SDR ASAA2019080753327

Service difficulty report · Display · Boeing 737990ER

Difficulty date: August 5, 2019
Submitted: August 7, 2019
Operation: Air carrier
Aircraft: N402AS
Make and model: Boeing 737990ER
Aircraft serial: 41189
Aircraft time: 26,753 hours, 8,732 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Display
Condition: Malfunctioned
Location: First Officer'S
Stage of operation: CR
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

AT 1:45 INTO THE FLIGHT AT FL340, FO'S NAVIGATION DISPLAY VTK FOLLOWED BY MAP FAILURE FLAGS, THIS LASTED FOR (2) MINUTES. SINGLE FMC OPERATION IN SCRATCHPAD WAS NOT DISPLAYED AND NO FMC DATA DID NOT OCCUR. NORMAL OPERATIONS ON FO NAVIGATION DISPLAY. RETURNED, NORMAL OPERATIONS ESTABLISHED. GROUNDED - YES. ACCOMPLISHED GROUND VERIFICATION B737-900 FIM 34-61 TASK 836 OPS AND TESTED NORMAL. RESET C/B FMC CMTR2 NO VTK AND MAP FAILURE FLAGS NOTED.