TM 10-3930-669-20 VISUAL INSPECTION (1)  Open right-hand engine access cover (TM 10-3930-669-10). (2)  Inspect hydraulic oil reservoir for correct oil level (TM 10-3930-669-10). (a)  If hydraulic oil level is low, service reservoir with clean hydraulic oil (TM 10-3930-669-10). (b)  If hydraulic oil is not low, perform Step (3) below and go to Step 2 of this Fault. (3)  Close right-hand engine access cover. 2-423