TM 1-1520-238-23
1-84.4
Change 4
1.27A.
APU FUEL SYSTEM PRIMING – continued
f. On pilot ELEC PWR panel (6), select BATT/
EXT PWR switch (7) to EXT PWR.
g. On ELEC PWR panel (6), press EXT PWR RE-
SET (8).
h. On pilot APU FIRE TEST panel (9), hold APU
RUN/START switch (10) to RUN position for 30
seconds.
NOTE
No more than three 0.5 inch diameter
bubbles allowed in APU bleeder hose
during the thirty second RUN period.
i. Turn off power.
(1) On pilot APU FIRE TEST panel (9), select
pilot APU RUN/START switch (10) to OFF.
(2) On pilot ELEC PWR panel (6), selectBATT/
EXT PWR switch (7) to OFF.
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