(b)
Upper deck DT1648
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A
747-400 MAINTENANCE MANUAL
(c)
Crew Rest Area DT1937
(d)
Forward Main Deck DT1929
(e)
Aft Main Deck DT1934
(f)
Lower Forward Cargo DT1657
(g)
Lower Aft Cargo DT1658
S 034-007
(4)
Cut the lockwire on the duct temperature sensor and discard it.
S 034-019
(5)
Remove the two screws that attach the temperature sensor to the duct.
S 024-008
(6)
Remove the duct temperature sensor.
TASK 21-61-16-404-009
3. Zone Duct Tmperature Sensor Installation________________________________________
A. References
(1)
20-11-28/401, Lockwire
(2)
25-59-01/401, Main Deck Cargo Lining Panels
(3)
32-00-30/201, Landing Gear Door Locks
(4)
AMM 45-10-00/201, Central Maintenance Computer System
(5)
IPC 21-61-07 Fig. 1 and 2, 21-61-64 Fig. 1
(6)
IPC 21-28-51 Fig. 2, 21-61-07 Fig. 1 and 2, 21-61-64 Fig. 1
(7)
WDM 21-45-61, 21-61-13, 21-61-22, 21-61-37, 21-61-47, 21-61-82, 21-61-87
(8)
SSM 21-45-08, 21-61-01, 21-61-02, 21-61-08, 21-61-15, 21-61-16
B. Access
(1)
Location Zone
134 Air Conditioning Equipment Bay, RH
138 Body Landing Gear Well, RH
233 Area Aft of Crew Rest, LH
243 Area Above Ceiling, LH
244 Area Above Ceiling, RH
(2)
Access Panel
192BR Air Conditioning Access Panel
C. Procedure
S 424-010
(1)
Install the duct temperature sensor in the duct.
(2)
Install the two screws on the duct temperature sensor.
S 434-020
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747-400 MAINTENANCE MANUAL
S 434-011
(3)
Install the lockwire from the screws to the adjacent overtemperature switch (AMM 20-11-28/401).
S 434-012
(4)
Connect the electrical connector to the duct temperature sensor:
(a)
Flight Deck DT1647
(b)
Upper Deck DT1648
(c)
Crew Rest Area DT1937
(d)
Forward Main Deck DT1929
(e)
Aft Main Deck DT1934
(f)
Lower Forward Cargo DT1657
(g)
Lower Aft Cargo DT1658
D. Do a Check of the Temperature Sensor
S 864-021
(1)
Push the ZONE RST switch on the P5 overhead panel.
S 864-022
(2)
Set the CMCS EXISTING FAULTS page for air conditioning
(AMM 45-10-00/201).
S 714-023
(3)
Make sure there are no messages for the duct temperature sensors on the CMC EXISTING FAULTS page.
E. Put the Airplane Back to its Usual Condition.
S 414-013
(1) If you installed the sensor for the crew rest area, the forward main deck, or the aft main deck, install the ceiling panel (AMM 25-59-01/401) that you removed.
S 864-025
WARNING: REFER TO 32-00-30/201 FOR THE REMOVAL OF THE LOCKS FOR THE
_______ LANDING GEAR DOORS. THE DOORS CAN MOVE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO THE EQUIPMENT.
(2)
If you installed the sensor for the aft lower lobe cargo compartment, remove the door locks for the body landing gear and the wing landing gear (AMM 32-00-30/201).
S 414-015
(3)
If you installed the sensor for the forward lower lobe cargo compartment, close the access door for the air conditioning equipment bay (AMM 06-09-03/201).
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