+44 (1223) 979580 office@harkwood.co.uk Cambridge, UK
INSTALLATION
The physical installation is the same for all aircraft. The regulatory route depends on how your aircraft is registered. Select your aircraft type below to see the relevant requirements.
MOUNTING OPTIONS
Direct panel mount
Fitted directly into a circular panel cutout. Dimensions and tolerances on the support page.
Circular instrument cutout
Adapters for standard circular instrument panel cutouts. Avoids the need for a cutout in an existing panel.
Version 2 replacement adapter
Specific adapter for replacing an existing version 2 charger unit. Reuses the existing cutout and mounting points.
SELECT YOUR AIRCRAFT TYPE
Not sure which applies? If your aircraft has a UK or EASA Certificate of Airworthiness, it follows the EASA/CAA route. If it operates on a Permit to Fly issued by the LAA or BMAA, it follows the LAA/BMAA route. Microlights registered with the BMAA also follow their own route.
Type-certificated aircraft
Certificate of Airworthiness
Aircraft maintained to an approved type design, including most production aircraft. Regulatory requirements vary by country and registration authority.
UK: CAA (CS-STAN applies)
EU: EASA (CS-STAN applies)
USA: FAA-registered under Part 43
e.g., Cessna, Piper, Robin, Diamond, Cirrus
Experimental, permit, and light sport aircraft
Permit to Fly / Experimental / LSA
Aircraft operating outside type certification, including homebuilts, kit aircraft, microlights, and light sport aircraft. Typically owner-managed modifications within permit conditions.
UK: LAA, BMAA
EU: National aviation authority (varies by country)
USA: FAA Experimental / LSA
e.g., Van’s RV series, Kitfox, Rans, Rotax-powered, microlights
The regulatory requirements vary by country. We have documented the UK and EASA routes below. If you are from outside the UK or EU, the physical installation is identical — contact your local aviation authority for guidance on the applicable regulatory route.
Certificate of Airworthiness Permit to Fly / Experimental / LSA
REGULATORY ROUTE — EASA / CAA
Our chargers can be permanently installed in EASA and UK CAA registered aircraft under CS-STAN Issue 4, without a Form 1 or modification approval. Two CS-STAN standards apply. The difference is the per-port power limit.
CS-SC038b
DC-to-DC converters for avionics and pilot devices
Covers installation of DC-to-DC converters to support avionics installations, equipment requiring a controlled voltage supply, and pilot devices. No per-port power restriction under this route.
CS-SC102b
DC power supply for portable electronic devices
Covers DC power supply systems connecting aircraft electrical power to portable electronic devices (PEDs). Per-port limit: 20 W.
Dual-port units can be configured to 20 W per port via software.
Which to use? CS-SC038b has no power limit and is the more straightforward route if your engineer is comfortable with it. CS-SC102b is specifically written for PED charging, so some engineers prefer it for that reason, despite the 20 W limit. Either is valid. Discuss with your LAE or authorised person.
Form 123 required for both routes. A Form 123 (release document) must be generated for any CS-STAN installation. A sample Form 123 for this installation is available to download.
REGULATORY REFERENCES
UK CAP 1419 / ORS9
The CAA adopted CS-STAN Issue 4 via ORS9 (Decision No. 36, 20 December 2023). Applies to UK-registered aircraft under CAP 1419.
REGULATORY ROUTE — LAA / BMAA
CS-STAN does not apply to LAA or BMAA permit aircraft. Modifications to permit aircraft are managed under the terms of the permit and the relevant organisation’s technical guidance. The physical installation is identical, what differs is the paperwork and sign-off process.
For LAA permit aircraft, modifications are carried out under LAA Engineering Information Leaflet (EIL) guidance and require sign-off by an LAA Inspector. For BMAA permit aircraft, the BMAA’s own technical procedures apply. In both cases, installing a powered accessory is typically a straightforward minor modification.
LAA permit aircraft
Modification should be recorded in the aircraft’s technical log. Sign-off by an LAA Inspector is required. Contact the LAA Engineering department if you are unsure of the correct procedure for your aircraft type.
BMAA permit aircraft
Follow BMAA technical procedures for additions to the aircraft’s electrical system. Contact the BMAA technical office for guidance specific to your aircraft type.
If you are in any doubt about the correct sign-off process for your aircraft, contact your LAA or BMAA inspector before beginning work.
INSTALLATION INSTRUCTIONS
All installations can follow the same instructions, which may be downloaded from the link here. {insert link to installation instructions}