B747-100/200 AFCS -Y/D

Y/D

1.   Y/D IS FAIL OP

2.   UPPER Y/D: CAPT SIDE , HYD 3 ,INBOARD FLAP POS, INS #1(FOR TURN COORD), ACC#1

      LOWER:  F/O, HYD 2, OUT FLAP POS, INS#2

3.  IN 747-SP FLAP POS REPLACED WITH A/S AND AIL LVDT (FOR TURN COORD INHIB)

4. LCLU GIVE A LOGIC TO Y/D FOR FINAL APP PRECISION INCREASING