TM 1-1520-238-23
Change 2
1-249
1.75.
APU OPERATING INSTRUCTIONS – USING EXTERNAL POWER – continued
c. Open access door RN5 (para 2.2).
d. Verify correct APU oil level.
(1) Use access at bottom right nacelle.
(2) Indicator ball at gage (1) midpoint.
e. Secure access door RN5 (para 2.2).
f. Open access door R295 (para 2.2).
g. Close APU circuit breaker in aft avionics bay.
h. Secure access door R295 (para 2.2).
i. Open access door R325 (para 2.2).
j. Verify correct utility hydraulic fluid level (para
1.34).
k. Verify 3000 psi hydraulic pressure.
(1) Check utility pressure gage (2) on utility ser-
vice panel (3) indicates between 2600 and
3000 psi.
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