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(a) A holder of a licence in category aeroplane or category rotorcraft may perform or supervise, and certify release to service the following maintenance, if rated on the applicable aircraft type:
(1) the applicable inspections required by Part 91, Subpart G or Part 125, Subpart G or Part 135, Subpart G of Group 1 electrical and instrument systems and Group 1, 2, and 3 radio systems:
(2) replacement, adjustment, and function testing of electrical and instrument components and systems performed within the aircraft (excluding compass systems) except where special test equipment is required:
(3) maintenance of electrical storage batteries:
(4) maintenance of radio systems:
(5) replacement of line replaceable units:
(6) compass systems limited to the compensation of direct and remote reading compasses, and component changes in direct reading compass systems.
(b) The holder of a licence in category powerplant may perform or supervise, and certify for release to service the following maintenance, if rated on the applicable powerplant type:
(1) functional checks and testing of engine instruments provided no special testing equipment is required:
(2) replacement, adjustment and functional testing of components and systems associated with the engine provided no special test equipment is required:
(3) replacement of avionic line replaceable units associated with the powerplant.
(c) The holder of a rated licence in category electrical, instrument, or radio may perform or supervise, and certify for release to service the following maintenance:
(1) the applicable inspections required by Part 91, Subpart G or Part 125, Subpart G or Part 135, Subpart G of Group 1 electrical and instrument, and Group 1, 2, and 3 radio systems:
(2) replacement, adjustment, and function testing of electrical and instrument components and systems (excluding compass systems) performed within the aircraft except where special test equipment is required:
(3) maintenance of electrical storage batteries:
(4) maintenance and installation of radio systems:
(5) replacement of line replaceable units:
(6) re-calculate weight and balance.
(d) The holder of a rated licence in category lighter than air aircraft may perform or supervise, and certify for release to service the following maintenance:
(1) routine inspections required by Part 91, Subpart G or Part 125, Subpart G or Part 135, Subpart G:
(2) replacement, adjustment, and function testing of electrical and instrument components and systems (excluding compass systems) except where special test equipment is required:
(3) repair and replacement of interwiring and instrument plumbing:
(4) maintenance of radio systems:
(5) compensation and component changing of direct reading compasses.
