Evaluate avionics technicians, training programs and repair facilities; investigate incidents; inspect aircraft and related equipment.

Air Carrier Avionics Inspector Key Requirements

• Aircraft avionics experience involving the maintenance, repair, and troubleshooting of installed avionics systems on aircraft 
• Avionics maintenance experience on aircraft of more than 12,500 pounds maximum certificated takeoff weight
• Aircraft avionics work experience (which could include supervision or auditing) in a repair station; air carrier repair facility; military repair facility; or local, state, or Federal governmental agency
• Aircraft avionics work experience within the last 3 years 

General Aviation Avionics Inspector Key Requirements

• Aircraft avionics experience involving the maintenance, repair, and troubleshooting of installed avionics systems on aircraft 
• Aircraft avionics work experience (which could include supervision or auditing) in a repair station; air carrier repair facility; military repair facility; or local, state, or Federal governmental agency
• Aircraft avionics work experience within the last 3 years

Qualifications

Air carrier avionics inspectors must have experience in maintenance and repair of avionics systems on aircraft with takeoff weight of more than 12,500 pounds. General aviation avionics inspectors must have similar experience for aircraft with takeoff weight of 12,500 pounds or less.
Here is a link to the full OPM Basic Qualifications and Classification Standards for the Aviation Safety Inspector (1825 series)