AIRPLANE
OPERATIONS
MANUAL
ABNORMAL
PROCEDURES
REVISION 37
1-03-59
Page
11
Code
03
AOM-145/1114
IRS ON BATTERY
EICAS ADVISORY: IRS 1 (2) ON BATT
Associated IRU will operate for 40 minutes.
IRS OVERHEAT
EICAS CAUTION: IRS 1 (2) OVERHEAT
Operate affected IRU until completion of the flight.
If MSU FAULT annunciator is lighted, IRS 1 (2) FAIL message is
presented or inertial data ceases to be transmitted by IRU:
Associated IRS Reversionary Button ...................... PRESS
Affected IRU Mode Select Switch............................ OFF
NOTE: The Autopilot is not available.
If IRU is OFF, the airplane is near the end of the flight and
additional attitude reference is necessary:
IRU Mode Select Switch..................................... ATT
CAUTION:
FOR IRS IN ATTITUDE MODE, NAVIGATION AND
ATTITUDE OUTPUTS ARE NOT AS ACCURATE
AS IN THE NAV MODE. MAGNETIC HEADING
MUST BE ENTERED AND UPDATED
PERIODICALLY FROM THE BEST AVAILABLE
ALTERNATIVE SOURCE, THROUGH THE FMS
CDU.
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