(a)
Make sure the applicable PACK OUT TEMP becomes stable at 35-135°F (2-60°C).
(b)
Make sure the applicable PACK FLOW becomes stable at 110-290 CFM (31-83 meters cubed per minute). 1) If the PACK FLOW does not show a value, push the PACK RST
switch-light, on the P5 panel.
NOTE: ON AIRPLANES WITH A 210U130-9 PACK CONTROLLER,
____ the PACK FLOW values will not show if the flow is greater than 3500 CFM for 15 seconds. This condition may occur when the packs are started.
TASK 21-00-00-862-021
7. Remove Conditioned Air Supplied by a Cooling Pack_________________________________________________
A. References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 36-00-00/201, Pneumatic System
B. Procedure
S 862-031
(1) Turn the applicable PACK selectors to the OFF positions.
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(2) S 862-024Set the TRIM AIR switch to off.
(3) S 862-025Remove pneumatic pressure (AMM 36-00-00/201).
(4) S 862-027Remove electrical power (AMM 24-22-00/201).
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747-400 MAINTENANCE MANUAL
AIR CONDITIONING SYSTEM OIL SMOKE/FUME CONTAMINATION (REMOVAL) -
________________________________________________________________ MAINTENANCE PRACTICES
_____________________
1. General_______
A. There is one task in this procedure. The oil fumes and the smoke from an APU/engine failure can get into the airplane cabin and cause contamination of the conditioned air. This procedure gives instructions to remove the oil contamination from the air conditioning and pneumatic systems. You must first isolate the cause of the oil contamination and repair the problem before you do this procedure.
TASK 21-00-01-802-022
2. Removal of Oil Contamination from the Air Conditioning and Pneumatic Systems____________________________________________________________________________
A. References
(1)
AMM 21-00-00/201, Air Conditioning
(2)
AMM 21-31-00/001, Cabin Pressure Control System
(3)
AMM 21-42-00/001, Supplemental Heating Systems
(4)
AMM 21-43-00/001, Forward Cargo Compartment Heating System
(5)
AMM 21-44-00/001, Aft Cargo Compartment Heating System
(6)
AMM 21-51-05/201, Water Separator
(7)
AMM 24-22-00/201, Manual Control
(8)
AMM 36-00-00/201, Pneumatic System
(9)
AMM 36-11-14/401, Pneumatic Ground Connection Check Valve
(10)
AMM 49-11-00/201, Auxiliary Power Unit
(11)
AMM 52-11-00/001, Main Entry Doors
(12)
AMM 71-00-00/201, Power Plant
B. Access
(1)
Location Zones
133 Air Conditioning Equipment Bay, Left
134 Air Conditioning Equipment Bay, Right
(2)
Access Panels
191NL Air Conditioning Access Door
192HR Air Conditioning Access Door
C. Procedure
S 012-001
(1) Open the access doors to the air conditioning bays.
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(2) S 022-002Remove the water separators (AMM 21-51-05/201).
(3) S 162-003Clean the coalescer bags in the water separators.
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