Aircraft on ground (AOG) / Global Emergency Maintenance (GEM)


We understand that unplanned maintenance needs can be costly and inconvenient. Rather than have inoperable aircraft, let our Global Emergency Maintenance team — available 24/7/365 — come to you. We'll have you back in the air in no time at all. Our capabilities include:

  • Borescope inspections
  • Fuel-tank entry
  • Technical support across all ATA chapters
  • Structural and composite repairs
  • Chronic system repair
  • Flight control replacement
  • Non-routine defect rectification
  • Engine repairs

GEM Login

Customers with a GEM can view the current status of their aircraft. Please ask your United Technical Operations Representative to provide you with a GEM ID and password.


Agency approval

  • CAAC
  • CAAS
  • CASA
  • DAC
  • DGCA
  • EASA
  • FAA
  • GCAA
  • JCAB
  • MOLIT
  • NCAA
  • QCAA

Approvals vary by location


Helpful links

Line maintenance information