TM 1-1520-238-T-7
11434
Change 5
11132. STAB POS NOT 19 2 NU FOR 70 KNOTS AND COLLECTIVE CENTERED (cont)
11132
8. Check for open between P984E and ground.
Does open exist?
YES
Repair open wire.
Go to paragraph 1188.
NO
Go to step 9.
9. Check for open between:
P984D and P990D,
P984C and P990E.
Does open exist?
YES
Repair open wire between:
P984D and P498A15,
(A323)J1A15 and
(A323)TB15G,
(A323)TB15H and
(A323)J2B13,
P494B13 and P990D,
P984c and P498A16,
(A323)J1A16 and
(A323)TB15J,
(A323)TB15K and
(A323)J3B14,
P494B14 and P990E.
Go to paragraph 1188.
NO
Replace AIRSPEED
TRANSDUCER 2 (MT18)
(TM 1-1520-238-23).
10. Detach P983 from (MT17)J1.
Close STAB AUTO AC (A76)CB2 circuit
breaker. Check for +15 2 VDC between
P983A and ground.
Is voltage present?
YES
Go to step 12.
NO
Go to step 11.
11. Detach 987 from (A637)J3.
Check for open between:
P987U and P983A.
Does open exist?
YES
Repair open wire.
Go to paragraph 1188.
NO
Replace STAB CONT UNIT 1
(A637) (TM 1-1520-238-23).
12. Check for short between P983D and ground.
Does short exist?
YES
Go to step 13.
NO
Go to step 15.
13. Detach P986 from (A637)J986.
Check for short between P983D and ground.
Does short exist?
YES
Go to step 14.
NO
Replace STAB CONT UNIT 2
(A638) (TM 1-1520-238-23).
14. Detach P682 from (A69)J3.
Check for short between P983D and ground.
Does short exist?
YES
Repair shorted wire between:
P983D and P491A5,
(A323)J6A5 and
(A323)TB31G,
A323)TB31F and
(A323)J3B3,
P497B3 and P682116,
(A323)TB31H and
(A323)J3A19,
P497A19 and P986D.
Go to paragraph 1188.
NO
Replace DASEC (A69)
(TM 1-1520-238-23).