Beats me.
3 seconds sound clip from the The High and the Mighty (1954) movie soundboard.
You can hear this line at 01:00:19 in the DVD version of the movie.
Quote context
[...]
- I'll make you a bet right now, we're late getting into San Francisco.
- Nope.
- Well, what do you suppose it could it be?
- I'll let you know in a couple of minutes.
- Nothing wrong with the tail.
- The number one head temperature has gone up five degrees in the past hour.
- San Francisco wants to know the nature of our trouble.
[...]