Page 159 - UK Regulation Part 21 Initial Airworthiness Annex I (consolidated) March 2022

PART 21 - INITIAL AIRWORTHINESS (ANNEX I)

system should be considered to be ‘significant’ to the demonstration of compliance or to the
airworthiness, operational suitability or environmental protection of the products:
1. Organisation
- Relocation to new premises (see also GM 21.A.249);
- Change in the industrial organisation (partnership, suppliers, design work sharing),
unless it can be shown that the independent checking function of the demonstration
of compliance is not affected;
- Change in the parts of the organisation that contribute directly to the airworthiness,
operational suitability or environmental protection (independent checking function,
office of airworthiness (or equivalent));
- Change to the independent monitoring principles (see 21.A.239(a)(3)).
2. Responsibilities
- Change of the management staff;
- the Head of the design organisation (GM No 1 to 21.A.239(a), para.3.1.2; GM
No 1 to 21.A.245, para.4.1; GM 21.A.265(b));
- the Chief of the Office of Airworthiness (GM No 1 to 21.A.245, para. 4.2);
- the Chief of the independent monitoring function of the design assurance
system (21.A.239(a)(3) and AMC No 1 to 21.A.243(a), para.2).
- New distribution of responsibilities affecting airworthiness, operational suitability or
environmental protection;
- For organisations that design minor changes to type design or minor repairs to
products, change of the persons identified in GM No 2 to 21.A.243(d).
3. Procedures
Change to the principles of procedures related to:
- the type certification;
- the classification of changes and repairs as ‘major’ or ‘minor’ (21.A.263(c)(1));
- the treatment of major changes and major repairs;
- the approval of the design of minor changes and minor repairs (21.A.263(c)(2));
- the approval of the design of certain major repairs (21.A.435(b) or 21.A.263(c)(5));
- the approval of the conditions under which a permit to fly can be issued (21.A.263(c)
(6));
- the issue of a permit to fly (21.A.263(c)(7));
- the approval of certain major changes to a type certificate (21.A.263(c)(8));
- the approval of certain supplemental type certificates (21.A.263(c)(9));
- the approval of certain major changes to certain supplemental type certificates;
(21.A.263(c)(9));
- continued airworthiness or continued operational suitability (see 21.A.3);
- the configuration control, when airworthiness, operational suitability or
environmental protection is affected;
- the acceptability of design tasks undertaken by partners or subcontractors
(21.A.239(c));
- the issue of data and information under the obligation of 21.A.265(h).
4. Resources
- A substantial reduction in the number and/or experience of staff (see 21.A.245(a)).
21.A.247 GM1-ELA Changes in design assurance system
The following changes are considered to be significant:
1. Changes in ownership:
- relocation of the major place of activity to a different geographic location, city, airfield
or similar. Relocation within one building, or to a neighbouring building on the same
premises, or a similar move, does not require prior approval, as long as there is no
negative effect on the interface with or the access to the related production
organisation;
2. Changes in the scope of approval.
3. Changes in the nomination of, or the allocation of responsibilities to, the HDO, the HoA, or
the ISM; or
4. Changes in the parts of the organisation that contribute directly to the airworthiness,
operational suitability or environmental protection functions, such as changes to the
principles or to the procedures related to:
- type certification;
- the classification of changes and repairs as ‘major’ or ‘minor’;
- the handling of major changes and major repairs;
- the approval of the design of minor changes and minor repairs;
- the issue of information and instructions under the DOA privileges;
- the approval of minor revisions to the aircraft flight manual;
- the approval of the designs of major repairs;
- continued airworthiness or continued operational suitability; or
- configuration control if airworthiness, operational suitability or environmental
protection is affected.
March 2022 159 of 260