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How many of your planes are old USAir 73s?

I believe nine are ex USAir

Make that eleven, nine 400s and two 300s

I thought I saw 513US in MBJ last year. 442US was the last 737 I flew in 2012. Hard to believe they are still flying.

What he said. One thing is to review the Mel to know how it may affect your next flight, but not to make decisions on the current flight.

Don’t quite agree here.
Take for instance the altitude Alerter, the QRH won’t tell you that you can’t fly in RVSM Airspace but the MEL/DDG does.

The supplement section of the AFM, depending on the after market installation STC provides information, not contained within the QRH.

Section 2.2.2 of AC 90-85 defines the eligibility for RVSM operations. The limitations section of the Airplane Flight Manual (AFM) or AFM Supplement (AFMS) should indicate the aircraft has been determined to be capable of meeting the RVSM performance requirements of 14 CFR part 91 appendix G.

Some STCs, are more limiting, requiring operating TCAS, while the Advisory Circular 91-85 does not.

You’re not required to read AFM supplements or AC’s during flight

You should know the required equipment for RSVM of the top of your head.
I know it's an interview question....

This without a doubt!!!!