Piper Arrow PA-28R-201 Pilot Operating Handbook page 400

ARROW
PA-28R-201,
SECTION 3- EMERGENCY
Loss of Heading
Accuracy
Indication:
•
Difficultymaintaining course while using VOR
• Excessive difference between
VOR
or GPS course.
• ATC
indicatesthe aircraft is on a wrong heading.
• Excessive deviation between PFD
after compass deviation applied.)
(>100
If heading systems differ by more than 10° (after compass deviation applied):
• Use
magnetic compass
current
High
compass
flight conditions, the pilot must reduce these loads as much
as possible to insure accuracy. Tests have shown
conditioner and pitot heat contribute to significantheading
errors of the magnetic compass. These
turned OFF
PDF
heading.
12, 1995
ISSUED:
JULY
REVISED: MAY 22, 2006
HB-PQY, Page: 9-143-(0)
PROCEDURES
heading and track required maintaining a
heading and magnetic compass.
for primary heading reference.
CAUTION
in the vicinity of the magnetic
loads
can influence its accuracy. Depending
prior to comparing the magnetic compass
Revision: 18, MAY 22, 2006
SECTION
SUPPLEMENT
(continued)
or GPS.
on the
that air
items should be
to the
REPORT: VB-1612
21 of 36,
9
18
9-143
9-143