SDR ASAA2019091830733

Service difficulty report · Fmc · Boeing 737990ER

Difficulty date: September 18, 2019
Submitted: September 20, 2019
Operation: Air carrier
Aircraft: N492AS
Make and model: Boeing 737990ER
Aircraft serial: 44110
Aircraft time: 15,287 hours, 5,008 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Locked
Location: Right
Stage of operation: NR
How discovered: O
Nature of condition: O
Precautionary procedure: K

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

What was found

UNABLE TO INITIALIZE LEFT OR RIGHT FMC WILL NOT ACCEPT ENTRY FROM LEFT OR RIGHT KEYPAD. GROUNDED - YES. RT FMC LOCKED UP & CAUSED THE LEFT TO LOCK UP TOO. REBOOTED RT FMC REF FIM TASK 34-61 TSK 836 NORM OPS RESTORED ON BOTH. OPENED & CLOSED 2 C/B'S BITE CK OK OFF FMC LT & RT OK.