Airbus Industrie Undifferentiated or Other Model
Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Troubleshooting; Situational Awareness; Distraction
Aircraft Equipment Problem Less Severe; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Human Factors
Departure clearance was via ZILLI 4 RNAV Departure with LAUER transition from Runway 25R. Early in takeoff roll; after thrust was set; ECAM 'Hot Brake' annunciated. One of the brakes indicated 300 degrees. My decision was to continue the takeoff. At 'Positive Rate' callout I decided to leave the gear down to cool the brake. AP1 (Autopilot 1) was engaged somewhere before reaching DOCKR waypoint. LAX Tower had us contact SoCal on 124.3. Crossing DOCKR waypoint; the aircraft failed to turn left toward WEILR waypoint. I failed to notice that deviation. About 1- 1.5 miles past DOCKR the FO (First Officer) alerted me about the deviation. I selected HDG (heading) mode and turned left to intercept the course to WEILR waypoint. At Flaps 0 callout I also called for 'Gear Up'. SoCal gave us Direct TANDY at about that time. Flight was uneventful from then on. The course deviation was because I did not ensure NAV (navigation) mode after reaching 400 feet AGL. I allowed the hot brake and gear down situation to distract me from flying the aircraft.
We are departing from Runway 25R; ZILLI4 RNAV Departure. To LAUER transition. During the take off roll; as engine was spooling up and accelerating; we had ECAM annunciated one of the brake is 300 degrees. We continued to takeoff; and kept the gear down to cool the brake. Captain engaged AP1 (Autopilot 1). As we handed over [to] Departure; ATC advised us the Tower noticed we still had gear down; and we explained keeping it down for a little longer to cool brake. When we passed DOCKER; we supposed to make left turn to WEILER; however we kept going straight on heading 251. So; I pointed to Captain to make left turn. As we are turning left; ATC gave us direct to TANDY. The curse deviation was because we did not confirm NAV (navigation) selected. We were in HDG (heading) mode. Although; we kept gear down due to hot brake was distraction; we must check and confirm FMA.
Airbus flight crew reported course deviation during climb out.