TM 55-1520-240-T 4-4.4  ENGINE START AND IGNITION SYSTEM OPERATIONAL CHECK (Continued) 4-4.4 TASK RESULT 6. Have pilot start No. 1 engine.  When NO. 1 No. 1 engine shall accelerate to 60-63% N1 as ENGINE gas producer tachometer (7) indicates indicated on tachometer (7) within  45 seconds. 50%, SET ENGINE 1 START switch (8) to Power turbine inlet temperature shall rise and then OFF.  If engine has high PTIT or hot start, go stabilize at 400°C as indicated on PTIT indicator (9). to task 4-1.2. STARTER ON light (5) shall go out when switch (8) set to OFF.  If engine does not start, go to task 4-4.12.  If light (5) stays on, replace ENGINE 1 MOTOR/START switch. CAUTION After   starting   NO.   1   ENGINE,   do   not   delay starting  NO.  2  ENGINE  more  than  3  minutes, or  motoring  engine  for  10  seconds  every  30 minutes.    The  N2  section  of  NO.  2  ENGINE starts turning when NO. 1 ENGINE is started; however,   the   lubrication   system   of   NO.      2 ENGINE  is  driven  by  the  N1  section;  which does   not   begin   to   turn   until   the   START sequence  is  initiated.    Delay  in  starting  NO. 2 ENGINE will result in excessive wear on N2 bearing package and seals. 7. Have pilot stop No. 1 engine if no further checks are to be performed. CHECK NO. 2 ENGINE START AND IGNITION SYSTEM 8. Have pilot motor No. 2 engine. ENGINE 2 STARTER ON light (6) shall come on. NO. 2 ENGINE gas producer tachometer (10) shall indicate 10 to 15%.  If ENGINE 2 STARTER ON light does not come on, go to task 4-4.10.  If NO. 2 ENGINE gas producer tachometer does not indicate 10 to 15% N1, go to task 4-4.15. TASK RESULT 9. Have pilot start No. 2 engine.  When NO. 2 No. 2 engine shall accelerate to 60-63% N1 as ENGINE gas producer tachometer (10) indicates indicated on tachometer (10) within  45 seconds. 50%, SET ENGINE 2 START switch (11) to OFF. Power turbine inlet temperature shall rise and then If engine has high PTIT or hot start, go to task 4-1.4. stabilize at 400C as indicated on PTIT indicator (12).  STARTER ON light (6) shall go out when switch (11) set to OFF.  If engine does not start, go to task 4-4.16.  If light (6) stays on, replace ENGINE 2 MOTOR/START switch. CAUTION After  starting  NO.  2  ENGINE,  do  not delay   starting   NO.   1   ENGINE   more than  3  minutes,  or  motoring  engine for    10    seconds    every    30   minutes. The   N2   section   of   NO.   1   ENGINE starts  turning  when  NO.  2  ENGINE  is started; however, the     lubrication system of NO. 1 ENGINE is driven by the N1 section; which does not begin to  turn  until  the  START  sequence  is initiated.      Delay   in   starting   NO.    1 ENGINE  will  result  in  excessive  wear on N2 bearing package and seals. 10. Have pilot stop engines. FOLLOW-ON MAINTENANCE: TM 55-1520-240-23: Hydraulic Power Off Electrical Power On Battery Disconnected END OF TASK Change 2  4-57