Service difficulty report · Fmc · Airbus A320232

Difficulty date
May 5, 2025
Submitted
May 7, 2025
Operation
Air carrier
Aircraft
N495UA
Make and model
Airbus A320232
Aircraft serial
1842
Aircraft time
65,216 hours, 28,716 cycles
Part
Fmc
Part number
C13043BA05
Part serial
C13043034699
Condition
Faulted
Location
Zone 100
Part time
21,126 hours, 10,553 cycles
Stage of operation
CL
How discovered
O
Nature of condition
J
Precautionary procedure
A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

AP1 WAS NOT RELIABLE IN REGARDS TO SPEED OR ALTITUDE. ATTEMPTED TWICE. PERFORMED POST FLIGHT REPORT, NO FAULTS LOGGED. PERFORMED AFS TEST, FMGC 1 FAILED TEST. RESET FMGC1 SYS & PERFORMED AFS TEST A SECOND TIME, ALL TEST PASSED. PERFORMED LAND TEST, TEST FAILED ON TEST -7. PERFORMED AFS TEST A THIRD TIME, FAILED FMGC 1 AGAIN. FMGC 1 REQUIRES REPLACEMENT. DUE TO RECENT HISTORY WITH FCU FAULTS, RECOMMEND FCU REPLACEMENT AS WELL. REF AMM 22-97-00-710-001-A, AMM 22-96-00-710-001-A. R & R FMGC1 REF MM TASK 22-83-34-400-001-C1. ALL TESTS PASS & GND CHK GOOD. ALSO S/W CONFIG CHKS GOOD. PERFORMED CAT LAND TEST REF MM 22-97-00/201, TEST PASSED. A/C REMAINS FULL CAT CAPABLE. R & R FCU REF MM TASK 22-81-12-400-001-A. ALL TESTS PASS & GND CHKS GOOD. PERFORMED CAT LAND TEST REF MM 22-97-00/201, TEST PASSED. A/C REMAINS FULL CAT CAPABLE.

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