TM 55-2840-241-23 Table  4-1.  Troubleshooting  (Continued) Item Trouble Probable cause Remedy 28 (cont) h. Gas producer control acceleration  schedule  too lean. h.  Replace  control.  (Refer  to  para 5-12.) i. Excessive bypass flow from  power  turbine governor. j.  Dirty  fuel  control  air circuit. i. Replace governor. (Refer to para 5-13.) j. Replace fuel control. (Refer to para 5-12.) 29  Slow  to  accelerate  to power while in flight. a. Same as in preceding Trouble. a. Correct as in preceding Trouble. b. Governor linkage incorrectly   rigged. b. Check rigging. Correct linkage as required. (Refer to para 5-13.) Replace bleed control valve. (Refer to para 5-33.) 30   TOT   approximately 30°C lower than normal  at  idle. Bleed control valve stuck closed. 31  Engine  power  to  the takeoff  setting. Aircraft gas producer linkage broken or disengaged. Replace linkage or reconnect. 32   Compressor   stall during  starting  or near idle speed. (Refer to TM 55-1520-228-10  for stall   definition.) a.  Dirty  compressor. a. Clean compressor. (Refer to para 7-3.) b. Inspect and clean fuel nozzle. (Refer to para  5-15) b. Fuel nozzle has carbon buildup. c. Bleed control valve stuck closed. d. Excessively rich gas producer fuel control. c.  Replace  bleed  control  valve. (Refer to para 5-33.) d. Replace gas producer fuel control. (Refer to para 5-12.) a. Inspect and clean fuel nozzle. (Refer to pare  5-15) b. Replace bleed control valve. (Refer to para 5-33.) 33   Compressor   stall during  acceleration. a. Fuel nozzle has carbon buildup. b.  Bleed  control  valve has failed to open. c. Excessively rich gas producer fuel control. c. Replace gas producer fuel control. (Refer to para 5-12.) d. Compressor erosion. d. Inspect compressor. Correct as required. e(1). Replace the compressor case if damaged, or if erosion exceeds the acceptable  limits.  (Refer  to  Chapter 7.) e. Foreign object damage;  eroded  blades, vanes, or plastic coating. e(2). If compressor rotor assembly is damaged, replace engine. (Refer to TM   55-1520-228-23.) f. If noise monitoring indicates rub, remove and reinstall the case. (Refer to para 8-2.) f. Compressor case misaligned when installed. 4-1 0 Change 18