(4)
 Set the aircraft to South (MHS):

 -calculate and write the magnetic deviation DS between the MHS and the CH DS = MHS - CH
 DS the Adjustment Value (AV) is equal to --2
 -correct the CH with the AV to get the CCH
 -put the non magnetic screwdriver into the NS hole of the standby compass
 -use the non magnetic screwdriver to set the standby compass to CCH. Example: . if MHS = 180. and CH = 174. DS = 180. - 174. = +6.
 DS 6
 AV = -- = + - = +3
 2 2
 Correct the Compass Heading indication of the standby compass (CH)
 with the Adjustment Value (AV) to get the CCH
 174. + 3. = 177.
 . if MHS = 180. and CH = 182.
 DS = 180. - 182. = -2.
 DS 2
 AV = -- = - - = -1
 2 2 Correct the Compass Heading indication of the standby compass (CH) with the Adjustment Value (AV) to get the CCH 182 + (-1) = 181
R 1EFF : 001-049, 051-061, 101-105, 201-203, 1 34-22-00Page 508 1 1 May 01/05 1 1 1CES 1 (5) Set the aircraft to West (MHW)

 -calculate and write the magnetic deviation DW between the MHW and the CH DW = MHW - CH
 DW the Adjustment Valve (AV) is equal to --2
 -correct the CH with the AV to get the CCH
 -put the non magnetic screwdriver into the EW hole of the standby compass
 -use the non magnetic screwdriver to set the standby compass to CCH. (Ref. Para. (4)).

R **ON A/C 062-099, 106-149, 151-199, 204-299, 301-399, 401-499,
 Subtask 34-22-00-730-050-A
 A. Compensation Adjustment/Test of the Standby Compass
 NOTE : The reference magnetic heading referred to in this procedure is
____
 the true heading indication read on the ADIRS CDU. R Magnetic heading = true heading + magnetic variation (a natural R phenomenom which varies continuously).
 (1)
 On the standby compass:

 -put the COMPENSATION KEY (CE2-40) into the B hole above the display window
 -use the non magnetic Compensation Key to set the B compensation system to zero
 -put the non magnetic Compensation Key into the C hole above the display window
 -use the non magnetic Compensation Key to set the C compensation system to zero.

 (2)
 Use the system in operation to set the aircraft to north (MHN) (Magnetic Heading North):

 -calculate and write the magnetic deviation DN between the MHN and the CH (Compass Heading Indication of the Standby Compass): DN = MHN - CH
 -the Adjustment Value (AV) is equal to DN
 -correct the CH with the AV to get the compensated compass heading indication (CCH)
 -put the non magnetic Compensation Key into the C hole of the standby compass
 -use the non magnetic Compensation Key to set the standby compass to CCH.
 1EFF : ALL 1 34-22-00Page 509 1 1 Aug 01/05 1 1 1CES 1 Example: . if MHN = 360. and CH = 356. DN = 360. - 356. = +4. AV (adjustment value) = +4 Correct the Compass Heading indication of the standby compass (CH) with the AV to get the CCH 356. + 4 = 360. . if MHN = 0. and CH = 002. DN = 0. - 2. = -2. AV (Adjustment Value) = -2. Correct the Compass Heading indication of the standby compass (CH) with the AV to get the CCH 2. +(-2.) = 0

 (3)
 Set the aircraft to East (MHE):

 -calculate and write the magnetic deviation DE between the MHE and the CH DE = MHE - CH
 -the Adjustment Value (AV) is equal to DE
 -correct the CH with the AV to get the CCH
 -put the non magnetic Compensation Key into the B hole of the standby compass
 -use the non magnetic Compensation Key to set the standby compass to CCH (Ref. Para. (2)).

 (4)
 Set the aircraft to South (MHS):

 -calculate and write the magnetic deviation DS between the MHS and the CH DS = MHS - CH
 DS the Adjustment Value (AV) is equal to --2
 -correct the CH with the AV to get the CCH
 -put the non magnetic Compensation Key into the C hole of the standby compass
 -use the non magnetic Compensation Key to set the standby compass to CCH. Example: . if MHS = 180. and CH = 174. DS = 180. - 174. = +6.
 DS 6 AV = -- = + - = +3
 2 2 Correct the Compass Heading indication of the standby compass (CH) with the Adjustment Value (AV) to get the CCH 174. + 3. = 177. . if MHS = 180. and CH = 182.
R 1EFF : 062-099, 106-149, 151-199, 204-299, 1 34-22-00Page 510 1301-399, 401-499, 1Aug 01/05 1 1 1CES 1

 DS = 180. - 182. = -2.
 DS 2
 AV = -- = - - = -1

 2 2 Correct the Compass Heading indication of the standby compass (CH) with the Adjustment Value (AV) to get the CCH 182 + (-1) = 181
　
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