TM 55-1520-240-23-9
11-276.1 ADJUST SIDESLIP AIRSPEED OR BAROMETRIC ALTITUDE PRESSURE TRANSDUCER,
AFCS COMPUTER (AVIM) (Continued)
11-276.1
BAROMETRIC ALTITUDE TRANSDUCER
NOTE
If test is being conducted at sea level,
perform only steps 21, 22, 24, 30, 31,
and 32.
13.
Set PRESSURE knob (16) of tester (T52) (17)
to OFF.
14.
Set VACUUM knob (18) to ALT & R.O.C.
0-50,000 FT.
15.
Set INCREASE knob (19) and DECREASE knob
(20) fully clockwise.
CAUTION
The case leak valve levers must be in
these positions, and the safety valve
closed, to isolate altitude indicator
from vacuum source; otherwise,
damage to instrument can occur.
16.
Open cover (21).
17.
Set lever (22) to NOR and lever (23) to CL. Close
cover (21).
18.
Turn knob (24) fully clockwise.
19.
Remove cap (25) from fitting (26).
CAUTION
Hose assembly must be connected to
both pitot and static ports; otherwise,
damage to altitude differential
pressure transducer can occur.
20.
Connect hose (27) (APP E-37) to fitting (26), port
S (28), and port P (29).
11-1068
