2
nd
Edition - Rev 0
SUPPLEMENT SG-1
CHAPTER 34 – MAINTENANCE PRACTICES
Page 104
Step
no.
Standby attitude indicator
replacement and testing
Task description
Additional info &
References
stabilizes, and then allowing
the knob to return to the nor-
mal position.
B. For trim adjustment, use a 5/64” hex drive
wrench to loosen the lock screw. Slide the screw
up or down in the slot to the desired pitch attitude
presentation (aligning the symbolic airplane with
the horizon) and retighten the screw.
C. If caging is required, caging should be accom-
plished when the aircraft is in a wings level, nor-
mal cruise attitude, as indicated by AHRS. If the
gyro is caged when the aircraft is not in this atti-
tude, the resulting attitude presentation immedi-
ately after caging will be in error by the difference
between true vertical and actual aircraft attitude.
Small errors in caging erection will be corrected
by the indicator to true vertical in pitch and roll at
2.5° per minute minimum (5°/min. nominal).
Remove power to the indicator.
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