A commercial pilot friend of mine has question on cabin ozone which he and his fellow pilots cannot answer. Perhaps the experts on the forum can provide an answer. Here is the question.
While flying from Iceland to Dulles, their airplane, a 757, diverted around some thunderstorms in the area, they were at a cruise altitude near 35000 feet.
A powerful electrical smell invaded the cabin, causing some alarm, but no smoke was present. (At this point I figured one of the recirculation fans for the air conditioning system burned up, it happens, they are electrical motors and can fail).
The pilots came on the PA explaining that there was nothing wrong with the plane itself, and what people were smelling was ozone from the electrical activity near the thunderstorms. The smell did go away.
I now have about 7800 hours, have flown in and around just about everything, and have never ever heard of this, not have any of my pilot friends.
I know ozone has a particular smell, but I think most aircraft have ozone scrubbers as part of their air filtration systems ( don't know about the 737...)
William the Pilot