CAAM Part 66 - Certifying Staff - Maintenance
CAAM Part 66 - Certifying Staff - Maintenance
This domain tests who may certify maintenance and under what limits. The key distinction is between holding a Part 66 licence and holding a maintenance organisation's certification authorisation.
Licence categories
CAAM Part 66 licences are issued in categories A, B1, B2 and C. Category A covers limited line maintenance tasks; B1 covers mechanical, airframe, powerplant and related systems; B2 covers avionics; category C is base maintenance certifying staff. Each category has privileges defined by the regulation, not by employer preference.
Licence and authorisation
The licence demonstrates qualification. The Part 145 organisation issues a certification authorisation that states the scope, aircraft types and limitations. A certifier must work within that authorisation and use current approved data, proper tools and access to facilities.
Worked example
A B2 avionics licence holder is asked to certify replacement of a hydraulic landing-gear actuator. The actuator is a mechanical/hydraulic system task, so it falls outside B2 avionics privileges. The correct action is to refer it to a B1 or other suitably authorised certifier. Holding a licence does not override category scope.
Traps
The licence alone does not authorise every task. An authorisation can be narrower than the licence. Category C does not mean "any task on base maintenance"; it is a release role with defined privileges. Support staff who perform work are not certifying staff unless authorised.