Airworthiness Directive

Question 1

What is an AD?

Answer 1

A document which mandates actions to be performed on an a/c to restore an acceptable level of safety

Question 2

Who issues an AD?

Answer 2

CAA

Question 3

When is an AD issued? (2)

Answer 3

• unsafe condition has been determined by CAA to exist as a result of a deficiency in the a/c, engine, propeller, part or appliance installed.
• condition is likely to exist or develop on other a/c

Question 4

What corrective actions must the relevant approval holders (holder of TC, supplemental TC, restricted TC, major repair design org. or UKTSO authorised) perform after the CAA issues an AD? (2)

Answer 4

• propose corrective action or required inspections and submit details of these proposals to CAA for approval
• following CAA approval, the proposals must be made available to all operators or owners of the product, part or appliance and on request anyone required to comply with AD.

Question 5

What must ADs contain? (5)

Answer 5

1) identification of unsafe condition
2) identification of affected a/c
3) actions required
4) compliance time for required actions
5) date of entry into force

Question 6

Are ADs mandatory?

Answer 6

Yes

Question 7

What regulation are ADs issued IAW?

Answer 7

Reg (EU) 2018/1139 - basic regulation