A320
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 30; Flight Crew Type 296
Situational Awareness; Confusion
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural MEL / CDL; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural FAR
Aircraft; Human Factors
Pack 2 deferred was inoperative. After number 2 engine start we did a status check and noticed pack 2 inop which was expected. Below this was AP 2 inop. Expectation bias and fatigue caused failure to realize that AP 2 inop was not related to Pack 2 inop. Continued normal taxi and takeoff without AP 2 inop maintenance logbook entry. Wrote up entry during cruise. [Maintenance Control] communicated that this was an FMGC 2 failure after second engine start. Fatigue was an issue here.
[Report narrative contained no addition information.]
A320 flight crew reported not documenting an aircraft equipment problem in the maintenance log.