TM 1-1520-240-MTF2-5PRIOR TO MAINTENANCE TEST FLIGHT (CONT.) Before Interior Check (Cont.) 20. TSEC/KY-100 Setup — Turn system ON, loadkeys and set up as necessary. A pass tone isheard in headset and “KEY N” (where ’N’ is thekey location) displayed on Z-AVH for asuccessful load.21. Turn TSEC/KY-100 — OFF.22. CARGO RAMP AND DOOR — Check operation(Refer to Section IV).B*23. CARGO HOOKS — Check operation asrequired (Refer to Section IV).24. WINCH — Check operation as required (Referto Section IV).25. Heating Vent Blower Operation — Check (Referto section IV).26. POWER XFR NO. 1 and POWER XFR NO. 2switches — OFF. Check NO. 1 and NO. 2 HYDFLT CONTR caution lights on.27. APU GEN switch — OFF. Check NO. 1 and NO.2 RECT OFF caution lights on.28. APU START switch — OFF. Check APU ON712 caution 714A advisory light out.29. BATT switch — OFF.INTERIORForward Cabin1-1.1. Flight Control Closet.a. Hydraulics lines — Check for leaks andsecurity.
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