(f)
Make sure the BIT (DISCRETE) 2 shows a 0.
I. ADC Data Bus Test
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(1)
Do the ADC data bus test that follows:
(a)
Make sure the air data computing system is operational (AMM 34-12-00/501).
(b)
Set the Captain's ADC Source Select switch to the NORM position.
(c)
Push and hold the left air data computer switch on the P61 test panel for more than 7 seconds.
(d)
Set the SUBFRAME and WORD for each signal as shown in the ADC DATA BUS table. ~....................................................... | ADC DATA BUS SIGNAL TEST | ......................................................... | | TESTER SETUP | | | SIGNAL ........................... TESTER | | | SUBFRAME | WORD | DISPLAY | ......................................................... | ALTITUDE | 0 | 23 | 0471 | | | | | | | AIRSPEED | 0 | 22 | 1044 | 2..............…............…............…..............1
(e)
Set the captain's ADC source select switch to the ALTN position.
(f)
Push and hold the right air data computer switch on the P61 test panel for more than 7 seconds.
(g)
Set the SUBFRAME and WORD for each signal as shown in the ADC DATA BUS table.
(2)
Set the Capt's ADC select switch to the NORM position.
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757 MAINTENANCE MANUAL
J. Captain's FMC Switch Position Test
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(1) Do the FMC switch test that follows:
(a)
Make sure the flight management computer system is operational (AMM 34-61-00/501).
(b)
On the tester, set the SUBFRAME to 2 and the WORD to 32.
(c)
Set the Captain's FMC source select switch to the NORM position.
(d)
Make sure the BIT (DISCRETE) 1 shows a 1.
(e)
Set the captain's FMC source select switch to the ALTN position.
(f)
Make sure the BIT (DISCRETE) 1 shows a 0.
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(2) Set the captain's FMC select switch to the NORM position.
K. Captain's IRS Switch Position Test
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(1) Do the IRS switch test that follows:
(a)
Make sure the inertial reference system is operational (AMM 34-21-00/501).
(b)
On the tester, set the SUBFRAME to 3 and the WORD to 32.
(c)
Set the Captain's IRS source select switch to the NORM position.
(d)
Make sure the BIT (DISCRETE) 2 shows a 1.
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本文链接地址：757 AMM 飞机维护手册 仪表 CHAPTER 31 - INSTRUMENTS 1(64)
