TM 1-1510-218-10 8A-11 NOTE To reset, turn off approximately 5 seconds, then  to  the  NIGHT  (red)  position.    When voltage    drops    below    approximately    20 volts,  the  anticollision  light  may  become inoperative.    Normally,  NIGHT  (red)  strobe is   used   for   ground   operations   and   DAY (white) is used for flight operations. 8A-24.  ABORT START. 1.   CONDITION lever – FUEL CUTOFF. 2.   IGNITION  AND  ENGINE  START  switch  – STARTER ONLY. 3.   ITT/TGT – Monitor for drop in temperature. 4.   IGNITION  AND  ENGINE  START  switch  – OFF. 8A-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.      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. * 8A-26.  FIRST ENGINE START (GPU START). When making a Ground Power Unit (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 the Battery Start procedure for the second engine start. CAUTION Never connect an external power source to the  aircraft  unless  a  battery  indicating   a charge of at least 20 volts is in the aircraft. If the battery voltage  is  less  than  20  volts, the battery  must  be  recharged  or  replaced with  a  battery  indicating  at  least  20  volts before   connecting   external   power.      Use only  an  external  power  source  fitted  with an AN-type plug. The     BATT     switch     must     be     OFF     prior     to connecting  an  auxiliary  power  unit.    An  EXTERNAL POWER annunciator alerts the crew when an external power plug is connected to the aircraft. NOTE If  the  battery  is  partially  discharged,   the BATTERY CHARGE annunciator will illuminate   approximately   6   seconds   after external power is on-line. If the annunciator   does   not    extinguish    within 5 minutes,  refer  to  the  BATTERY  CHARGE Light    Illuminated    procedure,    Paragraph 9-28d. 1.   BATT switch – OFF. 2.   GPU – Connect. 3.   EXTERNAL POWER advisory light – On. 4.   BATT switch – ON. 5.   EXTERIOR LIGHTS switches – As required. 6.   Propeller – Clear. 7.   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   8A-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). b.   CONDITION  lever  (after  N₁  stabilizes  at or   above   12%   for   5   seconds)   –   LOW IDLE.