TM 10-3930-659-20 5-21. ENGINE STARTING AID LINE REPLACEMENT. 1. If removed, install reducer (2), nozzles (3 and 4), and elbow (5) on air Intake tube (1). 2. If removed, install elbow (7) on engine starting aid valve (8). 3. Install engine starting aid line (6) on two elbows (5 and 7). FOLLOW-ON TASKS: • Install left engine lower sideshield (see paragraph 14-16). • Close left engine upper sideshield (see TM 10-3930-659-10). TA706888 5-61