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AFCS OPERATIONAL CHECK (Continued) - TM-55-1520-240-T-3_322
AFCS OPERATIONAL CHECK (Continued) - TM-55-1520-240-T-3_324

TM-55-1520-240-T-3 CH-47D Heilcopter Manual
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TM 55-1520-240-T 11-3.3 AFCS OPERATIONAL CHECK (Continued) 11-3.3 TASK RESULT WARNING Keep head, hands, and other body parts clear of flight controls, especially those in flight controls closet.  AFCS BITE automat- ically causes actuator and controls mo- tion.  Severe injury can occur. 36.    Set NO.  1 ENGINE CONDITION lever (35) to FLIGHT. 37.    Press and release NO.  2 AFCS computer BITE Computer digital test counter (44) shall remain switch (43). blank.  BITE switch (43) shall not flash.  If counter does not remain blank or BITE switch flashes, go to task 11-3.25. 38.    Set NO.  1 ENGINE CONDITION lever (35) to STOP.  Set NO.  2 ENGINE CONDITION lever (36) to FLIGHT.  Repeat step 37 then go to step 39. 39.    Set NO.  2 ENGINE CONDITION lever (36) to STOP. 40.    Press and release BITE switch (43).   Computer counter (44) shall step and display from 1 through 3 and stop at 3.  BITE switch (41) shall light and flash while display is stopping and then glow steadily after display indicates 3.  If display is blank and BITE switch does not light, go to task 11-3.34.  If counter steps to and stops at 3 but BITE switch does not light, replace NO.  2 AFCS computer.  If BITE switch lights but display stops at 1 or 2, repeat operational check task 11-3.2.  If same result occurs, replace NO.  2 AFCS computer. 41.    Press and release BITE switch (43).   Computer counter (44) shall step and display from 4 through 95 (end of test) and go blank.  BITE switch shall flash while display is stepping.  If BITE switch lights steadily, and counter stops at an intermediate number, record that number.  Push BITE switch to continue test.  Go to table 11-3.1 to determine main- tenance action.  At end of test, counter shall go blank and BITE switch light shall go out.  If BITE switch lamp flashes at step 95, the PUSH TO TEST switch on the Pilots or Copilots radar altimeter indi- cator must be actuated within 20 seconds in order to avoid a false failure indication. GO TO NEXT PAGE 11-56  Change 12







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