TM 1-1510-218-10 8A-12 CAUTION Monitor  ITT/TGT  to  avoid  a  hot  start.     If there is a rapid rise in ITT/TGT, be prepared to abort the start before limits are exceeded. During engine start, the maximum allowable ITT/TGT is 1000 °C for 5    seconds.        If    this    limit    is    exceeded, discontinue    start    and    use    Abort    Start procedure,  Paragraph  8A-24.    Record  the peak    temperature    and    duration    on    DA Form 2408-13-1. c.   ITT/TGT    and    N₁    –    Monitor    ITT/TGT 1000 °C maximum.  N₁ minimum 56%. d.   Oil pressure – Check (60 psi minimum). e.   IGNITION  AND  ENGINE  START  switch – OFF after 50% N₁. 8.   Engine and systems instruments – Check. 9.   CONDITION  lever  –  HIGH  IDLE.    Monitor ITT/TGT as the condition lever is advanced. 10.   GPU disconnect – As required. CAUTION Do    not    turn    on    generators    with    GPU connected. 11.   GEN switch – RESET then ON. 12.   BATTERY CHARGE light – Monitor. NOTE After  starting  the  first  engine  with  a  GPU, the    second    engine    is    normally    started using   a   battery   start.      If   a   GPU   start   is required  or  desired  for  the  second  engine start,  use  the  Second  Engine  Start  (GPU Start) procedure, Paragraph 8A-27; otherwise,   use   the   Second   Engine   Start (Battery Start) procedure, Paragraph 8A-23. * 8A-27.  SECOND ENGINE START (GPU START). 1.   Propeller area – Clear. 2.   Engine – Start. a.   IGNITION  AND  ENGINE  START  switch –  ON.  IGN ON light illuminated and the associated FUEL PRESS light extinguished. CAUTION If ignition does not occur within 10 seconds after moving condition lever to low idle, initiate Engine Clearing procedure,   Paragraph   8A-25.      If   for   any reason  a  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 RPM stabilizes at or above 12% for 5 seconds) – LOW IDLE. CAUTION Monitor  ITT/TGT  to  avoid  a  hot  start.     If there is a rapid rise in ITT/TGT, be prepared to abort the start before limits are exceeded. During engine start, the maximum allowable ITT/TGT is 1000 °C for 5    seconds.        If    this    limit    is    exceeded, discontinue    start    and    use    Abort    Start procedure,  Paragraph  8A-24.    Record  the peak    temperature    and    duration    on    DA Form 2408-13-1. c.   ITT/TGT  and  N₁  –  Monitor.    ITT  /TGT 1000 °C maximum.  N₁ minimum 56%. d.   Oil pressure – Check 60 psi minimum. e.   IGNITION  AND  ENGINE  START  switch – OFF after 50% N₁. 3.   Engine and systems instruments – Check. 4.   Right PROP lever – FEATHER. 5.   GPU – Disconnect. 6.   Right PROP lever – HIGH RPM. 7.   INVERTER switches – ON, check INVERTER lights OFF. 8.   GEN switches – RESET, then ON. a.   AC/DC power – Check frequencies, volts and loads. b.   Frequency and Volts: (1)   AC frequency 394 to 406 Hz. (2)   AC voltage – 104 to 124 Vac. (3)   DC voltage – 28.0 to 28.5 Vdc. c.   DC loads: Parallel within 10%. (1)   75% maximum – LOW IDLE. (2)   85% maximum – HIGH IDLE.