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Aircraft Maintenance Technician Job Description

Aircraft Maintenance Technicians (AMTs) — commonly called A&P mechanics — inspect, repair, and maintain aircraft structures, systems, and powerplants to ensure airworthiness. They perform everything from routine 100-hour checks to major structural repairs, working from manufacturer maintenance manuals and FAA-approved data to certify that aircraft are safe to fly.

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Role at a glance

Typical education
Two-year FAA-approved Aviation Maintenance Technician School (AMTS) or military equivalent
Typical experience
Entry-level to experienced; IA requires 3 years of certificated experience
Key certifications
FAA Airframe and Powerplant (A&P) Certificate, Inspection Authorization (IA), NDT certifications
Top employer types
Commercial airlines, MRO facilities, business aviation FBOs, defense contractors, government aviation programs
Growth outlook
Strong hiring demand due to a projected shortage of tens of thousands of mechanics through the late 2020s
AI impact (through 2030)
Largely unaffected; the role requires physical, hands-on inspection and manual maintenance of complex mechanical systems that cannot be performed remotely.

Duties and responsibilities

  • Perform scheduled maintenance checks (A, B, C, D-Check) per aircraft Maintenance Program and airline-approved procedures
  • Inspect airframe structures, skins, control surfaces, and landing gear for cracks, corrosion, and deformation using visual and NDT methods
  • Troubleshoot and repair aircraft systems including hydraulics, pneumatics, fuel, oxygen, and environmental control using AMM procedures
  • Overhaul, test, and replace aircraft engine components and accessories per engine manufacturer maintenance manuals
  • Remove and install line-replaceable units (LRUs), avionics components, and major assemblies per documented maintenance procedures
  • Perform non-destructive testing (NDT) including dye penetrant, magnetic particle, eddy current, and ultrasonic inspections where qualified
  • Complete aircraft maintenance records, logbook entries, and airworthiness release documentation per FAR Part 43
  • Perform run-up checks, functional tests, and return-to-service verification after maintenance work
  • Respond to Aircraft on Ground (AOG) situations, diagnosing and repairing faults under time pressure to restore aircraft to service
  • Comply with FAA Airworthiness Directives, Service Bulletins, and Engineering Orders applicable to assigned aircraft types

Overview

Aircraft Maintenance Technicians are the people who certify that an aircraft is safe to fly. That's not a symbolic responsibility — when an A&P mechanic signs a logbook entry or completes an airworthiness release, they are legally attesting that the work was performed correctly and that the aircraft meets its type certificate basis. The FAA built this personal accountability into the regulatory framework precisely because errors in aircraft maintenance can be catastrophic.

The work spans an enormous range of tasks. A line maintenance technician at an airline hub might spend a shift diagnosing a hydraulic leak write-up, replacing a faulty landing gear proximity sensor, performing an engine oil check, and completing an A-Check inspection package on a narrowbody aircraft — all before the aircraft pushes back for its first morning departure. A heavy maintenance technician at an MRO facility might spend weeks on a single C-Check, methodically working through hundreds of inspection tasks on a widebody aircraft that won't see revenue service until the work is complete and signed off.

The technical breadth required is genuinely wide. Aircraft systems include hydraulics, pneumatics, environmental control, fuel, electrical, landing gear, flight controls, engines, and avionics — and a certificated A&P mechanic is responsible for maintaining all of them. Most AMTs develop areas of deeper expertise over their careers, but the foundational knowledge must cover the full airplane.

The logbook and records aspect of the role is as important as the wrench work. Every significant maintenance action must be documented with what was done, who did it, what approved data was used, and what was found. Incomplete or inaccurate maintenance records are FAA violations independent of whether the underlying work was correct. Professional AMTs treat documentation with the same discipline they apply to the technical work itself.

