Warm-Up; Taxiing; Ground Check - Piper Cherokee Archer II Pilot Operating Handbook

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PIPER AIRCRAFT CORPORATION
PA-28-181, CHEROKEE ARCHER II
4.15 WARM-UP
SECTION 4
NORMAL PROCEDURES
Wann-up the engine at 800 to 1200 RPM for not more than two minutes in wann weather and four
minutes in cold. Avoid prolonged idling at low RPM, as this practice may result in fouled spark plugs.
Takeoff may be made as soon as the ground check
ts
completed, provided that the throttle may be
opened fully without backfiring or skipping, and without a reduction in engine oil pressure.
Do not operate the engine at high RPM when running up or taxiing over ground containing loose
stones, gravel or any loose rna terial that may cause damage to the propeller blades.
4.17 TAXIING
Before attempting to taxi the airplane, ground personnel should be instructed and approved by a
qualified person authorized by the owner. Ascertain that the propeller back blast and taxi areas are clear.
Power should be applied slowly to start the taxi roll. Taxi a few feet forward and apply the brakes to
determine their effectiveness. While taxiing, make slight turns to ascertain the effectiveness of the steering.
Observe wing clearances when taxiing near buildings or other stationary objects. If possible, station an
observer outside the airplane.
Avoid holes and ruts when taxiing over uneven ground.
Do not operate the engine at high RPM when running up or taxiing over ground containing loose
stones, gravel or any loose material that may cause damage to the propeller blades.
4.19 GROUND CHECK
The magnetos should be checked at 2000 RPM. Drop off on either magneto should not exceed 175
RPM and the difference between the magnetos should not exceed 50 RPM. Operation on one magneto
should not exceed 10 seconds.
Check the vacuum, gauge; the indicator should read 5.0" ±.I" Hg at 2000 RPM.
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Check the annunciator panel lights with the press-to-test button. Also check the air conditioner.
Carburetor heat should also be checked prior to takeoff to be sure the control is operating properly
and to clear any ice which may have formed during taxiing. Avoid prolonged ground operation with
carburetor heat "ON" as the air is unftltered. .
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The electric fuel pump should be turned "OFF" after starting or during warm-up to make sure that
the engine driven pump is operating. Prior to takeoff the electric pump should be turned ON again to
prevent loss of power during takeoff should the engine driven pump fail. Check both oil temperature and
oil pressure. The temperature may be low for some time if the engine is being run for the first time of the
day. The engine is warm enough for takeoff when the throttle can be opened without the engine faltering.
ISSUED: JUNE 18, 1976
REPORT: VB-790
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