APPLY POWER USING APU
Pull rotor blades (1) around so that one aft
or forward blade points straight out 90º from
Check that APU fuel shutoff valve (2) is OPEN.
Check that APU start accumulator gage (3) reads
at least 3,000 psi. If gage reads less, operate
hand pump (4) to increase reading to 3,000 psi
or until pressure stabilizes.
If pressure stabilizes at less than
3,000 psi it indicates a bottomed
piston in the accumulator. A stabilized
pressure of 2,700 psi or more is
enough to start the APU.