DNA to this subject
Section 61.118 of the FAR would apply here. The relevant
provisions read:
Except as provided in paragraph[] a...of this section, a private pilot may not act as pilot in command [PIC] of an aircraft that is carrying passengers or property for compensation or hire; nor may he, for compensation or hire, act as pilot in command of an aircraft.
You said best when you said ""No, it is not. It is part of the job,""
http://www.faa.gov/about/office_org...randy hurst - (2013) legal interpretation.pdf
again does not apply, no where does that mention the issue here.
Generally, private pilots are prohibited from acting as pilot in command of an aircraft for compensation or hire. See 14 C.F .R. § 61.113( a).
However, a private pilot may conduct operations for compensation or hire when the flight is incidental to a business or employment and the aircraft does not carry passengers or property for compensation or hire. See § 61.113(b).
again does not apply to the issues in this thread, but does reinforce that the Mechanic can fly the aircraft as incidental to their job for trouble shooting flight control rigging and finding oil leak pick up and delivery etc. and bill all the time repairing the aircraft.