(2)
Access Panel
317A Door - Access - APU
318A Door - Access - APU
C. Procedure
S 864-002
(1) Open the circuit breakers listed below and attach DO-NOT-CLOSE identifiers:
(a) P6 Main Power Distribution Panel 1) 6C5 ALTN PWR LOOP A APU FIRE/BLD DUCT OVHT
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
26-15-02
ALL ú ú 05 Page 401 ú Jun 10/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
6. NUT
SUPPORT BRACKET
16. QUICK-RELEASE CLAMP
15. GROMMET
14. SUPPORT TUBE
13. DETECTOR ELEMENT
A
747-400
MAINTENANCE MANUAL
UPPER FIRE DETECTOR
ELEMENT M217
SEE A
1. SCREW
2. END BRACKET
3. NUT
4. SCREW
5. SCREW
7. RETAINING NUTS
8. END BRACKET
6. NUT
6. NUT 11. WASHER
12. WASHER
4. SCREW
APU UPPER FIRE DETECTOR ELEMENT M217 A
APU Fire Detector Installation
Figure 401 (Sheet 1)
LOWER FIRE DETECTOR ELEMENT M216
SEE B
AIRPLANE WIRING
9.
ELECTRICAL CONNECTOR
10.
SCREW
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
26-15-02
ALL ú ú 02 Page 402 ú Feb 10/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
17. NUT
21. P-CLAMP 20. SCREW 20. SCREW ELEMENT 17. NUT 18. DETECTOR
SUPPORT BRACKET
7. RETAINING
NUTS
19. LOCKWIRE
END BRACKET
APU LOWER FIRE DETECTOR ELEMENT M216
B
APU Fire Detector Installation
Figure 401 (Sheet 2)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
26-15-02
ALL ú ú 02 Page 403 ú Feb 10/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
2) 6C6 FIRE SW UNLOCK 3) 6H14 APU FIRE/BLD DUCT OVHT LOOP A 4) 6H15 APU FIRE/BLD DUCT OVHT LOOP B
S 014-003
(2)
Open the latches on the APU access doors.
S 014-181
(3)
Open the APU access doors.
S 434-182
(4)
Engage the suport rods for the APU access doors.
S 034-004
(5)
Disconnect the electrical connectors DM216 or DM217 (8) at both ends of detector element.
S 034-113
(6)
Put the protective caps on both ends of the detector element.
S 024-183
(7)
Remove the lockwires (19) at both ends of detector element.
S 034-005
CAUTION:_______DO NOT TWIST OR SHARPLY BEND THE DETECTOR ELEMENT. THIS MAY DAMAGE THE DETECTOR ELEMENT.
(8)
Remove the retaining nut (7) which holds the detector electrical connector (8) to support tube end bracket (2), at both ends of detector.
S 034-006
(9)
Remove the copper gasket (9) from end brackets (2), and discard the copper gasket (9).
NOTE: A new copper gasket should be installed anytime the detector
____
assembly is removed.
S 034-007
(10)
Open the quick-release clamps (16).
(11)
Remove the detector element (13) or (18).
S 024-008
TASK 26-15-02-404-020
3. Install APU Fire Detector Element (Fig. 401)
_________________________________
A. Standard Tools and Equipment
(1) Ohmmeter - Accuracy |0.001 ohm, Minimum 0.001 ohm
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：747-400 AMM 飞机维护手册 防火 FIRE PROTECTION 1(99)
