TM 55-4920-231-14
(2) Case leak (CL) provides for case leak
test and/or calibration of airspeed indicator (6,
The case leak valve levers (3, 4, 5, 7, and 8,
figure 7) on tester.
c. Case leak valve lever (5, figure 8) has three
ing aircraft instruments and checking the master
positions:
instruments on tester for case leaks and/or cali-
(1) Normal (NOR) provides for static test
bration.
of airspeed indicator from aircraft.
(2) Case leak (CL) provides for case leak
a. Case leak valve lever (3, figure 8) has
test and/or calibration of airspeed indicator (6,
three positions:
figure 7) on tester.
(1) Normal (NOR) provides for static tests
(3) Vent (V) provides for venting vacuum
of altimeter and rate-of -climb indicator from air-
from tester.
craft.
(2) Altimeter (ALT) provides for case leak
positions:
test and/or calibration of altimeter (3, figure 7)
(1) Normal (NOR) provides for static test
on tester.
of manifold pressure gage from aircraft.
(3) Rate-of-climb (ROC) provides for case
(2) Case leak (CL) provides for case leak
leak test and/or calibration of rate-of-climb indi-
test and/or calibration of manifold pressure gage
cator (2) on tester.
(7, figure 7) on tester.
e. Case leak valve lever (8, figure 8) has two
positions:
positions:
(1) Normal (NOR) provides for static test
(1) Normal (NOR) provides for static test
of fuel pressure gage from aircraft.
of airspeed indicator from aircraft.
