FAQ n.21889

Am I eligible to apply for an STC, Major Change or Minor/Major Change to STC?

Answer

Major Change approvals can only be applied for by the Type Certificate holder.

For minor or major changes to an existing STC only the STC holder is eligible to apply (EASA FO.CERT.00031 and FO.CERT.00032).
Alternatively, you may apply for your own STC using EASA form FO.CERT.00033 but need to demonstrate part 21 eligibility i.e. be a Design Organisation Approval holder if you are an EASA Member State applicant. Alternatively, you may contact a DOA of your choice.
Part 21.A.14(c) provides the possibility for any natural person to apply for an STC on an ELA 1 aircraft by demonstrating capability through a certification programme. Alternative procedures are not necessary. ELA 1 is generally defined as aircraft with a max MTOW of 1200kg or less, including balloons up to 3400m^3 and sailplanes.

ELA1
ELA1 aircraft’ means the following manned European Light Aircraft:
ELA2
ELA2 aircraft’ means the following manned European Light Aircraft:

an aeroplane with a Maximum Take-off Mass (MTOM) of 1 200 kg or less that is not classified as complex motor-powered aircraft

an aeroplane with a Maximum Take-off Mass (MTOM) of 2 000 kg or less that is not classified as complex motor-powered aircraft

a sailplane or powered sailplane of 1 200 kg MTOM or less

a sailplane or powered sailplane of 2 000 kg MTOM or less

a balloon with a maximum design lifting gas or hot air volume of not more than 3 400 m 3 for hot air balloons, 1 050 m 3 for gas balloons, 300 m 3 for tethered gas balloons

a balloon

an airship designed for not more than 4 occupants and a maximum design lifting gas or hot air volume of not more than 3 400 m 3 for hot air airships and 1 000 m 3 for gas airships6

a hot air airship

 

a gas airship complying with all of the following characteristics: 

- 3% maximum static heaviness

- Non-vectored thrust (except reverse thrust)

- Conventional and simple design of: structure, control system and ballonet system

- Non-power assisted controls

 

a Very Light Rotorcraft

 

Certification Programme
Demonstration of capability via a certification programme for:
AP DOA
Demonstration of capability via AP DOA for:

ELA1 aircraft

ELA2 aircraft

Engine [to be] installed in ELA1 aircraft

Engine [to be] installed in ELA2 aircraft

Propeller [to be] installed in ELA1 aircraft

Propeller [to be] installed in ELA2 aircraft

Piston Engine

Fixed or adjustable pitch propeller 

Non-EU applicants do not need to demonstrate part 21 eligibility if a Bilateral Agreement/Working Arrangement is in force. 

For further information on Design Organisation Approval (DOA) and Alternative Procedure for Design Organisation Approval (AP DOA), please refer to the following FAQs.

 

 

Last updated: 
16/11/2017

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