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K.   714A  POWER ASSURANCE CHECK (PAC)
g.   Allow conditions to stabilize

TM-1-1520-240-MTF Army Model CH-47D Heilcopter (EIC:RCD) Manual
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TM 1-1520-240-MTF 4-24 1-36. 1.  Maximum Continuous Power (MCPC)/Maximum Power Check (MPC): a.   Stabilize airspeed at 120 KIAS. with RRPM 100%. b.   Pilot’s or Copilot’s altimeter set to 29.92. c.   Determine    required    minimum    TRQ    for Maximum Continous Power Check (MCPC) from figure 5-11. (not to exceed 123%) and the  maximum  continuous  N1  speed  from figure 5-14 (Refer to Section V.) for MCPC. d.   Determine    required    minimum    TRQ    for Maximum Power Check (MPC) from figure 5-12.    (not    to    exceed    123%)    and    the maximum N1 speed from figure 5-14 (Refer to Section V.) for MPC. e.   ENG   COND   lever   of   engine   not   being checked — Slowly retard towards GND until the     predetermined     minimum     required torque  (from  step  c  -  above)  is  attained. Ensure  that  ENG  PTIT  for  engine  being checked    does    not    exceed    the    MCPC temperature limit from figure 5-13 (Refer to Section V.) or the maximum continuous N1 speed.    If    MCPC    temperature    limit    or maximum continuous N1 speed is reached prior  to  required  minimum  TRQ  being attained, stop the PAC on this engine, and proceed to step j. f.   Raise THRUST CONT lever once the ENG COND   lever   is   in   the   GND   position,   if required, to obtain minimum TRQ while ensuring the maximum PTIT or maximum continuous  N1  limits  of  figures  5-14  and 5-13 respectively (Refer to Section V) are not exceeded.







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