A person who fixes planes is commonly referred to as an aircraft mechanic or aviation maintenance technician. These professionals are responsible for inspecting, repairing, and maintaining aircraft to ensure they are safe and operational. They may work on various systems, including engines, electrical systems, and airframes.
What you call person who fixes light
Horologist
Horologist .
A mechanic.
Horologist .
A person who fixes compasses is typically known as a compass adjuster or compass technician.
A person who fixes the glass portion of windows is called a glazier.
Cobbler
Mechanic
A plumber
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A person that fixes lights is called an electrician. They are able to fix and repair electric wiring, lights, and appliances.