You’ll note the
LOI request was internal from a FSDO manager. And the individuals who are complaining the loudest have limited experience with actually supervising others performing mx tasks. There’s more to this than just the LOI.
If you read the 1st two and last paragraphs of the LOI you’ll see that it is in reference to external electronic supervision and electronics records. However, those complaining have cherry-picked one supporting reference and made turned it into the main issue. Plus the fact 2 of the 3 people who challenged this LOI also represent 2 large aviation trade associations is the only reason its become an issue to the “industry”, ie., their specific part of the industry.
If you look back to CAR 18 it was defined as “a person who works under the direct supervision.” Then under Part 43 it was changed to its current definition, “the supervisor is readily available, in person." To argue the current verbiage still means the same as the previous verbiage, is BS. I think all 3 complainers need to brush up on their regulatory history before they dig themselves a deeper hole.