Service difficulty report · Radio Altimeter · Doug MD11

Difficulty date
December 12, 1997
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N583FE
Make and model
Doug MD11
Aircraft serial
48421
Part
Radio Altimeter
Part number
6224542221
Condition
Failed
Location
Lt Cockpit
Stage of operation
CR
Nature of condition
O
Precautionary procedure
A

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

What was found

97-0252 - ON CLIMB-OUT LOST ATS THEN BOTH AUTOPILOTS ON DESCENT GOT CONTINUOUS GPWS PULL TERRAIN. ON APPROACH LOC CAPTURE THEN LOST TO HEADING-GS WOULD NEVER CAPTURE LOST FD LOC COMMAND BAR. ON CFDS INTERROGATION, SYS FAULTED RA1 AND RA2 IN FDD 1 FCC 1 AND GPWC RTS TEST PASSED. IN FCC2, FCC2 AND GPWC RTS TESTS PASSED. PER MOCC/MDC REQUEST: REMOVED AND REPLACED NR 1RA PER MM 34-42-01-OPS CK NORMAL. TESTED RA2-SYS OPS NORMAL. C/W RA RECV/TRAN LEAK TEST PER MM 34-42-01 SYS OPS NORMAL, RECONFIGURED A/C PERF AFS AUTOLAND TEST ON FCC1 AND FCC2 SYS OPS NORMAL, TESTS PASSED. A/C STATUS REMAINS CAT 3A.

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