Piper PA-28-161, Maintenance Manual

Page: 570 / 1104

PIPER AIRCRAFT, INC.
PA-28-161, WARRIOR III
MAINTENANCE MANUAL
PAGE 2
Nov 30/06
3H2
34-20-00
2. Standby Attitude Indicator
NOTE: For airplanes equipped with the Avidyne Entegra EFIS, the primary attitude indicator is the
Primary Flight Display (PFD).
WARNING: FAILURE TO CONSULT APPLICABLE VENDOR PUBLICATION(S), WHEN SERVICING
OR INSPECTING VENDOR EQUIPMENT INSTALLED IN PIPER AIRCRAFT, MAY
RENDER THE AIRCRAFT UNAIRWORTHY. (SEE INTRODUCTION - SUPPLEMENTARY
PUBLICATIONS.)
In S/N’s 2842218 and up, with the optional Avidyne Entegra Electronic Flight Instrument System
installed;
an electric standby attitude indicator is installed to the left of the Primary Flight Display (PFD).
Other than removing and replacing the unit itself (see 39-10-00), the only line replaceable part is the
emergency power battery which is located in the rear of the instrument’s case. See Figure 2.
Required periodic maintenance is listed in 5-20-00 and 5-30-00. Checkout and test procedures and
Instructions for Continued Airworthiness are provided in Mid-Continent Instruments Manual No.
9015762.
CHART 1
TROUBLESHOOTING ATTITUDE INDICATOR
Trouble Cause Remedy
Bar fails to respond. Insufficient vacuum. Check pump and tubing.
Filter dirty. Clean or replace filter.
Bar does not settle. Insufficient vacuum. Check line and pump.
Adjust valve.
Incorrect instrument. Check part number.
Defective instrument. Replace.
Bar oscillates or shimmies Instrument loose in panel. Tighten mounting screws.
continuously.
Vacuum too high. Adjust valve.
Defective mechanism. Replace instrument.
Instrument does not indicate Instrument not level in Loosen screws and level
level flight. panel. instrument.
Aircraft out of trim. Trim aircraft.
Bar high after 180° turn. Normal,
if it does not exceed 1/16 inch.
Instrument tumbles in flight. Low vacuum. Reset regulator.
Dirty filter. Clean or replace filter.
Line to filter restricted. Replace line.
Plug missing or loose in Replace or tighten plug.
instrument.