What Kinds of Issues Cause an Aircraft to Be AOG?
An Aircraft on Ground (AOG) event happens when an aircraft is not cleared for service due to an unplanned maintenance problem, an unserviceable component, a missing necessary part, or any other issue that keeps it from flying legally or safely. AOG situations are crucial in the aviation industry because they can cause major disruptions to flight schedules, delay passengers or cargo, and hike up operational costs.
Getting familiar with the most frequent reasons for AOG occurrences can help airlines, maintenance providers, and aircraft operators get better at maintenance planning, cut aircraft downtime, and get aircraft back in service as quickly and safely as possible.
Mechanical Failures
Mechanical issues are one of the most common factors behind AOG events. Both commercial and private aircraft depend on a myriad of related components, and the failure of even one critical system can lead an aircraft to being grounded until repairs are completed.
Common areas in which issues can lead to mechanical failures include:
- Engine
- Hydraulic system
- Landing gear
- Flight control system
- Fuel system
- Electrical system
- Pneumatic system
Each of these systems is critical to the safety and operation of an aircraft and must abide by strict requirements prior to flight.
Avionics and Electrical System Issues
Advanced avionics power most modern aircraft, supporting navigation, communication, flight management, and monitoring systems. If important avionics equipment is rendered not flight worthy, the aircraft may not be alllowed to legally or safely operate.
Some avionics-related issues include:
- Flight management system (FMS) faults
- Navigation equipment failures
- Communication system problems
- Display or instrument malfunctions
- Required software configuration issues
Often, these situations require troubleshooting, repairs, testing, and/or software updates before the aircraft is permitted to fly.
Unexpected Maintenance Discoveries
Regular inspections are made specifically to find wear and damage before they turn into safety concerns. That said, sometimes scheduled maintenance will uncover unexpected problems that require immediate attention.
Some common maintenance discoveries are:
- Cracks
- Corrosion
- Faulty wiring
- Excessive component wear
- Leaking fluid
If the results of an inspection go beyond the limits established by the aircraft manufacturer or aviation regulations, the aircraft must be AOG until the remedial repairs have been completed and documented.
Availability of Replacement Parts
An AOG event could go on for longer than expected when the required replacement part is not available or delayed. Even in cases when the root of the problem is clear, maintenance teams cannot get repairs done without the correct certified component.
Causes of extended AOG downtime include:
- Aircraft parts on backorder
- Inventory limitations
- Shipping delays
- International customs delays
- Obsolete or tough-to-source components
When aiming to get an aircraft back in business, fast AOG services that supply dependable, certified parts along with effective aviation logistics can minimize operational disruptions.
Fast AOG Support: Why it Matters
Every moment an aircraft remains AOG can lead to an increase in operational costs, disrupted flight schedules, and passengers or cargo operations being affected. Therefore, airlines and aircraft operators look for experienced maintenance providers, certified aircraft parts suppliers, and efficient logistics networks to remedy AOG events as quickly as possible.
Great AOG support will include:
- Rapid parts sourcing
- 24/7 logistics coordination
- Certified replacement components
- Experienced maintenance technicians
- Strong supplier and distribution networks
Final Thoughts
Mechanical failures, avionics malfunctions, unexpected maintenance findings, and delays in sourcing replacement parts can all cause an AOG situation. While some AOG events are can’t be avoided, proactive maintenance programs, smart parts sourcing, and excellent AOG support services can go a long way in reducing aircraft downtime.
Come check out our dependable, user-friendly parts marketplace with 24/7 AOG services at Flyparts.com, and let us help you get back in the air in no time!