12.02.2009

B747-100/200 AFCS -PITCH TRIM


PITCH TRIM
1. FEEL COMP OUTPUT GOES TO ASTU (AUTO STAB TRIM UNIT) FOR TRIM TRESHOLD
2. 2 ELEC SIG (ARM ,CONT) FROM ROCKING LEVER GOES TO STAB INTERFACE UNIT
3. THERE ARE 2 MSW FOR GREEN BAND
4. ASTU HAS 2 PART THAT IS FAIL OP
5. ASTU #A SEND TO R/H CONT MODULE
6. FEEL COMPUTOR LIMIT TRIM DEPEND ON STAB POS AND A/S AND OPPOSE FORCE TO CONT WHEEL
7. BRAKE RELEASE LIT ON WHEN PRESS OK (STAB IS TRIMING)

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