PIPER AIRCRAFT, INC.
PA-28-161, WARRIOR III
MAINTENANCE MANUAL
PAGE 1
Nov 30/06
3I17
37-00-00
GENERAL
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.)
1. Description and Operation
NOTE: In S/N’s 2842218 and up, for airplanes equipped with the optional Avidyne Entegra EFIS: no
vacuum system is installed.
The air driven gyro instrumentation in Warrior III airplanes gives quick and actual indication of airplane
attitude, performance, and condition. Maintenance, other than described, must be done by the
instrument manufacturer or an authorized repair station.
The vacuum system operates the gyro instruments and consists of an engine-driven dry vacuum pump,
a vacuum regulator and filter, and necessary tubing to connect components. The optional auxiliary
vacuum system operates on 28 Vdc. A vacuum gauge is used to constantly monitor the system. Any time
vacuum pressure falls below 3.5 in. Hg, a vacuum sensor switch attached to the vacuum regulator will
cause the VACUUM INOP annunciator to illuminate.
2. T
roubleshooting
See Chart 1.
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