ANNEX I U.K. PART 21 Certification of aircraft and related products, parts and appliances, and of design and production organisations

SECTION A U.K. TECHNICAL REQUIREMENTS

SUBPART A — GENERAL PROVISIONS U.K.

21.A.3B Airworthiness directives U.K.

(a) An airworthiness directive means a document issued or adopted by the [F1 CAA] which mandates actions to be performed on an aircraft to restore an acceptable level of safety, when evidence shows that the safety level of this aircraft may otherwise be compromised. U.K.

Textual Amendments

F1 Word in Annex 1 point 21.A.3B(a) substituted (31.12.2020) by The Aviation Safety (Amendment etc.) (EU Exit) Regulations 2019 (S.I. 2019/645), regs. 1, 195(3)(a) (with Sch. 3) (as amended by S.I. 2019/1098, regs. 1(3), 12); 2020 c. 1, Sch. 5 para. 1(1)

(b) The [F2 CAA] shall issue an airworthiness directive when: U.K.

1.

an unsafe condition has been determined by the [F2 CAA] to exist in an aircraft, as a result of a deficiency in the aircraft, or an engine, propeller, part or appliance installed on this aircraft; and

2.

that condition is likely to exist or develop in other aircraft.

Textual Amendments

F2 Word in Annex 1 point 21.A.3B(b) substituted (31.12.2020) by The Aviation Safety (Amendment etc.) (EU Exit) Regulations 2019 (S.I. 2019/645), regs. 1, 195(3)(b) (with Sch. 3) (as amended by S.I. 2019/1098, regs. 1(3), 12); 2020 c. 1, Sch. 5 para. 1(1)

(c) When an airworthiness directive has to be issued by the [F3 CAA] to correct the unsafe condition referred to in point (b), or to require the performance of an inspection, the holder of the type-certificate, restricted type-certificate, supplemental type-certificate, major repair design approval, [F4 UKTSO] authorisation or any other relevant approval deemed to have been issued under this Regulation, shall: U.K.

1.

propose the appropriate corrective action or required inspections, or both, and submit details of these proposals to the [F5 CAA] for approval;

2.

following the approval by the [F5 CAA] of the proposals referred to under point (1), make available to all known operators or owners of the product, part or appliance and, on request, to any person required to comply with the airworthiness directive, appropriate descriptive data and accomplishment instructions.

Textual Amendments

F5 Word in Annex 1 point 21.A.3B(c) substituted (31.12.2020) by The Aviation Safety (Amendment etc.) (EU Exit) Regulations 2019 (S.I. 2019/645), regs. 1, 195(3)(c)(iii) (with Sch. 3) (as amended by S.I. 2019/1098, regs. 1(3), 12); 2020 c. 1, Sch. 5 para. 1(1)

Textual Amendments

F3 Word in Annex 1 point 21.A.3B(c) substituted (31.12.2020) by The Aviation Safety (Amendment etc.) (EU Exit) Regulations 2019 (S.I. 2019/645), regs. 1, 195(3)(c)(i) (with Sch. 3) (as amended by S.I. 2019/1098, regs. 1(3), 12); 2020 c. 1, Sch. 5 para. 1(1)

F4 Word in Annex 1 point 21.A.3B(c) substituted (31.12.2020) by The Aviation Safety (Amendment etc.) (EU Exit) Regulations 2019 (S.I. 2019/645), regs. 1, 195(3)(c)(ii) (with Sch. 3) (as amended by S.I. 2019/1098, regs. 1(3), 12); 2020 c. 1, Sch. 5 para. 1(1)

(d) An airworthiness directive shall contain at least the following information: U.K.

1.

an identification of the unsafe condition;

2.

an identification of the affected aircraft;

3.

the action(s) required;

4.

the compliance time for the required action(s);

5.

the date of entry into force.