TM 55-1520-240-T 4-4.13  NO.  1  ENGINE  DOES  NOT  START  (ENGINE  FUEL  SYSTEM  FAILURE)  (Continued) 4-4.13 DID NO. 1 ENG N1 CONT CAUTION  LIGHT  COME  ON AND STAY ON DURING EN- GINE START? REFER TO TROUBLE SYMP- TOM TASK 10-1.4. YES REFER TO TROUBLE SYMP- TOM TASK 4-4.5. CHECK NO. 1 ENGINE FUEL NO SHUTOFF VALVE. IS IT OPEN? CHECK IMPENDING BYPASS BUTTON ON NO. 1 ENGINE FUEL FILTER. IS IT EXTEND- ED? REPLACE FILTER. NO CHECK FUEL TUBES FROM SHUTOFF VALVE TO EN- GINE. IS ANY TUBE KINKED OR DAMAGED? NO DISCONNECT PLUG FROM IGNITION EXCITER. DISCON- NECT FUEL LINE TO FLOW DIVIDER.  PLACE  CONTAIN- ER UNDER LINE. SET  NO. 1 ENGINE  CONDITION CONTROL  LEVER TO GROUND. SET ENGINE 1 START SW  TO MOTOR. DOES FUEL FLOW INTO CONTAINER? YES REPLACE FUEL FLOW DI- VIDER. NO REPLACE KINKED OR DAM- AGED FUEL TUBE. RECONNECT LINE TO FLOW DIVIDER. DISCONNECT FUEL CONTROL  OUTPUT  TUBE. PLACE CONTAINER BY FUEL CONTROL PORT. SET NO. 1 ENGINE  CONDITION CONTROL  LEVER TO GROUND. SET ENGINE 1 START SW TO MOTOR. DOES FUEL FLOW FROM FUEL  CONTROL  PORT? YES CHECK  INLINE  FUEL  FILTER. REPLACE  IF  CLOGGED.  IF FILTER IS CLEAN. CHECK TUBE FOR BLOCKAGE. CLEAN OR REPLACE LINE AS REQUIRED. RECONNECT OUTPUT TUBE. DISCONNECT FUEL CON- TROL INPUT TUBE. PLACE TUBE IN CONTAINER WITH NO NO. 1 ENGINE CONDl- TION CONTROL LEVER AT GROUND. SET EN- IGINE 1 START SW TO MOTOR. DOES FUEL FLOW FROM  FUEL  TUBE? REPLACE  FUEL  CONTROL. NO RECONNECT INPUT TUBE. CHECK TUBES BETWEEN FUEL TANK AND ENGINE FUEL CONTROL FOR BLOCK- AGE. CLEAN OR REPLACE TUBE AS REQUIRED. GO TO NEXT PAGE Change 2 4-75/(4-76 blank)