What is the difference between differences training and familiarisation in terms of the level of knowledge required?

Differences training requires additional knowledge of and training on the aircraft or an appropriate training device, while familiarisation requires only the acquisition of additional knowledge.

When is familiarisation required for pilots according to AMC1 ORO.FC.125?

Familiarisation is required when operating another aircraft of the same type.

For helicopters, what triggers the need for differences training?

Differences training for helicopters is required when operating a variant of a helicopter currently operated.

In the case of VCA (other than helicopters), when must differences training be carried out?

For VCA, differences training must be carried out when operating a variant of a VCA different from the VCA currently operated.

Does differences training for aeroplanes apply when moving to a different type within the same class?

Yes, for aeroplanes, differences training applies when operating another type of the same class currently operated, in addition to another variant of the same type.

What is the regulatory basis for AMC1 ORO.FC.125?

The regulatory basis is ED Decision 2025/010/R.

AMC1 ORO.FC.125 Differences training, familiarisation, equipment and procedure training

Q: For aeroplanes, in which situations must differences training be carried out?

Differences training for aeroplanes must be carried out when operating another variant of an aeroplane of the same type or another type of the same class currently operated.

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AMC1 ORO.FC.125 Differences training, familiarisation, equipment and procedure training

ED Decision 2025/010/R

GENERAL

(a) Differences training requires additional knowledge of and training on the aircraft or an appropriate training device. It should be carried out:

(1) in the case of aeroplanes, when operating another variant of an aeroplane of the same type or another type of the same class currently operated;

(2) in the case of helicopters, when operating a variant of a helicopter currently operated;

(3) in the case of VCA, when operating a variant of a VCA different from the VCA currently operated.

(b) Familiarisation requires only the acquisition of additional knowledge. It should be carried out when operating another aircraft of the same type.

Details

Source-Title: AMC1 ORO.FC.125 Differences training, familiarisation, equipment and procedure training View latest amendments

Erulesid: ERULES-1963177438-12208 Compare versions

Domain: Air operations

Applicabilitydate: 9 July, 2025

Entryintoforcedate: 9 July, 2025

Regulatorysource: ED Decision 2025/010/R Navigate

Regulatorysubject: Part-ORO

Typeofcontent: AMC to IR (Acceptable means of compliance to implementing rule)

Parentir: ORO.FC.125 Differences training, familiarisation, equipment and procedure training

Origin: EASA

Category: EAR