(c)  
Set the SET switch to the RUN position.

 (d)  
Make a note of the time on the GMT display.

 (e)  
Start the stopwatch.

 (f)  
After at least 3 minutes, use the stopwatch as a reference to make sure the clock time is correct. 1) You can continue the procedure while you do the stopwatch

 check.
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MAINTENANCE MANUAL

 S 715-000
 (12) Do a check of chronograph time and elapsed time (ET) for the captain's and first officer's clocks:
 (a) On the bottom left hand corner of the clock, set the ET control
 switch to the RESET position.
 (b)  Let the ET switch go back to the HLD position.
 (c)  Set the ET switch to the RUN position.
 (d)  Push the CLOCK switch on the glareshield, P7.
 NOTE:____ The captain's CLOCK switch is on the left side.  The
 first officer's CLOCK switch is on the right side.
 (e)  Make sure the ET/CHR display shows one zero.
 (f)  Make sure the sweep second hand on the clock starts to turn
 from the 12 o'clock position.
 (g)  After the sweep second hand completes two full revolutions,
 continue the procedure.
 (h)  Push the CHR switch on the clock.
 1)  Make sure the sweep second hand stops.
 2)  Make sure the ET/CHR display holds the correct minute
 value.
 (i)  Push the CLOCK switch on the glareshield.
 1)  Make sure the sweep second hand goes back to the 12 o'clock
 position.
 (j)  Make sure the ET/CHR display shows more than zero minutes
 (elapsed time).

 S 715-002
 (13) ON GUN 105-999; Do the date test on the captain's clock and the first officer's clock:
 (a) Push the DATE switch on the clock.
 1)  Make sure the DAY MO/YR display flashes while it shows the day and month, and then the year.
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757 MAINTENANCE MANUAL
 (b)  
Set the SET switch to the HSD position. 1) Make sure the DAY digits in the DAY MO/YR display change in

 sequence (1 to 31). 2) Make sure the two MO numbers do not change.

 (c)  
Set the SET switch to the MSM position. 1) Make sure the MO digits in the DAY MO/YEAR display change

 in sequence (1 to 12). 2) Make sure the two DAY numbers do not change.

 (d)  
Set the SET switch to the HLDY position.

 1)  Make sure the YEAR digits in the DAY MO/YEAR display change in sequence.
　
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本文鏈接地址：757 AMM 飛機維護手冊 儀表 CHAPTER 31 - INSTRUMENTS 1(33)