What is the duty of an A&P mechanic?

Prepare for the Aircraft Maintenance Technician 40 OandP Exam. Practice with flashcards and multiple choice questions. Each question is accompanied by hints and explanations to support your learning. Ace your exam with confidence!

An A&P mechanic’s main duty is to perform prescribed maintenance, preventive maintenance, and alterations of aircraft in accordance with FAA regulations and to ensure the aircraft remains airworthy. This means carrying out work using approved data, inspecting and troubleshooting systems, repairing or replacing components, and performing approved modifications. Preventive maintenance covers routine tasks like lubrication, servicing, and simple inspections that keep the aircraft in safe condition without requiring a full airworthiness inspection every time. After the work is done, the mechanic (or another authorized person) signs off the release to service, confirming the aircraft conforms to its type design and is safe to fly. Airworthiness is about meeting the required design and safe condition, not just performing any check or designing new systems or certifying pilots.