I TM 5-5420-226-20-1 Symptom-73 DETAILED TROUBLESHOOTING PROCEDURE SUPPORT    SYSTEM   -  PERSONNEL HEATER FROM STEP (Continued) B Check fuel line to    personnel heater fuel pump for damage. I Second Technician (Oprator’s Station) l    Set    PERSONNEL HEATER HI/LO switch OFF. l    Set    HEATER MASTER switch OFF, First Technician (Personnel Heater) l   Check metal fuel    line    from primer pump to personnel heater for   damage. 4 Is  fuel    line   damaged? . ( QUADRANTS REMOVED FOR CLARITY I^PRIMERPUMP_FILTER PERSONNEL HEATER FUEL PUMP I AMETALFUELLINE \ ( ~ FROM PRIMER — r PUMP d U.S. GOVERNMENT PRINTING OFFICE 1993-746-01780036 4-692 P l    Replace  fuel    line    from primer pump  to  personnel  heater fuel pump (page 7.311). l   Connect fuel line quick disconnect at personnel heater. TA107381 PIN: 049956-005