Qualifications

Certification requirements:

  • FAA Airframe and Powerplant (A&P) Certificate: mandatory for independent aircraft maintenance work and return-to-service authority
  • Aviation Maintenance Technician School (AMTS): two-year FAA-approved programs at technical colleges and aviation schools
  • Military equivalent: military aircraft mechanics in relevant MOSs (2A6X1, 2A5X1, 15P, etc.) may qualify for A&P through alternative experience documentation
  • Inspection Authorization (IA): additional credential for general aviation inspections; requires 3 years of certificated A&P experience

Aircraft type training:

  • Type-specific training for commercial aircraft (Boeing 737, 777, Airbus A320, A330): typically employer-provided, 2–6 weeks per type
  • Engine familiarization: CFM56, GE90, Pratt & Whitney GTF, or other applicable powerplants

Technical skills:

  • Structural inspection: visual inspection, NDT (dye penetrant, eddy current, ultrasonic — requires separate NDT certifications)
  • Systems troubleshooting: hydraulics, pneumatics, electrical, fuel system fault isolation using AMM fault isolation procedures
  • Engine maintenance: borescope inspection, compressor washes, SOAP oil analysis interpretation, minor component R&R
  • Rigging: flight control cable tension and rigging, trim system calibration, door rigging
  • Computer maintenance systems: Boeing ETOPS/AIMS, Airbus AMM portal, maintenance tracking software (Trax, AMOS, MRO Pro)

Reference documents:

  • Aircraft Maintenance Manual (AMM): the primary maintenance reference for each aircraft type
  • Illustrated Parts Catalog (IPC), Wiring Diagram Manual (WDM), Structural Repair Manual (SRM)
  • Airworthiness Directives (ADs): mandatory compliance documents issued by the FAA
  • Service Bulletins (SBs): manufacturer-recommended modifications and inspection programs

Career outlook

The aviation industry is facing a well-documented shortage of certificated A&P mechanics that will deepen through the late 2020s. AMTS enrollment has not kept pace with the retirements removing experienced technicians from the workforce. The FAA and industry groups project a shortage of tens of thousands of mechanics over the next decade.

For working AMTs, this translates to strong hiring demand across the employment spectrum: airline line and heavy maintenance, independent MROs, business aviation FBOs, defense contractors, and government aviation programs. Signing bonuses, relocation assistance, and starting pay well above what the market offered 10 years ago are common at airlines and major MROs competing for A&P certified mechanics.

The airline maintenance sector has been the dominant employer, and it remains active. Commercial airlines are taking delivery of new aircraft while maintaining their existing fleets through mandatory inspection and maintenance programs. Heavy check work at large MROs is contract-driven and has been expanding as aging fleets require more extensive inspections. The business aviation market, which grew substantially during and after the pandemic, continues to require maintenance support for a larger active fleet.

Military aviation maintenance is a substantial parallel employer. Defense contractors maintaining military aircraft — Lockheed, Boeing Defense, Northrop Grumman, L3Harris, DRS Technologies — hire significant numbers of certificated A&P mechanics for depot-level maintenance. Government pay scales at civilian depot facilities are competitive with airline pay, with strong federal benefits.

The career ceiling for experienced AMTs is meaningful. Lead technicians and inspection supervisors at major airlines earn $90K–$120K. Quality assurance specialists, technical representatives, and FAA designees (DARs, DERs) earn at similar or higher levels. AMTs who add IA credentials, type certifications, and NDT certifications develop an employment profile that is genuinely hard to fill — and the market compensates for that scarcity.

Sample cover letter

Dear Hiring Manager,

I'm applying for the Aircraft Maintenance Technician position at [Company]. I've been an FAA-certified A&P mechanic for seven years, the last four working line and heavy maintenance at [Airline/MRO] on the Boeing 737 NG and MAX fleet.

My day-to-day work covers the range from A-Check task card completion and logbook entries to troubleshooting write-ups that aren't clearing on normal first-look procedures. I'm comfortable working through AMM fault isolation trees on hydraulics, pneumatics, and electrical systems, and I've developed a good eye for when a fault that seems electrical is actually a mechanical root cause that keeps resetting the same BITE code.

