TM 55-2840-241-23 Table  4-1.  Troubleshooting    (Continued) Item Trouble Probable    cause Remedy 5 (cont) c.    Cracked accumulator(s). d.   Sticking   double   check valve. e.  Pc  filter  clogged. f. Cracks   in   compressor discharge   air   tubes   or outer   combustion   case. g.    Compressor    discharge air   tube   seal   leaks. h.    Insufficient    fuel supply  to  gas  producer fuel   control. i.   Insufficient   fuel pressure  to  fuel  pump. j.   Anti-icing   valve   open and  cabin  heat  on. k.   Gas   producer   fuel control   start   derichment too   lean. l.   Gas   producer   fuel control  by-pass  valve stuck   open. m.   Gas   producer   fuel control   incorrectly adjusted    or    calibration has    shifted. n.  Fuel    nozzle    partially clogged   with   carbon. o. Fuel  nozzle   check valve    stuck    partially open. p.   Faulty   power   turbine governor. q.   Dirty   compressor. r.   Foreign   object   damage or  erosion  to  compressor. s.   Contaminated   fuel control  fuel  filter. c.  Replace  as  required.  (Refer to para   5-16.) d.  Replace   valve.   (Refer   to   para 5-14.) e.  Check  and  clean  Pc  air  filter. (Refer  to  para  5-11.)  Clogging  may be  caused  by  dirt,  moisture  or  ice. f.   Weld   repair   or   replace   parts   as applicable. If cracked compressor g.  Replace  air    tube  seals.  (Refer  to  para  3-21.1 h.   Check   fuel   system   to   ensure   all valves  are  open  and  pumps  are operative. i.   Turn   on   aircraft   boost   pump, j.   Close   anti-icing   valve   and   turn   off cabin   heat. k.    Adjust    start    derichment.    (Refer to  para  5-12.) l.   Disconnect   the   fuel   line   at   the fuel  nozzle,  flush  system  with  clean fuel.  If  the  same  condition  still exists,  replace   fuel   control.   (Refer   to para  5-12.) m.   Replace   control.   (Refer   to   para 5-12. ) n.   Clean   fuel   nozzle.   (Refer   to   para 5-15. ) o.  Replace  fuel   nozzle.   (Refer   to para 5-15. ) p. Replace   governor.   (Refer   to   para 5-13. ) q.   Clean   compressor   and   bleed valve. (Refer to para 7-3 and 7-7. ) r.   Inspect   compressor.   (Refer   to   para 7-9 or 7-10, ) s.   Clean   or   replace   the   filter.   (Refer to  para  5-12.) Change   23   4-3 discharge air tubes or outer combustion case is suspected, refer to TM 1-1520-254-23 Tecnical Manual Aviation Unit Main- tenance (AUM) andAviation Intermediate Maintenance (AVIM) Manual Nondestructive Inspection Procedure for OH-58 Helicopter Series.