TM 10-3930-669-20 VISUAL INSPECTION (1) Open engine access cover (TM 103930- 669-10). (2) Remove heater cable from heater valve (Para 16-11). (3) Actuate heater valve and inspect operation. (a) If valve sticks or actuates freely, replace valve. (b) If valve does not stick and actuates correctly, valve is OK. (4) Install heater cable on heater valve. VISUAL INSPECTION (1) Inspect heater cable for damage. (a) If cable is damaged, replace cable (Para 16-10). (b) If cable is not damaged, cable is OK. (2) Install heater temperature control. (3) Close engine access panel (TM 10-3930- 669-10). 2-119