SDR ASAA2022100840204

Service difficulty report · Cdu · Boeing 7379

Difficulty date: October 8, 2022
Submitted: October 10, 2022
Operation: Air carrier
Aircraft: N918AK
Make and model: Boeing 7379
Aircraft serial: 44083
Aircraft time: 5,113 hours, 1,604 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Cdu
Part number: UNKNOWN
Condition: Fault Message
Location: Unknown
Stage of operation: NR
How discovered: V
Nature of condition: J
Precautionary procedure: K

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

What was found

CREW REPORTS FMC DISAGREE MESSAGE. GROUNDED - YES. BOTH FMCS SET ON-GROUND RIGHT CDU FAILURE. GENERATING FAULTS ARE CDU-R ARINC-INTERMITTENT-RATE, AND CDU-R INTERMITTENT-FAILURE. RESET CDU RIGHT POWER. FMC DISAGREE MESSAGES EXTINGUISH. ACCOMPLISHED RIGHT CDU INSTALLATION TESTS PER B737-9 AMM 34-61-01 AND SOFTWARE CONFIGURATION TESTS PER AMM 34-61-00 AND B737-9 AIPC 34-61-01-10 W/ NO DEFECTS INDICATED. ETOPS GROUND VERIFICATION SUCCESSFUL.

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