He got scared.

I was alone. You're taking her with us. Do as you said. Come on, you've been waiting to say it. Don't be stupid. Are there other people here in the archi… Let the pilot go. There's a certain paranoia here. See, Mr. Corrigan... But you can't use it without me. Still, we haven't located the takeoff po… Nothing I say will make any difference. Fingerprints on the brass. Stand by and let's get it going. Well, it'll shut me up, that's for sure.