SDR ASAA2017100622136

Service difficulty report · Fmc · Boeing 737990ER

Difficulty date: October 6, 2017
Submitted: October 10, 2017
Operation: Air carrier
Aircraft: N413AS
Make and model: Boeing 737990ER
Aircraft serial: 35205
Aircraft time: 18,232 hours, 5,929 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Part number: 1762000101
Part serial: 005377
Condition: Failed
Location: Right
Part time: 28,963 hours, 8,641 cycles
Stage of operation: NR
How discovered: 9
Nature of condition: J
Precautionary procedure: O

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

What was found

RIGHT FMC INOPERATIVE. ACFT GROUNDED. ON INITIAL EVALUATION, FOUND THE RT FMC INOPERATIVE. FMC VALID LIGHT NOT ILLUMINATED. CYCLED THE CIRCUIT BREAKER AND SYSTEM RESTORED. ACCOMPLISHED FMC LT AND RT FAULT DOWNLOAD. AFTER FAULT DOWNLOAD, RT FMC FAILED AGAIN. REPLACED THE RT FMC. CROSSLOADED SOFTWARE, OPS NORMAL IAW AMM 34-61-02, AND 34-61-00. GROUND VERIFICATION GOOD.