Airframe Maintenance & Aircraft Modification

A Global Reputation for Quality, Capability, and Service Delivery



Airframe Maintenance & Aircraft Modification

Our U.S. facilities account for approximately 20% of the airframe maintenance manhours produced by ST Engineering annually, primarily from long-standing partnerships with customers that represent some of the largest passenger and cargo airlines

We are one of of the largest providers of commercial airframe maintenance in North America, with facilities at the following airport locations:

  • San Antonio International Airport – San Antonio, Texas
  • Mobile Aeroplex at Brookley – Mobile, Alabama
  • Pensacola international Airport – Pensacola, Florida

In addition to MRO, we also carry out freighter conversion work at our San Antonio facility.

Base Maintenance

Our US-based airframe facilities are capable of performing all types of scheduled airframe maintenance on most commercial transport-category aircraft:

  • Heavy Maintenance (A, B, C, & D-Checks)
  • Structural Component Repair & Overhaul
  • Service Bulletin (SB) & Airworthiness Directive (AD) Compliance
  • Overnight Checks
  • On-call Line Maintenance Support

In addition, we support our customers with field trips and drop-in repairs for unscheduled events.

Aircraft Modifications

Whether part of scheduled maintenance visits, or dedicated modification lines, our facilities have the ability and experience to support all types of commercial aircraft modifications:

  • Complete Interior Retrofit & Reconfiguration
  • Avionics Upgrades & Installations, including Wi-Fi & IFE
  • Structural Modifications
  • Winglet Installations
  • Passenger-to-Freighter (PTF) & Combi Conversions

Freighter Conversions

With a long history of performing passenger-to-freighter conversions on DC-10s, 727s, 747s and 757s, our US facilities continue to build on that legacy and experience by supporting the A320, A321 and A330 P2F programs from EFW, ST Engineering’s joint venture with Airbus.

10 Lines of Business

10 Lines of Business in Commercial Aerospace

Headquartered in Singapore

Started in the US in 1991

Started operations in the US in 1991

9,000 Employees Globally

9,000 Employees Globally in Commercial Aerospace;
around 3,000 in the US


San Antonio Aerospace

9800 John Saunders Road
San Antonio, TX 78216, USA
(210) 293-3200
icon - fax (210) 293-3680

Mobile Aerospace Engineering

2100 Aerospace Drive, Mobile Aeroplex at Brookley
Mobile, Alabama 36615, USA
(251) 438-8888
(251) 438-8892

Middle River Aerostructures Systems

1103 Chesapeake Park Plaza
Baltimore, Maryland 21220, USA
(410) 682-1500
(410) 682-1230


100 Great Meadow Road, Suite 202
Wethersfield, CT 06109, USA
(855) 432-6769
(860) 466-4899