TM 10-3930-669-20 VISUAL INSPECTION (1) Position cab for service (Para 15-2). (2) Inspect fuel lines and fittings for leakage and damage. (a) If fittings are leaking, tighten or replace fuel lines (Para 4-5). (b) If fuel lines are damaged, replace fuel lines. (c) If fuel lines and fittings are not leaking or damaged, fuel lines and fittings are OK. AUDIBLE INSPECTION (1) Bleed fuel system. (2) Start engine (TM 10-3930-669-10). (3) Listen to engine operation. (a) If engine does not run rough, fuel lines were aerated.  Perform Step (4) below and go to Step 5 of this Fault. (b) If engine runs rough, perform Step (4) below and go to Step 5 of this Fault. (4) Shut down engine. 2-95