Piper ARCHER II Pilot Operating Handbook page 121

PIPER AIRCRAFT CORPORATION SECTION 6
PA-28-181, ARCHER II WEIGHT AND BALANCE
CAUTION
Whenever the fuel system is completely drained
and fuel is replenished it will be necessary to
run the engine for a minimum of 3 minutes at
1000 RPM on each tank to ensure no air exists
in the fuel supply lines.
(4) Fill with oil to full capacity.
(5) Place pilot and copilot seats in fourth (4th) notch, aft of
forward position. Put flaps in the fully retracted position
and all control surfaces in the neutral position. Tow bar
should be in the proper location and all entrance and
baggage doors closed.
(6) Weigh the airplane inside a closed building to prevent
errors in scale readings due to wind.
(b) Leveling
(1) With airplane on scales, block main gear oleo pistons in
the fully extended position.
tire, to center bubble on level. .
(c) Weighing - Airplane Basic Empty Weight
(1) With the airplane level and brakes released, record the
weight shown on each scale. Deduct the tare, if any, from
each reading.
ISSUED: JULY 2, 1979 REPORT: VB-1120
6-3