USA TODAY International Edition

Smoke in the cockpit is not always fire sign

- John Cox John Cox is a retired airline captain and runs aviation consulting company, Safety Operating Systems.

Question: Last weekend, a JetBlue flight had to divert due to smoke and an “electrical smell” in the cockpit. What might cause that, how big of a deal is it and has it ever happened to you? – Anonymous

Answer: An electrical smell must be considered a potential fire until it can be conclusive­ly determined otherwise. Usually, it is a cooling fan or some other electrical device that is hot but not a true fire. An in- flight fire is one of the most serious conditions a pilot can face.

Fortunatel­y, actual fires are very, very rare and pilots train for this situation.

I, too, have experience­d electrical smells and light smoke in the flight deck. We were able to determine the source and isolate the problem component.

Q: Most of the country is preparing to turn their clocks back on Nov. 3. How much of a pain is this for flight crews and dispatcher­s? And do they have as much trouble as the rest of us telling time in places like Arizona where they don’t observe daylight savings time? – Anonymous

A: When on short overnight stays with outbound flights the following morning, I have seen messages from dispatcher­s saying, “Please remember that tonight is the change to/ from daylight saving time.”

Flights that are already in progress at the time of the change are not affected because of the use of Universal Coordinate­d Time, the worldwide standard. It does not change.

The very few areas that do not change are a challenge for crews to remember which time zone they are in during the time of the year.

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