Die Multifunktionale Bodenplatte wird in einen Rettungshubschrauber geschoben.

Part-21 Development operations

DRF Maintenance not only stands for maintenance, but also for innovative developments and modifications. With over 15 years of active experience as a Part-21J and G organisation, we have developed over 1700 modifications in all technical areas. From avionics and structure to special mission equipment – we optimise your aircraft and also can validate our EASA STC in the FAA area. Good to know: Many components come from our in-house Part 21G manufacturing facility.

Selection of existing modifications

We develop efficient modifications for various aircraft that can sustainably optimise safety and operation. See for yourself.

  • Pulsing Lights (H145 + EC135)

    A sophisticated visual recognition system consisting of 8 powerful LED lights sustainably improves the helicopter's visibility on the ground and in the air. An interface to TAS and FLARM are optionally available.

    Total system weight ~ 2 kg
    Helicopter downtime ~ 4-6 weeks
    Working hours ~ 350 MH
    ROM On request
    Type of Modification Minor Change 

    A red and white rescue helicopter stands on a landing pad at night with pulsing lights switched on

  • Multifunction Ground Plate (MEG) EC145 und H145

    Our MEG floor plate is fixed to the helicopter floor and enables the safe and protected transport of transport containers weighing up to 300 kg. It is ideal for EPI shuttles or incubators, for example.

    Total system weight 50 kg
    Helicopter downtime ~ 15 min
    Personnel required for installation  2 persons without additional qualification
    ROM On request
    Type of Modification STC

    Close-up: Two hands loading the multifunctional base plate

  • LPV Approach System (EC135)

    The LPV Approach System is a GPS-supported approach system that enables official approach procedures at airports.The system makes approaches easier and safer and can be installed as part of an avionics update, for example.

    Total system weight few kg*
    Helicopter downtime ~ 4 weeks*
    Working hours ~ 300 MH*
    ROM On request*
    Type of Modification STC*

    * Data including installation of avionics hardware

  • Light Weight Flight (Data & Voice) Recorder H135

    This recorder is mandatory for turbine-powered helicopters built 09/22 or later with an MCTOM between 2.250kg and 3.175kg.The SferiRec 100 hardware from Hensoldt is installed directly in the cockpit and is optionally available with a cockpit camera.

    Total system weight ~ 1,4 kg
    Installation time helicopter ~ 125 MH
    Personnel required 1-2 persons Avionics
    ROM On request
    Type of Modification STC

  • NVIS Certification for Airbus Helicopters

    Do you want to equip your crew with night vision goggles or are you planning to change manufacturers? Our team will help you with certification and beyond. Do you already have certified NVIS OPS? Then we recommend our NVG shop.

    A helmet with mounted night vision goggles lies on a trolley and is held by a person.

A DRF Luftrettung crew member loads a stretcher into a rescue helicopter.

Development of new modifications

Do you have your own ideas and plans for modifications? Wonderful. We create customised modifications - regardless of the helicopter type. Book a non-binding consultation with our team. Together we will find the right, customised solution for your individual requirements.

Fancy an improvement? Please contact us.

We will be happy to answer any questions you may have about possible modifications to your machines.
Florian Masserer
Florian Masserer

Senior Sales Executive New Sales

+49 (0)711 7007 3208