Originally Posted by
rvfanatic
I feel like the confusion could all be solved with a 121 equivalent of “other time” like the USAF uses to encompass time when not in the seat.
14 CFR 121 does not prescribe the logging of flight time.
That would be 14 CFR 61.51, which has nothing to do with Part 121.
There is FAA Chief Legal Counsel interpretation available which points to logging time for that time only when one is assigned duty.
In most long range 121 flying, each crew member is assigned duty for the duration of the trip, per the flight release. Where one is assigned duty and where one's time flight time (block time, per Chief Legal Counsel Interpretation) is accountable toward 30 and 90 day, and 12 month limits, one has certainly acted as a required crew member under the regulation applicable to the flight, which meets the requirements of 14 CFR 61.51 (logging of flight time).