HYDRAULIC SYSTEM LEAK CHECK continued
b. Contaminated Aircraft resample.
(1) Open access panel R325 to gain access to ground service panel.
(2) Locate AGPU with dual hydraulic manifold which has been properly sampled and cleared for operation in
accordance with paragraph 7.2.5. Ensure the reservoir is full.
Do not put AGPU under a main rotor blade. The extreme heat of the AGPU exhaust may cause main
rotor blade damage.
Operation of the AGPU is to be performed only by a trained, qualified operator. Refer to instruction
plate on hydraulic control panel door for important setup and shutdown procedures for the AGPU
(3) Position AGPU parallel to right wing tip (TM 1-1520-238-23, paragraph 1-72 and 1-73) and TM
1-1520-Longbow/Apache (IETM). Connect AGPU to aircraft primary and utility GSE connectors in accor-
dance with TM 55-1730-229-12, paragraph 2-7; TM 1-1520-238-23, paragraphs 1-72 and 1-73; and TM
(4) Connect hose to drain connector on AGPU dual service manifold drain port and place opposite end of hose
in clean 10 gallon (minimum) container. Any AGPU adapter hose can be used as drain hose after removal
of quick disconnect couplings at both ends.
(5) Ensure bypass/flush and fill/drain valves are closed.
Refer to the pilot/copilot gunner station accessing safety precautions in the appropriate technical
manual prior to entering pilots station.
(6) Enter pilots station.
Personnel are required to use the aircraft Intercom Communication System (ICS) to maintain voice
communications between the person operating the flight controls and the AGPU operator.
(7) Apply external power to aircraft in accordance with TM 1-1520-238-23, paragraph 1.70, or TM
1-1520-Longbow/Apache (IETM). Establish voice communication using ICS.
(8) Apply external air to aircraft in accordance with TM 1-1520-238-23, paragraph 1.71, or TM 1-1520-Long-
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