Aircraft Maintenance Manual (AMM) The Aircraft Maintenance Manual (AMM) is one of the most important manufacturer manuals used in aviation maintenance. It provides approved, step-by-step instructions for maintaining, inspecting, troubleshooting, and repairing an aircraft. The Aircraft Maintenance Manual provides step-by-step, ATA-organized procedures essential for safe and compliant aircraft maintenance All maintenance actions performed on an aircraft must follow the procedures described in the AMM to ensure safety, airworthiness, and regulatory compliance. What Does the AMM Provide? The AMM contains detailed and structured information that guides maintenance personnel through every aspect of aircraft maintenance. Step-by-Step Maintenance Procedures: Clear instructions describing how to perform maintenance tasks correctly and safely. Scheduled Maintenance Tasks: Tasks required at specific intervals based on flight hours, cycles, or calendar time. Troubleshooting...

Preventive vs Corrective Maintenance: Key Differences Explained Aircraft maintenance is broadly classified into preventive and corrective maintenance. Both are crucial for ensuring airworthiness, safety, and operational reliability. Comparison Table: Preventive vs Corrective Maintenance Aspect Preventive Maintenance Corrective Maintenance Purpose Prevent failures before they occur Repair or replace failed components Timing Performed at scheduled intervals (time, flight hours, or cycles) Performed after a fault or malfunction is detected Approach Proactive / planned Reactive / unplanned Examples Replacing filters, lubricating moving parts, scheduled inspections Fixing a faulty hydraulic pump, replacing failed avionics or sensors Objective Maintain continuous airworthiness and reliability Restore airworthiness after failure Impact on Operations Minimal disruption if scheduled properly Can cause flight delays or aircraft downtime Su...

Aircraft Maintenance Checks Overview: A, B, C and D Checks Explained Aircraft maintenance is not performed randomly. Instead, it follows a structured and scheduled system known as maintenance checks . These checks ensure that aircraft remain safe, reliable, and airworthy throughout their operational life. Scheduled aircraft maintenance checks based on flight hours, cycles, and calendar time The most common scheduled maintenance checks are: A Check B Check C Check D Check Each check has a specific scope, frequency, and level of inspection. Basis of Maintenance Checks Aircraft maintenance checks are scheduled based on: Flight hours – Total hours the aircraft has flown Flight cycles – One takeoff and landing equals one cycle Calendar time – Daily, weekly, monthly, or yearly intervals These intervals are defined by the aircraft manufacturer and approved by aviation authorities such as FAA and EASA. A Check The A Check is a light and frequent ma...