Avionics Line Maintenance Fundamentals

Course Description

AMT1261 — Avionics Line Maintenance Fundamentals is a college-credit lecture course in Florida's Avionics college-credit programs. The course covers the practical skills, procedures, and regulatory framework for performing line-level avionics maintenance on aircraft — the work performed at the airport ramp, fixed-base operator (FBO), or maintenance hangar to keep aircraft electronic systems operational. Distinct from bench-level component repair (typically performed at FAA Part 145 repair stations), line maintenance focuses on troubleshooting at the aircraft level, removal and replacement of Line Replaceable Units (LRUs), system testing, and return-to-service procedures.

This course is offered at Broward College Aviation Institute and other Florida college-credit avionics programs that distinguish line maintenance from shop maintenance in their curriculum structure.

Learning Outcomes

Required Outcomes

Upon successful completion of AMT1261, students will be able to:

• Apply aircraft-level avionics troubleshooting using built-in test equipment (BITE), maintenance computers, and central maintenance systems on modern aircraft.
• Perform removal and replacement of Line Replaceable Units (LRUs): navigation receivers, communication transceivers, transponders, ADS-B units, weather radar, autopilot computers, FMS units.
• Apply functional testing after LRU replacement: VOR receiver checks, ILS checks, transponder checks per 14 CFR 91.413, ADS-B performance verification.
• Apply configuration management: software loading and verification on modern aircraft (FMS database updates, navigation database currency, equipment software loads).
• Apply regulatory framework for avionics line maintenance: 14 CFR Parts 43, 65, 91, 121, 135, 145; difference between minor and major repairs/alterations; FAA Form 337 requirements.
• Apply Minimum Equipment List (MEL) usage: deferral procedures; required vs. inoperative equipment; placarding; time-limited deferrals.
• Document line-maintenance work per 14 CFR 43.9: aircraft logbook entries; discrepancy and corrective action documentation; return-to-service signoffs.
• Apply airline operational practices introductory awareness: turnaround time pressure; coordination with flight crew, dispatch, ground operations; safety considerations during line work.
• Apply ramp safety: aircraft ground-power connection and disconnection; engine ground-running awareness; fueling-area safety; ramp-vehicle awareness.
• Apply tool control and FOD prevention at line maintenance level.

Optional Outcomes

• Apply introductory familiarity with airline-specific maintenance computer systems (e.g., the various airline reliability and maintenance management systems).
• Apply composite repair awareness for radomes and antenna covers (cosmetic vs. structural).

Major Topics

Required Topics

• Aircraft-Level Troubleshooting: Built-in test equipment (BITE); maintenance computers (CFDS, CMC, IDS); central maintenance system access; fault history extraction; correlation of cockpit indications with maintenance messages.
• LRU Removal and Replacement: Procedures for typical avionics LRUs; static-discharge precautions during handling; LRU shipping and tagging (serviceable, unserviceable, repaired); ATA Spec 2000 RFID/tagging.
• Functional Testing After Replacement: VOR receiver test (VOT or operational check per 14 CFR 91.171); ILS check; transponder test per 14 CFR 91.413 (24-month interval); ADS-B performance check; pitot-static test per 14 CFR 91.411 (24-month interval, when relevant to instrument LRU work).
• Software Configuration: Database loading via Loadable Software Aircraft Part (LSAP) procedures; navigation database currency (28-day cycle); equipment software updates per service bulletins.
• Regulatory Framework: 14 CFR Part 43 (general); Part 65 (mechanic privileges and limitations); Part 91 (general operating); Part 121 (airline operating); Part 135 (commuter and on-demand); Part 145 (repair stations); appendix A to Part 43 (major alterations and repairs); FAA Form 337 use.
• MEL/CDL Application: Minimum Equipment List structure; configuration deviation list; categories (A, B, C, D); deferral procedures; placarding requirements; required equipment recognition.
• Documentation: 14 CFR 43.9 logbook entries; squawk and corrective action; return-to-service authority; cumulative records.
• Airline Operations: Turnaround time constraints; coordination with crew/dispatch/ground; ramp procedures; communication discipline.
• Ramp Safety: Aircraft ground-power; battery ground-power vs. external power; engine-running awareness; fueling and defueling area discipline; vehicle and equipment movement; lighting and visibility.
• Tool Control and FOD: Tool inventory before and after task; foreign-object damage prevention; clean-as-you-go practice; debris control during cabin/cockpit work.

Resources & Tools

• 14 CFR Parts 43, 65, 91, 121, 135, 145
• FAA AC 43.13-1B and 43.13-2B
• Aircraft maintenance manuals (AMM) and Fault Isolation Manuals (FIM) for representative aircraft (typically Cessna Citation, Embraer 175, Boeing 737NG, Airbus A320 family training materials at college level)
• ATA Spec 100 chapter structure
• Standard avionics line-maintenance test equipment
• NCATT AET certification preparation materials

Career Pathways

AMT1261 directly prepares students for line-level avionics technician roles in:

• Airline Line Maintenance at Florida airline hubs (American Miami, Delta Orlando/Tampa, JetBlue Fort Lauderdale, Spirit FLL, Southwest Tampa) — high-pressure, high-volume environment with strong wages.
• FBO Avionics Maintenance at major Florida FBOs (Signature Flight Support, Atlantic Aviation, Sheltair) supporting business-aviation customers.
• Corporate Flight Department Avionics for Florida corporate fleet operations.
• Avionics Service Truck Operations — mobile avionics service supporting GA airports across Florida.
• Continuation toward FAA Part 145 repair-station bench-technician roles requiring deeper component-level expertise.

Special Information

NCATT Aircraft Electronics Technician (AET) Certification

This course supports preparation for NCATT AET certification, widely recognized by Florida avionics employers as evidence of foundational avionics knowledge equivalent to industry-recognized standards.

Line vs. Shop Maintenance Distinction

Line maintenance is typically aircraft-level work: troubleshooting on the airplane, R&R of LRUs, return-to-service testing. Shop (or "bench") maintenance is component-level work performed at FAA Part 145 repair stations: repair of removed LRUs, calibration, modification. Avionics technicians may specialize in line work, shop work, or work both. Line technicians need broad systems knowledge, troubleshooting skill, and time-pressure tolerance; shop technicians need component-level depth, soldering and hardware skills, and methodical approach.

Course Format

Typically 3 credits, 45 contact hours (lecture-only; the companion lab is delivered as AMT1261L per Florida SCNS — the matching laboratory section).

Articulation

AMT1261 typically articulates toward the A.S. in Avionics at Florida College System institutions, and supports continuing study toward upper-division aviation/avionics programs.