Say Again

Tower: Cessna 2737 you are three miles from final, turn left 270 and expect the RNAV to Runway 27. Pilot: Aye Aye, Captain! Tower: Cessna 2737... read back and repeat all the instructions correctly. Pilot: 10-4! [Nearly 30 seconds later...] Tower: Uhh..., Cessna 2737 please repeat back all instructions immediately!! Pilot: Okay, I am so sorry about that, my co-pilot was at the controls and radio. Turning left to 270, and expecting the RNAV for runway 27 for Cessna 2737. Tower: Readback is correct, and by the way, your co-pilot could use some training! Pilot: Yeah, I concur with you. The only problem is that you can only teach a parrot so much!!