(21)
 Stop for 30 seconds.

 (22)
 Make sure that bit 23 for the ARINC word "E/26/350/00" is "0".

 S 865-196
 S 745-197
 NOTE: (E/26/350/00, BIT 23) = SRM-L UNSCHEDULED TRIM SIGNAL ->
____
 SRM-R INTERFACE FAIL

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747-400
MAINTENANCE MANUAL

 S 745-198
 (23)
 Use the PREV PAGE key on the CDU to show page 4 of the INPUT MONITORING.

 S 745-199

 (24)
 Make sure that bit 14 for the ARINC word "E/53/270/00" is "0".

 NOTE: (E/53/270/00, BIT 14) = UNSCHEDULED TRIM IND (SRM-L)
____
 S 865-200
 (25)
 Push the R CMD button on the mode control panel.

 S 745-201

 (26)
 Use the NEXT PAGE key on the CDU to show page 8 of the INPUT MONITORING.

 S 745-202

 (27)
 Use the alphanumeric keys on the CDU to put "E/26/270/00" into the scratchpad.

 S 745-203

 (28)
 Push the LSK 1L to move the data into the correct position.

 S 745-204

 (29)
 Set and hold the alternate electric trim switches on the Pilots' Control Stand in the APL NOSE DN direction and do these steps:

 (a)
Hold the alternate electric trim switches for 5 seconds.

 (b)
Make sure that bit 14 for the ARINC word "E/26/270/00" is "1".

 NOTE: (E/26/270/00, BIT 14) = UNSCHEDULED TRIM IND (SRM-R)
____
 (c)
Use the NEXT PAGE key to show page 1 of the INPUT MONITORING.

 (d)
Make sure that bit 23 for the ARINC word "E/53/350/00" is "0".

 NOTE: (E/53/350/00, BIT 23) = SRM-R UNSCHEDULED TRIM SIGNAL ->
____
 SRM-L INTERFACE FAIL

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747-400 MAINTENANCE MANUAL
 S 865-205
 (30)
 Release the alternate electric trim switches.

 S 865-206

 (31)
 Push the autopilot disconnect switch on the control wheel, two times, to disengage the autopilot and to cancel the aural/visual annunciations.

 S 865-207

 (32)
 Stop for 30 seconds.

 S 745-208

 (33)
 Make sure that bit 23 for the ARINC word "E/53/350/00" is "0".

 NOTE: (E/53/350/00, BIT 23) = SRM-R UNSCHEDULED TRIM SIGNAL ->
____
 SRM-L INTERFACE FAIL

 S 745-209
 (34)
 Use the PREV PAGE key on the CDU to show page 8 of the INPUT MONITORING.

 S 745-210

 (35)
 Make sure that bit 14 for the ARINC word "E/26/270/00" is "0".

 NOTE: (E/26/270/00, BIT 14) = UNSCHEDULED TRIM IND (SRM-R)
____
 G. Speed Trim Engage and Valid Trim Command Crossfeed Check
 S 865-098
 (1)  
Remove the hydraulic pressure from the hydraulic systems No. 1, 2, 3 and 4 (AMM 29-11-00/201).

 S 865-099

 (2)  
Set the FLT CONTROL HYD POWER TAIL 1, 2, 3, and 4 switches to the SHUTOFF position. These switches are on the Pilots' Overhead Maintenance Panel (P461).

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A 747-400 MAINTENANCE MANUAL
 (3)  S 865-100Set the FLT CONTROL HYD POWER WING 1, 2, 3, and 4 switches to the SHUTOFF position. These switches are on the Pilots' Overhead Maintenance Panel (P461).
　
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