Arrow PA-28R-201 Pilot's Operating Handbook And Faa Approved Airplane Flight Manual page 220

SECTION 9
SUPPLEMENT 3
SECTION 1 - GENERAL
PIPER AIRCRAFT CORPORATION
PA-28R-201, ARROW
This supplement supplies information necessary for the operation of the (
airplane when the optional Piper Auxiliary Vacuum System is installed. The
information contained within this supplement is to be used in conjunction
with the complete handbook.
SECTION 2 - LIMIT A TIONS
(a) The auxiliary vacuum system is limited to standby function
only, do not take off with the engine driven dry air pump
inoperative.
(b) Discontinue flight in Instrument Meteorological Conditions (IMC)
if vacuum pressure falls below 4.8 In. Hg. .
(c) The auxiliary pump/motor assembly and elapsed time
indicator must be removed from service after 500 hours
accumulated operating time or
to
years whichever occurs first.
SECTION 3 - EMERGENCY PROCEDURES
(a) VAC OFF or Low V AC Warning illuminated - Auxiliary Vacuum
Switch AUX ON.
(b) Verify vacuum system suction is 4.8 to 5.2 In. Hg., VAC OFF
annunciator is extinguished, and A UX ON annunciator
illuminated.
CAUTION
Compass error may exceed 10° when auxiliary
vacuum system is in operation.
(c) Monitor electrical load - verify alternator capacity is not
being exceeded as indicated by the ammeter. If required, turn
off nonessential electrical equipment.
(d) Land at the earliest opportunity to have primary system repaired.
REPORT: VB-1365 ISSUED: SEPTEMBER 15, 1988
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