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ARMY TM 9-2815-257-24 AIR FORCE TO 38G1-128-2 MARINE CORPS TM 10155A/2815-24/3 4-4 Section III.  DIRECT SUPPORT LEVEL TROUBLESHOOTING PROCEDURES 4-5.  GENERAL. This  section  contains  direct  support  level  troubleshooting  and  tests  for  the  engine  assembly.    Each malfunction or trouble symptom is addressed and is followed by a series of inspections or tests necessary to determine the probable cause and corrective action. 4-6.  TROUBLESHOOTING. a.    This chapter does not list all possible malfunctions that may occur, all tests or inspections that may be performed, or all corrective actions for each malfunction.  Only those checks and tests authorized for the direct support  level  are  covered.    If  a  malfunction  is  not  listed,  or  is  not  remedied  by  corrective  actions,  notify personnel at a higher maintenance level. b.    Prior to using troubleshooting table, be sure you have performed all normal operational checks. c.    These  troubleshooting  procedures assume that electrical wires are undamaged and wiring harnesses are  operable.    Conduct  continuity  checks  on  suspect  wiring  /  harnesses  as  required  prior  to  performing troubleshooting procedures in Table 4-2.    d.    Refer to Table 4-1, Malfunction Index, for determining applicable troubleshooting procedure located in Table 4-2. Table 4-1.  Malfunction Index Trouble Procedure Engine will not start 1 Engine starts and stops 2 Engine speed fluctuates (races or uneven speed) 3 Engine output drops 4 Engine runs rough   5 Engine emits white smoke 6 Engine emits black smoke 7


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