TM 1-1510-225-10 8-12 (1)  75% maximum – LOW IDLE. (2)  85% maximum – HIGH IDLE. (3)  85% maximum – Ground Operations. 11.  AVIONICS MASTER PWR – ON. 12.  STANDBY HORIZON – ON and uncaged. 13.  EFIS POWER switches – ON. 14.  AP/TRIM POWER switch – ON. 15.  Autopilot self-test – Monitor. a.  Allow   3-4   minutes   for   gyros   to   erect, HDG and ATTITUDE flags clear. b.  AP    FAIL     and     AP    TRIM    FAIL     – Annunciators illuminate upon initial application   of   AP/TRIM   POWER   and then extinguish (followed by an audio test tone)  after  successful  completion  of  the self-test.    Allow  60  seconds  after  gyros are valid. c.   Repeat self-test on copilot side. CAUTION Taxi with caution. The autopilot temporarily engages the servos during the automatic    self-test.        Be    prepared    to overpower the autopilot as required. NOTE Illumination   of   the   AP   FAIL   annunciator other than during initial power-up indicates a   failure.      This   failure   annunciation   will result  in  power  being  removed  from  the roll, pitch, yaw, pitch trim, and rudder trim servos.      The   flight   director   may   remain functional  depending  upon  the  nature  of the    failure.        The    continuous    self-test feature   may   also   inhibit   flight   director, autopilot,   and   electric   trim   use   without illumination of the AP FAIL annunciator. 16.  Engine instruments – Check. 8-24.  ABORT START. 1.  CONDITION lever – FUEL CUTOFF. 2.  IGNITION  AND  ENGINE  START  switch  – STARTER ONLY. 3.  ITT – Monitor for drop in temperature. 4.  IGNITION  AND  ENGINE  START  switch  – OFF. 8-25.  ENGINE CLEARING. 1.  CONDITION lever – FUEL CUTOFF. 2.  IGNITION  AND  ENGINE  START  switch  – OFF (1 minute minimum). CAUTION Do     not     exceed     starter     limitation     of 40 seconds on and 60 seconds off for two starting    attempts    and    engine    clearing procedure.    Allow  30  minutes  off  before additional starter operation. 3.  IGNITION  AND  ENGINE  START  switch  – STARTER   ONLY   (15   seconds   minimum, 40 seconds maximum). 4.  IGNITION  AND  ENGINE  START  switch  – OFF. * 8-26.  FIRST ENGINE START (GPU START). NOTE After   turning   on   the   GPU,   wait   a   full 10 seconds  before  starting  the  engines  to allow    the    ETM    to    complete    its    setup procedures. When making a GPU start, the left engine should be   started   first   due   to   the   GPU   receptacle   being located  adjacent  to  the  right  engine.    Normally,  only one engine is started utilizing the GPU, reverting to a battery start procedure for the second engine start. 1.  Propeller area – Clear. 2.  Engine – Start. a.  IGNITION  AND  ENGINE  START  switch –   ON.      IGN   ON   light   illuminated   and associated FUEL PRESS light extinguished. CAUTION If ignition does not occur within 10 seconds   after   moving    the    condition lever to LOW IDLE, initiate Engine Clearing procedure,   Paragraph   8-25.      If   for   any reason the starting attempt is discontinued, the  entire  starting  sequence must be repeated after allowing the engine to   come   to   a   complete   stop   (1-minute minimum).