TM 1-1510-225-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
ENGINE RUNUP (CONT)
(c) Cabin pressurization RATE con-
trol - Set to maximum.
(d) BLEED AIR VALVES switches
(2) - INSTR & ENVIR OFF.
(e) PNEUMATIC PRESSURE gage/
GYRO SUCTION gage - Check.
Pressure should drop to zero.
(f) BL AIR OFF annunciators (2) -
Check illuminated
(g) BL AIR FAIL annunciators (2) -
Check illuminated.
(h) CABIN PRESS switch - TEST
(hold).
(i) LEFT BLEED AIR VALVES
switch - OPEN.
(j) L BL AIR OFF annunciator -
Check extinguished.
(k) BL AIR FAIL annunciators (2) -
Check extinguished
(1) PNEUMATIC PRESSURE gage/
GYRO SUCTION gage - Check
in green arc.
(m) CABIN CLIMB indicator -
Check for descent indication
within 10 to 15 seconds, then
release test switch.
(n) LEFT BLEED AND VALVES
switch - INSTR & ENVIR OFF.
(o) Repeat steps (e) through (m)
using the right bleed air valve.
(p) CABIN PRESS switch - Set to
PRESS position (center).
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