A troubleshooting case I'm proud of: we had a 737 coming in repeatedly with the same flap asymmetry CAS message, cleared on every input with no fault found on the primary flap system. I asked to review the maintenance history and found that the message timing always followed a specific ground-power handover sequence. I went into the AMM's secondary reference for the PSEU logic and found a condition where a specific bus sequencing during external power disconnect could momentarily assert the asymmetry monitor without a true asymmetry condition. The engineering team confirmed the finding, and we added a note to the deferred item procedures. That aircraft stopped coming in with the message.

I'm interested in [Company] because of your widebody operation. I've been narrowbody-focused for my entire career and want to develop on the 777 or A330. I'm ready to complete whatever type-specific training is required.

Thank you for your time.

[Your Name]

Frequently asked questions

What does an Aircraft Maintenance Technician do?
Aircraft Maintenance Technicians (AMTs) — commonly called A&P mechanics — inspect, repair, and maintain aircraft structures, systems, and powerplants to ensure airworthiness. They perform everything from routine 100-hour checks to major structural repairs, working from manufacturer maintenance manuals and FAA-approved data to certify that aircraft are safe to fly.
What are the main duties of an Aircraft Maintenance Technician?
Core duties include: perform scheduled maintenance checks (A, B, C, D-Check) per aircraft Maintenance Program and airline-approved procedures; inspect airframe structures, skins, control surfaces, and landing gear for cracks, corrosion, and deformation using visual and NDT methods; and troubleshoot and repair aircraft systems including hydraulics, pneumatics, fuel, oxygen, and environmental control using AMM procedures.
What is an A&P certificate and how do you get one?
The FAA Airframe and Powerplant (A&P) Certificate is the primary qualification for aircraft maintenance technicians. Candidates can qualify through an FAA-approved Aviation Maintenance Technician School (AMTS) — typically a two-year program — or by accumulating 30 months of documented on-the-job experience with both airframe and powerplant work. Certification requires passing three written exams, three oral exams, and three practical tests administered by an FAA designee.
What is an Inspection Authorization (IA) and how does it differ from A&P?
An A&P certificate authorizes maintenance work and minor returns to service. An Inspection Authorization (IA) allows the holder to perform annual inspections on general aviation aircraft and to approve major repairs and alterations for return to service. IAs require holding an A&P for at least 3 years, working actively in aviation maintenance, and passing an annual FAA review. IAs are more common in general aviation than airline maintenance.
What are the different check types in airline maintenance?
A-Checks are routine light maintenance performed roughly every 400–600 flight hours, typically overnight. B-Checks are slightly more comprehensive, often merged with extended A-Checks at modern airlines. C-Checks are heavy maintenance inputs every 3,000–6,000 flight hours or 18–24 months, taking 1–2 weeks. D-Checks (heavy maintenance visits or structural checks) happen every 6–12 years, involve complete aircraft teardown, and take 6–8 weeks. The specific intervals and tasks are defined in each airline's FAA-approved Maintenance Program.
Do Aircraft Maintenance Technicians work rotating shifts?
Yes, particularly at airlines and large MRO facilities that operate around the clock. Line maintenance technicians at airline hubs typically work rotating shifts including nights and weekends to support overnight maintenance windows and AOG response. Heavy maintenance MRO operations often work multiple day shifts with overtime during peak aircraft input periods. Business aviation and FBO maintenance tends to have more standard day-shift schedules.
How is predictive maintenance technology affecting the AMT role?
Airlines are deploying aircraft health monitoring systems that stream engine and systems data in flight, flagging anomalies before they cause failures. This is changing AMT work from reactive troubleshooting to proactive component removal before failure occurs. AMTs are increasingly expected to work with data analytics tools and maintenance planning systems rather than waiting for a write-up to appear in the logbook. Technicians who develop comfort with digital maintenance systems are better positioned as this technology matures.

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