|Quoting 411A (Reply 1):|
ONLY in certificated air transportation, IE; 14CFR121, and within the same company.... and NOT in 14CFR135
|Quoting Tb727 (Reply 3):|
I am an ATP and I am a training captain at my 135 company
Training programs for 121 and 135 must be approved by the FAA. As an ATP you can provide instruction in air carrier operations be it 121.125 or 135, as provided in the air carriers Approved Training Manual.
Only if it is done under an FAA approved training program.
Here are some excerpts from the FAR
's that apply (abbreviated)
61.167 ATP Certificate Holder Privileges.
(b) An airline transport pilot may instruct---
(1) Other pilots in air transportation service in aircraft of the category, class, and type, as applicable, for which the airline transport pilot is rated and endorse the logbook or other training record of the person to whom training has been given;
(2) In flight simulators, and flight training devices representing the aircraft referenced in paragraph (b)(1) of this section, when instructing under the provisions of this section and endorse the logbook or other training record of the person to whom training has been given;
"When once you have tasted flight, you will forever walk the earth with your eyes turned skyward" Leonardo Da Vinci