Large Transport
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 135; Flight Crew Type 135
Other / Unknown
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew FLC Overrode Automation; General Maintenance Action
Chart Or Publication; Human Factors; Procedure
During briefing and preparation for arrival; we discovered the altitudes on the arrival did not match the FMC. Upon checking the database we found the [future] database to be active. We verified the fixes and altitudes on the arrival and approach and proceeded without incident. At the gate; Maintenance verified that they had done a NAV update the night before. It seems the new database was put in the current use line prematurely by Maintenance during the update. We missed the error during our preflight.
While at cruise at FL370; we were going through the arrival briefing. It was my leg (FO) and I briefed from the CDU while the Captain followed along on the Electric Flight Bag (EFB) charts. The Captain noticed conflicting data between what the two sources of data (EFB/CDU) were presenting. At this point we checked the navigation database and noticed it to be improperly loaded with the next version not scheduled to be loaded until [later]. At this point we verified the correct altitudes were loaded into the arrival per the current approach plates. We landed; and after talking with maintenance; determined that maintenance improperly loaded and made 'active' the incorrect database on the previous night. In addition I; the FO; did not verify the correct NAV database was loaded during my preflight inspection.
The crew noticed an altitude discrepancy between the Electric Flight Bag (EFB) and the FMC on the arrival procedure. It was determined that maintenance had updated the database the night before and had prematurely activated that new revision.