Guide · Updated 2026-10-09

How to Track UK Part-66 Licence Expiry

Track UK Part-66 Aircraft Maintenance Licence expiry as its own dated requirement: copy the licence number, categories, limitations and face expiry from the licence or CAA verification, set a reminder far enough ahead for renewal processing, and keep type ratings and company authorisations on separate rows so a current AML never hides a missing endorsement.

Quick answer

Create a dedicated Part-66 AML requirement for each licensed engineer. Store identity, licence number, categories and limitations, issue and expiry dates, and a legible evidence file. Verify status with the CAA where your quality process requires it. Then link — do not merge — type ratings and Part-145 authorisations so planners can see which clock fails first. UK Part-66 AMLs are commonly discussed around a five-year validity period; always use the dates on the licence in front of you rather than assuming every colleague shares the same anniversary.

What the AML date does and does not mean

The AML expiry is the licence currency date for the holder’s Part-66 framework privileges. It does not prove that a specific type endorsement is current, that human-factors continuation training is in date, or that your organisation has granted certifying staff authorisation under its Part-145-style approval. Collapsing those facts into one green cell is the most common reason hangar sheets look ready while a shift brief finds a gap.

  • Copy expiry exactly — do not round to month-end
  • Record category codes and limitations as structured fields
  • Keep a readable licence image or verification note beside the date
  • Archive superseded licence evidence when the date moves after renewal

A workable tracking routine

  1. Inventory every person whose work depends on a UK Part-66 AML — hangar, line and outstation cover.
  2. Enter AML expiry and category detail from the licence; confirm with CAA channels when your procedure says so.
  3. Add separate requirements for each type rating and for company certifying authorisation.
  4. Filter AMLs expiring in the next 90–180 days before heavy-check or peak line seasons.
  5. Update the matrix only when new evidence is in hand — not when a renewal application is merely booked.

Renewal lead time versus roster lead time

CAA renewal windows tell you when an application can be processed. Your roster tells you when a named person must still be available to certify or support a work package. Drive reminders from the second date. A licence that renews “in time” for the authority can still arrive after the engineer was due on a night line cover. Build reminder horizons that cover application processing, any outstanding continuation training your company requires for authorisation to remain in force, and contingency if a document is queried.

Renewal lead time versus roster lead time
ClockTypical failure if ignoredKeep separate?
AML expiryLicence currency lost while badge still looks fineYes — primary licence row
Type endorsementWrong aircraft typed for the work orderYes — per type
Company authorisationCannot release under the organisation approvalYes — quality letter/stamp
HF / EWIS continuationCompany training control fails while AML is validYes — per module

CAA sources and FieldClear trackers

Follow current CAA instructions for renewing a UK Part-66 aircraft maintenance licence and read Part-66 general guidance for pathway context. Operationally, keep live dates in the UK Part-66 AML expiry tracker, pair with aircraft type rating expiry and Part-145 certifying authorisation expiry, and use the broader certificate expiry tracker when AML rows sit beside other dated holdings.

Honest limits

FieldClear stores and reminds on the Part-66 dates and evidence you enter. It does not renew licences, grant CAA privileges, certify airworthiness, or decide whether a person may release an aircraft. Verify status with the CAA where required. This guide is not legal or aviation regulatory advice.

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