MRO / Metal Technology Co. Ltd.

Metal Technology Co. Ltd.


Aviation and Parts repair

Our aerospace business consists of two major processes, manufacturing and repairing of aircraft parts. For manufacturing, we are involved in manufacturing parts for the aerospace, aircraft, and defense industries. This is mainly done at our Shiga and Himeji plants which are Nadcap accredited.

For repair, in 2011, Chiba plant commenced parts repair primarily for the heat treatment of aircraft engine cases and other special processes. Narita plant has been certified as an FAA repair station since 2012, and an EASA Maintenance Organisation since 2013. Our main repairs are for blades and vanes.

Chiba plant has been approved by the Japan Civil Aviation Bureau (JCAB) as an Approved Organization of repairing or remodeling equipment since 2014. Chiba is also a recognized FAA second fixed location and an EASA additional location for Narita plant.



Narita Plant


  • Electric furnace, Vacuum furnace
  • Plasma spray equipment :APPS, LPPS
  • NDT: X ray equipment, FPI (Fluorescent Penetrant Inspection), UT (Ultrasonic Testing)
  • FIC (Fluoride Ionized Cleaning)
  • Shot peening
  • Laser drilling
  • Electrical Discharge Machining, etc.

*APPS: Atmospheric Pressure Plasma Spraying & LPPS: Low Pressure Plasma Spraying

Narita Plant1
Narita Plant2
Narita Plant3


  • FAA Repair Station Approval
    Rating : Engines
    Capability : P&W JT8D/ V2500
  • EASA Maintenance Organisation Approval
    Rating : Engine and APU Non Destructive Testing
    Capability: P&W JT8D V2500 PT RT UT

※PT: Penetrant testing, RT: Radiographic Testing, UT: Ultrasonic Testing, APU: Auxiliary Power Unit

Contract with Engine manufacturer

Narita plant entered in to a DSP (Designated Service Provider) contract for JT8D engine with Pratt & Whitney.

Pratt & Whitney global service partner is a comprehensive service provider for engines manufactured by Pratt & Whitney. Pratt & Whitney is a member company of United Technologies Corp group, and a world leader in the design, manufacture and service of aircraft engines, and auxiliary power unit. United Technologies Corp is an world leading company, headquartered in Farmington, Connecticut, serving high technology products for commercial aerospace, defense and building industries.

Chiba Plant

  • Electric furnace, Vacuum furnace
  • Plasma spray equipment :APPS
  • NDT: X ray equipment, FPI (Fluorescent Penetrant Inspection),
  • Vertical Lathe
  • Horizontal boring machine
  • Shot peening
  • 4 steps alkaline cleaning
  • Blasting machine
  • Water Jet machine

*APPS: Atmospheric Pressure Plasma Spraying
LPPS: Low Pressure Plasma Spraying


Japan Civil Aviation Bureau(JCAB)Certification Number:209

Capability:Capability of repairing and remodeling parts

ScopeTurbine engine

Capability:Types and models of parts, Pratt & Whitney PW4000 type

Certified itemsLPT Disk, Turbine Exhaust Case

Chiba plant is also certified for JIS Q 9100; Quality management system, requirements for organization involved in aircraft, aerospace, and defense related industries.

History & Topics

Feb 2011

Chiba plant was established and started operation

Nov 2011

Chiba plant was certified for JIS Q 9100

Sep 2012

Narita plant was established and started operation

Oct 2012

Narita plant was certified for FAA repair station

June 2013

Narita plant was certified for EASA Maintenance Organisation

Dec 2014

Chiba plant was approved by JCAB Approved Organization

Outstanding heat treatment technology applied to the aviation and nuclear power industries

Heat Treatment
Heat Treatment
We provide heat treatment using our superior knowledge, adhering to strict quality management controls, and maintaining equipment to a high standard.
Compact electron beam irradiation device

Contact Us



Any request about products, and ask for quotation can be made here. Other questions and requests about the company can also be made here.

Document download

  • Company information
  • Technology information (Japanese)
  • Technology information (English)
  • HIP unit list
  • Possible material combinations for brazing
  • Capability List
  • FAA Capability List
  • AM overview slides
  • MICROTRON Test Machine MIC1
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