(d)
Push the LSK that is adjacent to <GROUND TESTS to show the GROUND TESTS menu.
(e)
Push the NEXT PAGE key until you find <34 NAVIGATION RADIOS.
(f)
Push the LSK that is adjacent to the <34 NAVIGATION RADIOS to show the GROUND TESTS menu for the navigation radios system.
(g)
Push the NEXT PAGE key until you find <RA-L,<RA-R or <RA-C
NOTE: If INHIBITED shows above <RA-L, <RA-R or <RA-C,
____
the test will not operate.
(h)
If INHIBITED shows above <RA-L, <RA-R or <RA-C: 1) Push the LSK that is adjacent to the test prompt. 2) Do the steps shown on the CDU. 3) Push the LSK that is adjacent to <RETURN to show the ground
test menu again.
(i)
Make sure that the radio altitude display on the PFDs is -6 |2 feet.
E. Radio Altimeter System Ground Test
S 745-317
(1) Push the LSK that is adjacent to the applicable prompt (<RA-L, <RA-R, or <RA-C).
(a) When the TEST PRECONDITIONS page shows, make sure each instruction on the page is completed.
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(b) Push the LSK that is adjacent to START TEST>.
NOTE: IN PROGRESS shows during the test.
____
(c) Make sure the radio altitude display on the PFDs is 40 feet.
S 745-323
(2) When IN PROGRESS goes out of view, look for PASS or FAIL> adjacent to the applicable prompt (<RA-L, <RA-R, or <RA-C).
NOTE: If a PASS indication shows, no failures occurred
____
during the test.
(a)
Make sure the radio altitude display on the PFDs is -6 |2 feet.
(b)
If FAIL> shows: 1) Push the LSK that is adjacent to FAIL> to see the GROUND TEST MSG pages for the failure. 2) Push the NEXT PAGE key until you find all the GROUND TEST MSG pages. 3) Make a list of all CMCS messgaes, CMCS message numbers, and ATA numbers that show on the GROUND TEST MSG pages.
4) Go to the CMCS Message Index of the Fault Isolation Manual (FIM) to find the corrective action for each CMCS message.
F. Put the Airplane in its Usual Condition
S 865-318
(1) Remove the electrical power if it is not necessary
(AMM 24-22-00/201).
TASK 34-33-00-735-212
3. System Test - Radio Altimeter System
____________________________________
A. General
(1) This task contains these two procedures:
(a)
Radio Altimeter System Air/ground Relay Interface Test
(b)
Radio Altimeter System EIU and CMC Interface Test
B. References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 31-61-00/501, Integrated Display System
(3)
AMM 45-10-00/501, Central Maintenance Computer System
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C. Access
(1) Location Zones
221 Control Cabin, Left
222 Control Cabin, Right
D. Procedure
S 865-213
(1)
Supply electrical power (AMM 24-22-00/201).
S 715-214
(2)
Make sure the IDS is serviceable (AMM 31-61-00/501).
S 715-215
(3)
Make sure the CMCS is serviceable (AMM 45-10-00/501).
S 865-216
(4)
Make sure these circuit breakers are closed:
(a) P7 Overhead Circuit Breaker Panel
1) 7B3 RADIO ALTM L
2) 7B4 RADIO ALTM C
3) 7C21 RADIO ALTM R
E. Radio Altimeter System Air/Ground Relay Interface Test
S 865-218
(1) Prepare the CDU to do the test:
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