TM 55-1520-240-23-6
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BLEED UTILITY RESERVOIR/COOLER, APU PUMP/MOTOR AND PUMP (WITHOUT
EXTERNAL POWER)
(Continued)
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25.
Have helper operate handpump (14).
26.
Listen for APU motor/pump (17) to rotate. While
motor/pump is rotating, loosen nut (38) of case
drain tube (39) of return control module (40). Let
fluid flow until air-free Tighten nut.
27.
Stop operating pump (14).
28.
Repeat steps 1 and 2.
29.
Working in cockpit, set APU switch (36) on
ELECT panel (37) to OFF.
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