TM 1-1510-223-10 Change 3          8-19 NOTE The engines must not be started until after the INS  is  placed  into  the  NAV  mode  or  OFF  as required. 2.   Exterior light switches — As required. 3.   Deleted. 4.   Propeller area — Clear. 5.   ENG START switch — START-IGNITION IGN ON annunciator should illuminate and FUEL PRESS annunciator should extinguish. NOTE False fuel flow indication may be observed with the starter engaged and the CONDITION lever in FUEL CUTOFF. CAUTION If ignition does not occur within 10 seconds after moving CONDITION lever to LOW IDLE, initiate Abort Start procedure. If for any reason a starting attempt is discontinued, the entire starting se- quence must be repeated after allowing the en- gine  to  come  to  a  complete  stop  (1  minute minimum). 6.   CONDITION lever (after N₁, RPM passes 13% minimum) - LOW IDLE. CAUTION Monitor TGT to avoid a hot start. If there is a rapid rise in TGT, be prepared to abort the start before limits  are  exceeded.  During  engine  start,  the maximum allowable TGT is 1000° C for 5 sec- onds. If this limit is exceeded, initiate Abort Start procedure and discontinue start. Enter the peak temperature and duration on DA Form 2408-13. 7.   TGT and N₁ — Monitor (TGT 1000° C maxi- mum). 8.   Oil pressure — Check (60 PSI minimum). 9.   ENG START switch — Off after TGT peaks. 10.   Deleted. 11.   DC GPU disconnect — As required. If second engine is to be started using the operating en- gine’s generator, use the Battery Start Proce- dure (Second Engine). 12.   Generator switch — RESET then ON, for sec- ond engine battery start. 8-19.   *SECOND ENGINE START (GPU START). 1.   Propeller area — Clear. 2.   ENG START switch — START-IGNITION. IGN ON annunciator should illuminate and FUEL PRESS annunciator should extinguish. 3.   CONDITION lever (after N₁ RPM passes 13% minimum) — LOW IDLE. 4.   TGT and N₁ — Monitor (TGT 1000° C maxi- mum). 5.   Oil pressure — Check (60 PSI minimum). 6.   ENG START switch — OFF after TGT peaks. 7.   AC and DC GPU units — Disconnect (check aircraft  external  power  and  mission  external power annunciators extinguished). 8.   CONDITION levers — HIGH IDLE. 9.   PROP levers — HIGH RPM. 10.   #1 and #2 INVERTER switches — ON. Check INVERTER annunciators extinguished. 11.   GENERATOR switch (1) — Reset, then ON. 12.   Current limiters — Check as follows: a.   BATTERY     CHARGE     annunciator     — Check on. BATTERY CHARGE annuncia- tor should extinguish within 5 minutes fol- lowing a normal engine start. b.   #1 and #2 INV annunciators — Check ex- tinguished.  This  procedure  checks  both 400 and 500 ampere current limiters that tie aircraft bus system together. c.   Check  for  Generator  voltage  on  BATT VOLT/AMP meter. 13.   GENERATOR switch — Second switch reset, then on. NOTE To reset beacon light, turn OFF approximately 5 seconds, then ON. When voltage drops below approximately  20  volts,  the  beacon  light  may become inoperative. 14.   BEACON lights switch — Reset, then on.