(2)
Water Source - Clean
(3)
Caps - for the inlet tubes on the detectors
(4)
G26006-1 - Tool Assembly
(5)
Water Hose
(6)
Air Hose
B.
Consumable Materials
(1)
Mild Detergent and water solution - commercially available
(2)
Tie straps - plastic self-locking (BACS8K1 or equivalent)
C.
References
(1)
AMM 26-14-00/501, Main Deck Cargo Compartment Smoke Detection System
(2)
AMM 36-00-00/201, Pneumatic System
(3)
IPC 26-14-00, Main Deck Smoke Detection System
D.
Access
(1)
Location Zones
211 Main Deck - Portal to STA 488
231 Main Deck STA 488 to 854
241 Main Deck STA 854 to 1319
251 Main Deck STA 1319 to 1720
261 Main Deck STA 1720 to 2040
271 Main Deck STA 2040 to 2360
E.
Procedure
(1)
Remove the pneumatic power (AMM 36-00-00/201).
S 867-002
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A
747-400 MAINTENANCE MANUAL
VENTURI EJECTOR VENTURI EJECTOR
FWD
FWD
AFT
MID
SEE A13
ZONE 1
2 3 4 5 6 7
8 9
10 11 14 15 1612
TO A/P LINE
G26006
AIR/ DRAIN
SMOKE DETECTOR DRAIN LINE
WATER
WITH MANIFOLD REMOVED
3
SOAP/ WATER
C L O
SOAP
1
2S
E D
OPEN
AIR
AIR
1
SOURCE
WATER
WATER SMOKE DETECTOR SOURCE WITH MANIFOLD INSTALLED
G26006-2 INLET ASSEMBLY
1 CAUTION: BACK OFF REGULATOR AND CLOSE VALVE
SMOKE DETECTOR (EXAMPLE)
PRIOR TO CONNECTING AIR AND WATER
SUPPLY OR SWITCHING FROM SOAP/WATER
A
TO WATER OR AIR. DO NOT EXCEED 10 PSI
UNLESS DIRECTED IN THE PROCEDURE.
Main Deck Cargo Compartment Smoke Detection Tubing - Cleaning/Painting
Figure 701
L48036
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400
MAINTENANCE MANUAL
S 017-037
(2) Remove the access panel in the sidewall to get access to the smoke
detectors in the Zone to be cleaned.
S 017-038
(3) Disconnect and remove the manifold above the smoke detectors.
NOTE:____ Remove the tie straps with care. The tie straps are the
white nylon straps used to secure the sleeves that connect
the tubes together. Cut the head of the tie strap rather
that the strap itself to avoid nicks or damage to the rubber
sleeves.
S 867-004
(4)
Install caps or tape over the opening of the inlet tubes on the detectors to keep out dust and debris.
S 107-040
(5)
Use the tool, G26006, and do the following steps to clean each zone:
(a)
Connect the outlet lines to each port of the piccolo tubes or sampling ports being cleaned, and secure with tie straps.
(b)
Connect the inlet lines to the line previously attached to the manifold next to detectors, and secure with tie straps.
(c)
Fill the small bottle with soap.
CAUTION: BACK-OFF THE REGULATOR AND CLOSE VALVE PRIOR TO CONNECTING
_______ AIR AND WATER SUPPLY OR SWITCHING FROM SOAP/WATER TO WATER OR AIR. DO NOT EXCEED 10 PSI UNLESS DIRECTED IN THE PROCEDURE.
(d)
Back-off the regulator and position valve 2 to Closed.
(e)
Attach shop air and water lines to the inlet assembly.
(f)
Position valve 1 to WATER.
(g)
Position valve 3 to AIR/WATER.
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