SECTION 9
SUPPLEMENT 20 PA-28-181, ARCHER III
REPORT: VB-1611 ISSUED: JULY 12, 1995
9-118, 10 of 30 REVISED: JANUARY 9, 2006
SECTION 3 - EMERGENCY PROCEDURES (continued)
Invalid Attitude and Heading Data
Indication: Attitude and Heading Data removed and replaced with Red X’s.
Standby Attitude Gyro ..............................................................VERIFY ON and
flag is pulled on gyro.
Maintain attitude control using standby gyro.
If time and conditions permit:
PFD Circuit Breaker................................................................PULL and RESET
If attitude and heading data is still invalid:
Maintain attitude control by using standby gyro.
Maintain heading control by utilizing magnetic compass and other directional
indications (such as MFD, MAP/NAV page).
CAUTION
High current loads in the vicinity of the magnetic compass
can influence its accuracy. Depending on the flight conditions,
the pilot must reduce these loads as much as possible to
insure accuracy. Tests have shown that air conditioner and
pitot heat contribute to significant heading errors of the
magnetic compass. These items should be turned OFF prior
to comparing magnetic compass headings.
Land as soon as practical.
SECTION 9
SUPPLEMENT 20 PA-28-181, ARCHER III
REPORT: VB-1611 ISSUED: JULY 12, 1995
9-118, 10 of 30 REVISED: JANUARY 9, 2006
SECTION 3 - EMERGENCY PROCEDURES (continued)
Invalid Attitude and Heading Data
Indication: Attitude and Heading Data removed and replaced with Red X’s.
Standby Attitude Gyro ..............................................................VERIFY ON and
flag is pulled on gyro.
Maintain attitude control using standby gyro.
If time and conditions permit:
PFD Circuit Breaker................................................................PULL and RESET
If attitude and heading data is still invalid:
Maintain attitude control by using standby gyro.
Maintain heading control by utilizing magnetic compass and other directional
indications (such as MFD, MAP/NAV page).
CAUTION
High current loads in the vicinity of the magnetic compass
can influence its accuracy. Depending on the flight conditions,
the pilot must reduce these loads as much as possible to
insure accuracy. Tests have shown that air conditioner and
pitot heat contribute to significant heading errors of the
magnetic compass. These items should be turned OFF prior
to comparing magnetic compass headings.
Land as soon as practical.
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