SYSTEMS POWERUP (cont)
Do not operate equipment if ECS indicator
on the pilot caution/warning panel is lit.
Failure to comply could result in damage
Do not position the AGPU under a main
rotor blade. Main rotor blade damage may
occur from intense radiant heat from the
If auxiliary fuel tank kits are installed,
ensure pylon actuator connectors are
installed on dummy connectors.
1. Operating instructions, initial switch settings, electrical,
hydraulic and pneumatic interfaces are provided for the
application of external power using AGPU.
a. Make sure that the APU circuit breaker in the aft
avionics bay (fig. 250) and the APU HOLD circuit
breaker on the pilot center circuit breaker panel (fig.
26) are open before proceeding.
AGPU operation exceeds acceptable safe
noise levels. Personnel working near or
operating will wear approved ear protection
to protect their hearing. Failure to comply
could result in permanent hearing loss.
b. Perform AGPU prestart procedures prior to placing
the AGPU online (refer to TM 55-1730-229-12 for
operator and aviation unit maintenance (AVUM)
maintenance instructions on the AGPU.
c. Attach AGPU power cable to the EXTERNAL
POWER CONNECTOR 115 VAC/DC 400 Hz
receptacle on the aircraft and apply ac power via the
AC control panel on the AGPU (refer to
TM 55-1730-229-12 for operator and AVUM
maintenance instructions on the AGPU).