That performance data might exist for their use is not an issue...the original poster asked for advice...not a disertation about other aircraft, PT-6 engines in general, or their use on other aircraft.
Yes, the original poster did indeed ask this advice and counsel...which you incorrectly provided based on ancient information. This is no longer 1966, as you may not be aware.
The title of the thread, of course is "PT6 Operations," which you may have missed in passing. You're correct that the introduction of numerous other irrelevant aircraft has no place here, as you attempted to do with Convair, Boeing, Lockheed, etc.
Whereas the standard, original installation ice vanes in the King Air 90 aircraft have no limitations or restrictions prohibiting their use on takeoff, your assertions and counsel, while entertaining, have been in error, and wrong.
That the FAA approved aircraft flight manual data includes takeoff data for the vanes deployed, is very significant. That you might not think so is somewhat puzzling, but also irrelevant. Truth is, there's no limitation on taking off with the ice vanes deployed, and the manufacturer recommendation is that they be used as required...which includes takeoff.
Again, your counsel has been in error...just as your assertion that your own copy of a BE-20 manual contains a limitation against taking off with the ice vanes deployed...is in error.
Our friend, SNS3Guppy, appears to be unable to answer a specific question, then argues with those who can.
Really? Thus far you've provided counsel contrary to the regulation, looked in sources from which the information isn't to be had, claimed limitations from books you don't own and to which you cannot reference, cited as authority for King Air operating practice the talks with your "
senior inspector" friend, and used to establish your authority in the matter the fact that you flew "
the first commercial PT6A installation on the US West Coast" in 1966, to say nothing of invoking irrelevant makes and models of aircraft ranging from Convairs to Lockheeds and beyond...and have still been unable to answer the question correctly. Yet you elect to point fingers at someone other than yourself? Quite remarkable.
I will give an example.
An applicant applies for a large aircraft type rating.
The FAA Inspector examines the applicant and finds him lacking in ability.
The Inspector issues a notice of disapproval.
Therefore, the inspector has clearly interpreted the specific regulation and issued a denial.
No. Legal Interpretations for and on behalf of the FAA Administrator are done and authorized only by the FAA Regional Legal counsels, and the FAA Cheif Legal Counsel's office. Period.
An inspector at the FSDO level is never authorized to interpret the regulation. Only to apply it.
That application is always subject to review, adjudication, and change...and is never final.
Further, if an inspector (even a "senior inspector") at the FSDO level attempts to provide an interpretation of the regulation, even one in writing, that "interpretation" will never be defensible in administrative court. Why? The inspector doesn't hold that authority.
The inspector has only the authority to apply the regulation, and even then must do so within the bounds of the legal interpretations provided by the FAA Regional and Chief Legal Counsel. This is not new...just something you (and many others) fail to grasp.
What you receive from your "senior inspector" friend isn't defensible in the presence of an Administrative Law Judge. If your friend provides you a letter, on FAA letterhead, giving you an "interpretation" of the regulation and you're subsequently violated for following this interpretation, you can't use it in your defense, because that letter has no authority...that inspector is not authorized, nor enpowered to interpret the regulation...only to apply the regulations within the narrow confines of his or her job. Period.
If the inspector applies the regulation incorrectly, it's certainly subject to review and change by a superior or an Administrative Law Judge...but at now time does the inspector have the authority to interpret or provide an interpretation of the United States Code of Federal Regulations (perhaps better known to you as the "FAR's).