(4)
Install the locks for the body and wing gear doors.
S 494-019
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A
747-400
MAINTENANCE MANUAL
FORWARD BULKHEAD WHEELWELL AIRFLOW SIGNAL CONDITIONER
SEE A
AIR CONDITIONING EQUIPMENT BAY
BOLT (4 PLACES)
FWD
AIRFLOW SIGNAL CONDITIONER
ELECTRICAL CONNECTOR
SUPPORT
ANGLE
(2 PLACES)
A
Airflow Signal Conditioner Installation Figure 401
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A
747-400 MAINTENANCE MANUAL
D. Remove the Signal Conditioner
S 034-006
(1)
Disconnect the electrical connector from the signal conditioner.
S 034-007
(2)
Remove the bolts that hold the signal conditioner to the support angles.
S 024-024
(3)
Remove the signal conditioner.
TASK 21-51-17-404-008
3. Airflow Signal Conditioner Installation (Fig. 401)_______________________________________
A. References
(1)
21-00-00/201, Air Conditioning
(2)
24-22-00/201, Manual Control
(3)
AMM 45-10-00/201, Central Maintenance Computer System
(4)
IPC 21-51-17 Fig. 2
(5)
SSM 21-53-01
(6)
WDM 21-53-11
B. Access
(1) Location Zone
136 Wing Landing Gear Well, RH
C. Install the Signal Conditioner
S 424-009
(1) Put the signal conditioner in its position.
(a) Make sure the electrical receptacle points forward.
S 434-023
(2)
Install the bolts and the washers that hold the signal conditioner to the support angles.
S 434-010
(3)
Connect the electrical connector DM594 to the signal conditioner.
D. Do the Installation Test for the Signal Conditioner
S 864-011
(1)
Remove the DO-NOT-CLOSE tag and close this circuit breaker on the P415 Power Distribution Center-Right panel:
(a) 415E32, ACM MASS FLOW IND
(2)
Supply electrical power (Ref 24-22-00/201).
(3)
Push the PACK RST switch, on the P5 panel.
S 864-012
S 864-013
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S 034-025
(4)
Remove the DO-NOT-OPERATE tag from one of the PACKS selectors, on the P5 panel.
S 864-014
(5)
Operate the applicable air cooling pack (Ref 21-00-00/201).
S 714-015
(6)
Get access to the ECS EICAS maintenance page (AMM 45-10-00/201).
S 714-020
(7)
Make sure the PACK FLOW is between 1100 CFM (31 CMM) and 2900 CFM (83 CMM).
E. Put the airplane to its usual condition
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