2 Pilot Maintenance
A licensed pilot who is the owner or operator of the aeroplane may carry out the following:
• 50 hour check if the aeroplane is operated for private purposes;
• Certain maintenance tasks prescribed in Regulation 16 of the Air Navigation (General) Regulations 1993 (as amended), if the aeroplane
is operated for private purposes.
The issue of a Certificate of Release to Service is not required. The pilot must include his/her pilot's licence number with his/her signature
in the appropriate log book(s)..
From page 19 of CAP 411 - LAMS. Presuming it's a light aircraft for non-commercial use.
The Air Nav Reg 1993 says
Pilots maintenance—prescribed repairs or replacements
16. For the purposes of article 11(3), the following repairs or replacements are hereby prescribed—
(1) Replacement of landing gear tyres, landing skids or skid shoes;
(2) Replacement of elastic shock absorber cord units on landing gear where special tools are not required;
(3) Replacement of defective safety wiring or split pins excluding those in engine, transmission, flight control and rotor systems;
(4) Patch-repairs to fabric not requiring rib stitching or the removal of structural parts or control surfaces, if the repairs do not cover up structural damage and do not include repairs to rotor blades;
(5) Repairs to upholstery and decorative furnishing of the cabin or cockpit interior when repair does not require dismantling of any structure or operating system or interfere with an operating system or affect the structure of the aircraft;
(6) Repairs, not requiring welding, to fairings, non-structural cover plates and cowlings;
(7) Replacement of side windows where that work does not interfere with the structure or with any operating system;
(8) Replacement of safety belts or safety harness;
(9) Replacement of seats or seat parts not involving dismantling of any structure or of any operating system;
(10) Replacement of bulbs, reflectors, glasses, lenses or lights;
(11) Replacement of any cowling not requiring removal of the propeller, rotors or disconnection of engine or flight controls;
(12) Replacement of unserviceable sparking plugs;
(13) Replacement of batteries;
(14) Replacement of wings and tail surfaces and controls, the attachments of which are designed to provide for assembly immediately before each flight and dismantling after each flight;
(15) Replacement of main rotor blades that are designed for removal where special tools are not required;
(16) Replacement of generator and fan belts designed for removal where special tools are not required;
(17) Replacement of VHF communication equipment, being equipment which is not combined with navigation equipment.
If its VHF, it looks like you're covered by item 17.
The Air Navigation (General) Regulations 1993
Hope this helps. I assume by your initial post that you intend to remove an LRU, have it repaired and refit it?