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DAT.TR.100 Working methods and operating procedures

SPECIFIC REQUIREMENTS FOR PROVIDERS OF DATA SERVICES · Regulation (EU) 2017/373 · EAR revision 12 Mar 2025

IRImplementing rule

DAT.TR.100Working methods and operating procedures

The DAT provider shall:

(a)with regard to all the necessary aeronautical data:

(1)establish DQRs that are agreed upon with the other DAT provider and in the case of a type 2 DAT provider, with the equipment design approval holder or an applicant for an approval of that specific design, to determine the compatibility of these DQRs with the intended use;

(2)use data from an authoritative source(s) and, if required, other aeronautical data verified and validated by the DAT provider itself and/or by other DAT provider(s);

(3)establish a procedure to ensure that the data is correctly processed;

(4)establish and implement processes to ensure that the tailored data provided or requested by an aircraft operator or other DAT provider shall only be distributed to the requester itself; and

(b)with regard to attesting staff that sign the statements of conformity issued under DAT.OR.105(b) ensure that:

(1)the knowledge, background (including other functions in the organisation), and experience of the attesting staff are appropriate to their allocated responsibilities;

(2)it maintains records of all attesting staff which include details of the scope of their authorisation;

(3)attesting staff are provided with evidence of the scope of their authorisation.

IR · DAT.TR.100 — Regulation (EU) 2017/373 · ED Decision 2017/001/R · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

AMCAcceptable means of compliance

AMC1 DAT.TR.100(a)(1)Working methods and operating procedures

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COMPATIBILITY WITH CERTIFIED AIRCRAFT APPLICATION/EQUIPMENT — TYPE 2 DAT PROVIDER A Type 2 DAT provider should perform tests to ensure that the database works as intended with the application by performing sampling checks on individual data sets (e.g. in a simulation/test bench environment).

AMC · AMC1 DAT.TR.100(a)(1) — Regulation (EU) 2017/373 · ED Decision 2017/001/R · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

AMCAcceptable means of compliance

AMC1 DAT.TR.100(a)(2)Working methods and operating procedures

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DATA SOURCE In reference to the ‘data source’, please refer to AMC1 DAT.OR.100(a) ‘Aeronautical data and information’.

AMC · AMC1 DAT.TR.100(a)(2) — Regulation (EU) 2017/373 · ED Decision 2017/001/R · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

GMGuidance material

GM1 DAT.TR.100(a)(2)Working methods and operating procedures

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DATA EXCHANGE To support data integrity, the DAT provider may use digital data sets as a preferred means of data exchange.

GM · GM1 DAT.TR.100(a)(2) — Regulation (EU) 2017/373 · ED Decision 2017/001/R · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

AMCAcceptable means of compliance

AMC1 DAT.TR.100(a)(3)Working methods and operating procedures

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DATA PROCESSING The DAT provider should keep the records for a period of at least 3 years after the end of the validity period of the database unless otherwise specified by other applicable requirements.

AMC · AMC1 DAT.TR.100(a)(3) — Regulation (EU) 2017/373 · ED Decision 2017/001/R · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

GMGuidance material

GM1 DAT.TR.100(b)Working methods and operating procedures

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SIGNATURE The attesting staff, authorised by the DAT provider, may sign the statements issued in accordance with DAT.OR.105(b) manually or in a digital manner (e.g. digital signature).

GM · GM1 DAT.TR.100(b) — Regulation (EU) 2017/373 · ED Decision 2017/001/R · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

AMCAcceptable means of compliance

AMC1 DAT.TR.100(b)(1)Working methods and operating procedures

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ATTESTING STAFF

(a)To qualify as attesting staff, appropriate knowledge, background, experience and specific training or assessment established by the DAT provider should be required.

(b)Training should be provided to develop a satisfactory level of knowledge of organisational procedures, processes and products, aviation law, and associated IRs, AMC and GM, relevant to the particular role.

(c)In addition to the general training policy, the DAT provider should define its own standards for training, including qualification standards, for personnel to be identified as attesting staff.

(d)The training should be updated in response to experience gained and technological advancements.

AMC · AMC1 DAT.TR.100(b)(1) — Regulation (EU) 2017/373 · ED Decision 2017/001/R · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

AMCAcceptable means of compliance

AMC1 DAT.TR.100(b)(2)Working methods and operating procedures

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RECORDS OF ATTESTING STAFF

(a)The following is the minimum information that should be recorded by the DAT provider in respect of each attesting staff member:

(1)name;

(2)general training and standard attained;

(3)specific training and standard attained;

(4)continuation training, if appropriate;

(5)background experience;

(6)scope of the authorisation; and

(7)date of first issue of the authorisation.

(b)The record should be kept in an appropriate format and should be controlled through an internal procedure of the organisation. This procedure could be part of the management system.

(c)The DAT provider should ensure that the number of persons authorised to access the system of personnel data record-keeping is limited and an appropriate access control mechanism is in place.

(d)The attesting staff member should be given access, upon request, to his or her own records.

(e)The DAT provider should keep the record for at least two years after the attesting staff member has ceased employment with the organisation or the withdrawal of the authorisation, whichever occurs first.

AMC · AMC1 DAT.TR.100(b)(2) — Regulation (EU) 2017/373 · ED Decision 2017/001/R · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

GMGuidance material

GM1 DAT.TR.100(b)(2)Working methods and operating procedures

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RECORDS OF ATTESTING STAFF Records of the attesting staff may be stored electronically.

GM · GM1 DAT.TR.100(b)(2) — Regulation (EU) 2017/373 · ED Decision 2017/001/R · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

AMCAcceptable means of compliance

AMC1 DAT.TR.100(b)(3)Working methods and operating procedures

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EVIDENCE OF THE SCOPE OF THE ATTESTING STAFF AUTHORISATION

(a)The authorisation document should clearly indicate the scope of the authorisation to allow attesting staff and any other authorised persons to verify the privileges.

(b)Attesting staff should make the authorisation document available to the competent authority upon request.

AMC · AMC1 DAT.TR.100(b)(3) — Regulation (EU) 2017/373 · ED Decision 2017/001/R · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

All rules in SUBPART B — TECHNICAL REQUIREMENTS FOR PROVIDERS OF DATA SERVICES (DAT.TR)

Consolidated from the EASA Easy Access Rules (revision 12 Mar 2025, extracted 17 Aug 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.

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