The Overhaul Division has to its credit a sound infrastructure to cater to the customer's needs ranging from maintenance of Piston Engine Aircraft to the state-of-the-art aircraft like Mirage 2000. From its inception, the Overhaul Division has serviced over 3500 Aircraft of different types.

On 17th March 1998 an agreement was concluded between Hindustan Aeronautics Limited and Dassault Aviation authorizing HAL to offer its Mirage 2000 major inspection facilities to global customers.

Currently, it is the only organization authorized to undertake major inspection of Mirage 2000 Aircraft outside France for global customers.

The management of these maintenance activities is through sophisticated computer systems with extensive interaction between the user and the maintenance agency through the electronic medium.

The Mirage 2000 major inspection line is equipped with modern ground support,  ground handling equipment and testers conforming to the specifications of M/s Dassault Aviation. The line is supported by a host of highly skilled technicians and qualified Engineers, trained at M/s Dassault Aviation as well as at other original equipment manufacturers of the various systems.

Logistics management include computer based vertical storage system for kit marshal stores and mobile storage system for spares. Environmental control for LRU storage has been incorporated to meet the advanced technology requirements.

The Overhaul Division is the approved repair agency for carrying out major servicing of Jaguar Aircraft and its accessories. All the three versions namely Strike, Trainer and Maritime undergo major servicing at the Overhaul Division.

The Division also undertakes the compliance of the Company Special Technical Instruction (CSTI), Company Service Instruction (CSI) developed by HAL and compliance of modifications as per Standard Of Preparation (SOP).

Kiran Mk-I / IA, Kiran Mk-II, the Basic, Intermediate Jet and Weapon Trainers, designed, developed and manufactured by HAL are maintained and overhauled by Overhaul Division. Surya Kiran, the formation aerobatic team of the IAF comprising of Kiran Mk II aircraft are also maintained by the Division.

The Division gives a  fresh lease of life to aircraft and piston engines. Other activities where the Division is actively involved are :

•  Repair and overhaul of Piston Engines / Accessories :

The Division has the know-how and expertise to overhaul different types of Radial and in-line Piston Engines. It has repaired and overhauled around 6000 Piston Engines, which include Radial Engines like R985, R1340, R1830, R2000 and in-line Engines like Gypsy Queen, Cirrus Major, Continental and Lycoming Engine variants and their accessories

• Repair / Servicing of rotables pertaining to Sea Harrier aircraft and SeaKing Helicopter

The Overhaul Division has an excellent integrated infrastructure to repair / overhaul sophisticated mechanical, pneumatic and avionic accessories. The importance placed on quality can be gauged by the highly sensitive testing equipment it employs during the repair and overhaul of over 600 types of various systems accessories for Jaguar / Mirage 2000 / AVRO / Alouette / Lama Helicopters.

The Instruments Shop undertakes the repair and overhaul of Instruments of Flight, Engine and Navigation systems.

The Avionics Shop is fully equipped to undertake the servicing and repair of Avionic equipment such as V / UHF, ADF, Radio Altimeter and Weather Radar for different types of aircraft.

The Hydraulic Accessories Shop undertakes the overhaul and repair of Hydraulic system accessories such as Pumps, Accumulators, Anti-skid Units, Undercarriage Jacks, Regulators and Power Flying Control Units.

Stringent quality systems are employed to service and overhaul Oxygen system accessories such as Liquid Oxygen Converters, Regulators, Amplifiers, Gauges and Gaseous Oxygen Cylinders.

Vital safety equipment such as Ejection Seats and its various sub-systems like Parachute Pack, Jettison Jack, PEC, Drogue Gun and Barostatic Time Release Units are serviced and repaired in a separate bay.

The Overhaul Division provides maintenance support to aircraft at various Air Force bases.

In addition to the maintenance of aircraft at Outstation Bases, the Division also undertakes the repair of aircraft, engines, retro-compliance of modifications and snag rectification at the Operating Units on  an ‘as and when’ required basis.

The Overhaul Division supports the fabrication of Ground Handling Equipment for aircraft and helicopters. It also supplies spares for Ground Handling Equipment.

The Overhaul Division supports the other sister Divisions of HAL by providing servicing facilities for Rotables required for different projects executed by them.

• Modification of Fire Control Radar on maritime version of Jaguar Aircraft

• Total Electrical Connector Change (Type 951) on all Jaguar Aircraft

• Mirage Radome Nose Cone painting facility established

• Compliance of Smoke Emission Modification on Kiran Mk II ( Sagar Pawan ) for the Indian Navy

• Compliance of Roshni and SPJ Modification on Navy Sea Harrier Aircraft

The Division is aggressively pursuing indigenisation of components which are critically required for the servicing of aircraft and engines.