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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
S 822-108
(6)
Turn the top and bottom SCC dials to show an indication of W at the index line.
S 972-107
(7)
Make a record of the heading shown on the standby magnetic compass.
S 822-106
(8)
Turn the E-W adjustment screw on the standby magnetic compass until the error in the last two recorded values is at a minimum.
NOTE: Divide the error in each of the two directions as equally as
____
possible.
S 822-105
(9)
Turn the top and bottom SCC dials to show an indication of N at the index line.
S 972-104
(10)
Make a record of the heading shown on the standby magnetic compass.
S 822-103
(11)
Turn the top and bottom SCC dials to show an indication of S at the index line.
S 972-102
(12)
Make a record of the heading shown on the standby magnetic compass.
S 822-094
(13)
Turn the N-S adjustment screw on the standby magnetic compass until the error in the last two recorded values is at a minimum.
NOTE: Divide the error in each of the two directions as equally as
____
possible.
S 822-101
(14) Continue to adjust the SCC dials for each pair of directions (E-W, N-S). Then turn the E-W and N-S adjustment screws until the errors are at a minimum.
NOTE: Continue to do this procedure until the error in each pair of
____ directions is at a minimum. Start with E-W and turn the E-W adjustment screw. Then do N-S and turn the N-S adjustment screw.
When the errors are at a minimum, do the steps that follow for the 12-point accuracy swing:
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34-24-00
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ú ú ú 01.101 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. Page 213Jul 12/02
A
737-300/400/500MAINTENANCE MANUAL
S 822-100
(15)
Adjust the SCC dials to indicate these magnetic headings: 0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, and 330 degrees.
S 972-095
(16)
Make a record of the magnetic heading (MH) and standby compass heading (CH).
S 972-099
(17)
Calculate and make a record of the difference for each 30-degree heading in the steer column on the compass correction card as follows:
D = MH - CH
NOTE: During these steps, make sure that each difference
____ is less than | 8 degrees. For CAA certification, each difference must be less than | 5 degrees.
S 972-096
(18) Make sure the difference between the maximum positive and maximum negative value is 10 degrees or less.
G. Put the airplane back to its usual condition.
S 862-098
(1)
Set the mode selector switch for each IRS to OFF.
S 862-097
(2)
Remove the electrical power if it is not necessary
(AMM 24-22-00/201).
TASK 34-24-00-352-019
4. Remove the Magnetic Field From the Strut Assembly of the Nose Landing Gear
__________________________________________________________________________
NOTE: Do this procedure only when lightning strikes the nose landing gear
____ and causes a magnetic field. The magnetic field must be sufficiently strong to cause an error when you read the standby magnetic compass.
A. Standard Tools and Equipment
(1)
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