENG 1&3 B
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú 中國航空網 www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：747-400 AMM 飛機維護手冊 防火 FIRE PROTECTION 2(53)
