Arrow PA-28R-201 Pilot's Operating Handbook And Faa Approved Airplane Flight Manual page 221

PIPER AIRCRAFT CORPORATION
PA-18R-10l, ARROW
SECTION 4 - NORMAL PROCEDURES
(a) Preflight Check.
SECTION 9
SUPPLEMENT 3
(1) Turn battery master (BAIT MASTR) switch ON and verify
that the V AC OFF light is illuminated.
NOTE
Due to the electrical power requirement of the
auxiliary vacuum pump it is suggested that the
engine be operating while making the following
checks.
(2) Turn the auxiliary vacuum pump ON and verify that the
AUX ON light is illuminated and an electrical load increase of
approximately 15 amps on the ammeter.
(3) Turn off the auxiliary vacuum pump and verify that the A UX
ON light has extinguished.
(b) Inflight Check.
(1) Turn off non-essential electrical equipment.
(2) Turn the auxiliary vacuum pump ON and verify that the AUX
ON light is illuminated and an electrical load increase of
approximately 15 amps on ammeter.
(3) Turn off auxiliary vacuum pump and verify that the AUX
ON light has extinguished and resume normal flight using
engine driven pump.
NOTE
For maximum service life, avoid continuous
non-emergency operation of the auxiliary
vacuum pump.
ISSUED: SEPTEMBER 15, 1988
REPORT: VB-1365
3
of
6 9-13