SDR ASAA2020012863981

Service difficulty report · Fmc · Boeing 737990ER

Difficulty date: January 26, 2020
Submitted: January 29, 2020
Operation: Air carrier
Aircraft: N453AS
Make and model: Boeing 737990ER
Aircraft serial: 36354
Aircraft time: 24,068 hours, 7,701 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Malfunctioned
Location: Left
Stage of operation: CL
How discovered: O
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

DURIING CLIMBOUT AT FL280, EXPERIENCED SINGLE LEFT FMC FAILURE THAT CORRECTED ITSELF WITHIN 1 MINUTE. GROUNDED - YES. PERFORMED FMC BITE/IN FLT FAULTS TO CHECK FMC OPS STATUS. NO CURRENT FAULTS. R/H FMC DID RECORD LEFT FAIL ON LAST FLT LEG-NO OTHER FAULTS. NO RECORDED FAULTS USING ENG CODE 300/100 REF B737-900 FIM 34-61 TASK 801. PERFORMED FMC #1 OPERATIONAL CK REF B737-900 AMM 34-61-00. NO FAULTS FOUND-OPS TEST GOOD. ETOPS SIGNIFICANT SYSTEM GROUND VERIFICATION SUCCESSFUL.