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APU APU FUEL LINE AND SHROUD CLAMP DRAIN LINE APU SHROUD APU SHROUD DRAIN MAST
ADAPTER
ASEE APU SHROUD TEST EQUIPMENT DRAIN LINE AFT PRESSURE APU FIREWALL BULKHEAD
APU SHROUD DRAIN MAST
LEAK TEST HOSE
HOSE TEST LEAK
SHUTOFF VALVE
REGULATOR PRESSURE GAGE
PNEUMATIC AIR SUPPLY CONNECTION
APU SHROUD DRAIN LINE TEST EQUIPMENT A
APU Fuel Shroud Drain Line Figure 503
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(4) S 025-061Remove the lockwire from the APU shroud drain line coupling next to the drain mast inside the right APU access door, 316AR (AMM 06-42-00/201).
(5) S 025-065Remove the bonding clamp inside the APU access door, 316AR (AMM 06-42-00/201) next to the drain mast coupling.
(6) S 025-062Disconnect the APU shroud drain line coupling.
(7) S 495-063Attach the leak test adapter with the production seal installed on the APU shroud drain coupling.
(8) S 495-049Connect the pneumatic air supply to the leak test hose.
S 785-050
CAUTION:_______ DO NOT APPLY PRESSURE OF MORE THAN 20 PSIG. TOO MUCH PRESSURE CAN CAUSE THE APU FUEL LINE TO CLOSE AND CAUSE DAMAGE TO THE AIRPLANE.
ú ú ú ú ú ú ú ú ú ú ú (9) Slowly and continuously apply pressure to the APU shroud until thepresssure is 18 | 1 psig (124 | 7kPa).NOTE: Make sure the pressure is stable at 18 | 1 psig (124 |____7kPa).S 785-066(10) After the pressure is stable, remove the air pressure source andmake sure the pressure does not decrease more that 0.1 psi (0.7 kPa)in 5 minutes.
S 785-052 (11) Slowly and continuously decrease the pressure to zero.
S 095-053 (12) Disconnect the pneumatic air supply.
S 085-054 (13) Removed the leak test adapter from the APU shroud drain line coupling.
S 415-060 (14) Connect the APU shroud drain line coupling.
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S 425-064
(15)
Install lock wire on the shroud drain line coupling.
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