TM 1-1510-225-CL
P-8
VACUUM AND PNEUMATIC SYSTEM
1. LEFT BLEED AIR VALVE – OFF.
a. Pneumatic and suction pressures remain
normal.
b. L BL AIR OFF annunciator illuminates.
c. Both BL AIR FAIL annunciators remain
extinguished.
2. RIGHT BLEED AIR VALVE – OFF.
a. Pneumatic and suction pressures read zero.
b. Both BL AIR OFF and BL AIR FAIL
annunciators illuminated.
3. LEFT BLEED AIR VALVE – ON.
a. Pneumatic and suction pressures return to
normal.
b. Both BL AIR FAIL annunciators extinguished.
c. L BL AIR OFF annunciator extinguished.
4. RIGHT BLEED AIR VALVE – ON.
a. R BL AIR OFF annunciator extinguished.
AUTOMATIC FLIGHT CONTROL SYSTEM
1. Autopilot
controller
TRIM
UP,
TRIM
DN
annunciators – Check not illuminated. A steady
illumination of TRIM UP or TRIM DN annunciator
indicates that automatic synchronization is not
functioning and autopilot should not be engaged.
2. Turn knob – In center detent position.
3. Elevator trim control switch – ON.
4. Control wheel – To mid travel.
