Core Competence

Our core competence lies in Design, Development and Manufacture of engineering products for aerospace, defence, automobile and allied sectors. STPL has a skillful and experienced teams of domain experts, engineers and technicians as well as qualified and experienced executives. Our project teams are capable of starting from scratch specifications and deliver what our customer wants and support it for the entire product life cycle.

Endless Capabilities-Supporting Mobility with Passion

Design and Development

We have the domain expertise necessary for product conceptualization, finalization of specifications, engineering, assembly, testing and validation. All members of our design team are graduate engineers with superior design skills and passion to innovate. Our two decades of experience in design and development of engineering products has today placed us at much higher pedestal.

Our core expertise lies in :

  • Electrical and Electronic Engineering
  • Re-Engineering and Obsolescence Management
  • Digital Signal Processing
  • Microcontrollers
  • Computer Aided Design
  • Aviation Ground Support Equipment

We employ a host of computer software like AutoDesk, Catia, SoildWorks, Rapid Harness, Proteus, NI MultiSim etc for our CAD activities.

Domain Strength

STPL has vast experience and domain knowledge in design and development of :

  • Test Equipment
  • ATEs
  • Electrical Harnesses
  • Electrical Equipment
  • Line Replaceable Units.

In the year 2018, STPL ventured into mechanical ground support equipment (GSE) in partnership with Vassmaan Engineering Private Limited, Chennai. One of the major projects we have initiated is ‘Indian Towbarless Tug’ for aircraft towing operations. This product is planned to be launched in March 2020.

Product Life Cycle Management

STPL ensures life cycle management of its products right from conceptualization and realization of prototypes till obsolescence management. Maintenance Repair Operations (MRO) and System Upgrades are planned, where required at the inception stage itself. We ensure that our customer enjoys our products with least downtime, throughout its life span.

Ground Support Equipment under development by STPL are;

  • Indian Towbarless Tug
  • Scissor Ladder for aircraft maintenance
  • Universal Cockpit ladder for fighter aircraft
  • Universal Towbar
  • Drop tank trolley

Cable Harness

STPL has a organically grown cable harness facility from conceptualization stage to mass manufacture. The superior skillsets and experience of out cable harness team gives us the freedom to manufacture cable assemblies and wire harness assemblies to meet the specific requirements of our customers. Our cable harness products range  include:

  • Single branch cable assemblies
  • Complex harness assemblies with multiple branching, running up to 15 meters in length
  • Built-To-Print manufacturing, selection and sourcing of connectors, adaptors, cable accessories.
  • BS-4 compatible cable harnesses for automobile. 

All our key members of the cable harness team are IPC certified and are proficient in operation of various tools & test equipment for manufacturing of cable and wire looming assemblies.

STPL helps reduce project timelines through efficient customization


At STPL, quality consciousness starts at the grassroots and encompasses every single process we use in our business operations. Our quality consciousness is well enshrined in our mission statement viz; ‘To enhance our business competitiveness through World-class quality, On-time delivery and cost-effective products.’

Our Quality Management System has been certified to meet the requirements of AS 9100D and ISO 9001-2015 standards. Directorate General of Aerospace Quality Assurance (DGAQA) has also endorsed our QMS for indigenisation of test equipment, cable harnesses and LRU. One of ways we earn our daily bread is by spreading the quality consciousness amongst our employees and continually improving the effectiveness of our QMS.


We are certified members of multiple bodies which give us pride of best part of aerospace community and boosts our confidence in achieving the excellence.

All the products manufactured by STPL are qualified to some of the very stringent standards such as; MIL STD 810 F, MIL STD 883 D, MIL STD 461 E, MIL STD 462 D, MIL STD 704 D, MIL STD 2164 (EC), TNAM 6150, BS 3G 100, RTCA DO 178B, RTCA DO 254, RTCA DO 160E, JSS55555.

Services in action

  • All

Alongside, we also take up Repair and Calibration, Painting of Aircrafts and AMC of Ground Support Equipments.