Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Distraction; Communication Breakdown
Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Environment - Non Weather Related; Human Factors
It was a configuration 2 takeoff out of ZZZ and I was the PF. After passing 1;000 feet AFE; I selected climb power and the FO verified climb power. After accelerating through 'Flap' speed I called for 'Flaps 1;' the FO selected flaps 1 and called 'Flaps 1.' After the flaps were at 1 and as the airspeed was accelerating to '[Clean]' speed; I engaged auto pilot 1 and stated 'Autopilot 1.' While confirming autopilot 1 engagement on the FMA; I heard the FO say 'flaps up' while disarming the spoilers. I immediately stated 'Negative; Negative!' and reset the flap lever back to Flaps 1. After accelerating through '[Clean]' speed the flaps were retracted.I feel that saying 'Autopilot 1 or 2' can be confused with a flap configuration change. I have also noticed basic mistakes occurring with pilots returning from leave. It seems to happen a short time after their return to the line when comfort levels are starting to return.I feel that the PF should select autopilot on and use the callout 'Autopilot IS on.'
Air carrier Captain reported a flap setting issue during climbout and stated that a callout sounding similar to the flap callout may have caused confusion.