TM 5-1940-277-34TROUBLESHOOTING PROCEDURES (Continued)MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION2.SUDDEN LOSS OF POWER WITH HEAVY BLACK SMOKEStep 1.Visually inspect air cleaner for obstruction or clogging. Also inspect air intake slots from aft cockpit to engine compartment (refer to TM 5-1940-277-20).a.Clear any obstructions to air flow. Clean dirty air filter (refer to TM 5-1940-277-20).b.Test for faulty turbocharger.1.Remove air silencer (refer to TM 5-1940-277-20).2.Check for free rotation of turbine wheel.3.Repair faulty turbocharger (refer to page 5-231).c.If no air obstructions go to step 2.Step 2.Test for faulty injector (refer to page 2-261).a.Replace injector (refer to TM 5-1940-277-20).b.If injector satisfactory contact supervisor.Change 12-5
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