Piper WARRIOR III PA-28-161 Pilot Operating Handbook page 183

PIPER AIRCRAFT CORPORATION
PA-28-161 WARRIOR III
SECTION 4 - NORMAL PROCEDURES
A. Preflight Check.
1. Set battery switch on and verify that VAC OFF lamp lights.
Due to electrical power requirement of the
auxiliary vacuum pump it is suggested that the
engine be operating while making the following
checks.
2. Turn on auxiliary vacuum pump on and verify AUX ON
light is illuminated and electrical load is approximately
15 amps on ammeter.
3. Turn off auxiliary vacuum pump and verify AUX ON light
goes out.
B. Inflight Check - Prior to entering instrument flight conditions.
1. Turn off non-essential electrical equipment.
2. Turn on auxiliary vacuum pump and verify AUX ON light
illum i n a t e d a n d e l e c t r i c a l l o a d i s a p p r o x i m a t e l y 1 1
a m p s o n a m m e t e r.
3. Turn off auxiliary vacuum pump and verify AUX ON light goes
out.
For maximum service life, avoid continuous non-
emergency operation of the auxiliary vacuum
pump.
SECTION 5 - PERFORMANCE
No change.
SECTION 6 - WEIGHT & BALANCE
Factory installed optional equipment is included in the licensed weight
and balance data in section 6 of the Pilot's Operating Handbook.
ISSUED: JULY 1, 1994
NOTE
NOTE
SECTION 9
SUPPLEMENT 1
REPORT: VB-1565
9-5