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 26-14-01
 ALL  ú ú 04 Page 702 ú Jun 10/94
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A
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MAINTENANCE MANUAL

 S 147-005
 (4)  Remove contamination and residue on the walls with a soft bristle brush.
 S 117-006
 WARNING:_______DO NOT BREATH THE VAPORS OR MIST FROM SOLVENTS. USE THEM IN AN AREA WITH SUFFICIENT AIR FLOW. USE APPROVED RESPITORY PROTECTION IF IT IS NECESSARY. DO NOT GET IT IN YOUR EYES. DO NOT GET THE SOLVENT ON YOUR SKIN OR CLOTHING. USE PROTECTIVE EQUIPMENT IF IT IS NECESSARY. KEEP FLAMMABLE MATERIALS AWAY FROM SOURCES OF IGNITION. SOLVENTS ARE DANGEROUS AND CAN CAUSE INJURY TO PERSONNEL.
 CAUTION: DO NOT GET SOLVENTS ON PLASTICS, CONTROL CABLES, LUBRICATED
_______ AREAS, DECALS, PAINTS, OR MARKINGS, OR DAMAGE MAY RESULT.
 (5)  
Clean the wall with solvent trichloroethane 1:1:1 or naphtha.

 S 217-007

 (6)  
Examine the inside walls for scratches or shiny areas. The inside walls must be clean and coated with non-reflective paint with no shiny areas.

 S 377-008

 (7)  
Touch-up the chamber with paint 2600-08.

 S 217-009

 (8)  
Examine the cover gasket for signs of damage before you replace the cover.

 S 427-010

 (9)  
Install the detector and do the operational test (Ref 26-14-01/401 and 26-14-00/501).

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747-400 MAINTENANCE MANUAL
 SMOKE DETECTOR EJECTOR - REMOVAL/INSTALLATION
_____________________________________________
 1.  General_______
 A.  There are two tasks in this procedure. The first is the removal of the venturi ejector in the main cargo compartment. The second is the installation of the venturi ejector in the main cargo compartment.
 B.  There are two venturi ejectors. One of the venturi ejectors is located in the fwd lower cargo compartment at STA 970 below the floor panel. The other venturi ejector is installed in the aft lower cargo compartment at STA 1530 below the floor panel. You can access the S2276 venturi ejector through the fwd end of the lower cargo comparment and the S2277 ejector through the aft end of the lower cargo compartment. Follow the procedure to remove and install the venturi ejector.
 TASK 26-14-02-004-002
 2.  Ejector Removal (Fig. 401)_______________
 A.  References
 (1)  
AMM 36-00-00/201, Pneumatic Systems

 (2)  
AIPC 26-14-51, Fig. 1

 (3)  
WDM 26-16-21 thru WDM 26-16-29

 B.  Access
 (1)  Location Zone 123 Area Below Fwd Cargo Container Compartment L.H. 124 Area Below Fwd Cargo Container Compartment R.H. 143 Area Below Aft Cargo Container Compartment L.H. 144 Area Below Aft Cargo Container Compartment R.H.
 C.  Procedure
 S 864-003
 (1) Open these circuit breakers, and attach DO-NOT-CLOSE identifiers:
 (a)  P7 Overhead Circuit Breaker Panel 1) 7H16 CARGO SMOKE - MAIN DECK ZN 1-8 A 2) 7H17 CARGO SMOKE - MAIN DECK ZN 1-8 B
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 26-14-02
 ALL  ú ú 05 Page 401 ú Feb 15/99
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747-400
MAINTENANCE MANUAL

FORWARD
MID
AFT
FWD  13 
ZONE 1  2  3  4  5  6  7  8  9  10  11  12  14  15  16 
VENTURI EJECTORS 
SMOKE DETECTOR (32) 
SEE  A 
VENTURI EJECTOR 
MAIN DECK CARGO COMPARTMENT 
LOWER CARGO 
　
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