TM  55-2840-241-23 Table   4-1.   Troubleshooting   (Continued) Item Trouble Probable   cause Remedy 6   Acceleration a.    Insufficient    time temperature    too    high during   start. attempt. b.   Reduced   battery capacity.  This  can produce   low   cranking speed. c.  High  residual  TOT  in excess of 150°C (302°F). d.   Depreciated   starter which  is  not  capable  of dry   motoring   gas producer  (Nl)  above  15 percent. e.   Gas   producer   lever (twist  grip)  in  ground idle   (start)   position   prior to   and   during   starter engagement. f.   Dirty   compressor. g.  Fuel  nozzle  valve stuck  full  open. h.   Excessive   compressor air   leaking. i.  Bleed  control  valve stuck   closed, j.   Gas   producer   fuel control   incorrectly adjusted   or   calibration has    shifted. k.   Gas   producer   fuel control   start   derichment too  rich. 1.  Engine  fuel  pump m.  Fuel  control  not  in cutoff. 7   Acceleration a.   Fuel   control   system temperature   too   low during    starting. b.  Gas  producer  fuel control   start   derichment too   lean. c.  Gas  producer  fuel control   incorrectly adjusted   or   calibration has   shifted. a.   Purge   the   engine   by   motoring with  the  gas  producer  lever  and ignition  switch  in  OFF  for approximately  10  sec  before attempting   a   second   start. b.   Recharge   battery,   replace   battery. (Refer  to  TM  55-1520-228-23.) c.   Motor   engine   with   starter   leaving gas  producer  lever  and  ignition  OFF. d.  Replace  starter.  (Refer  to  TM 55-1520-228-23.) e.   Review   starting   procedure. f.  Clean  compressor  and  bleed  valve. (Refer  to  para  7-3  and  7-7.) g.  Replace  fuel  nozzle.  (Refer  to para   5-15.) h.  Check  for  leaks.  Be  sure  that anti-ice  valve  is  fully  closed. i.  Replace  bleed  control  valve. (Refer to para 5-33. ) j.   Inspect   turbine   and   replace   faulty control   if   start   temperature   exceeds 927°C  (1700°F). k.   Adjust   start   derichment.   (Refer to para 5-12. ) 1.  Replace  fuel  pump. m.   Check   rigging. a.  Check  air  lines  and  fittings  for leaks. b.   Adjust   start   derichment   (Refer   to para   5-12.) c.  Replace  control.  (Refer  to  para 5-12.) 4-4 Change  14 allowed    for    draining    after an unsuccessful starting air    sensing    lines    leaking.