SDR AALA20150418007

Service difficulty report · Fmc · Boeing 757223

Difficulty date: April 18, 2015
Submitted: April 20, 2015
Operation: Air carrier
Aircraft: N692AA
Make and model: Boeing 757223
Aircraft serial: 26972
Aircraft time: 76,018 hours, 21,058 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Part number: 4052506955
Condition: Faulty
Location: Right
Stage of operation: CR
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

ALL THREE AUTOPILOTS FAILED ALONG WITH RT FMC. ACCOMPLISHED BITE OF FMC BITE IAW FIM 34-61-00, AUTO FLIGHT IAW FIM 22-02 TASK 815-818, BPCU IAW FIM 24-20 TASK 815-801 & EEC IAW FIM 73-21-00-902. EMERGENCY DECLARED, RETURNED TO DEPARTURE, AND LANDING WAS UNEVENTFUL. R & R RT FMC IAW AMM 34-61-01 & 34-61-01-424-005-002. PERFORMED FMC SOFTWARE CROSS LOAD IAW AMM 34-61-00-342-009-004. ALL OPERATIONAL CHECKED GOOD.