Is AD 2020-17-13 a recurring Airworthiness Directive?

No — AD 2020-17-13 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2020-17-13 apply to?

AD 2020-17-13 applies to Boeing — models 787-8, 787-9, 787. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2020-17-13

one-time

Official AD 2020-17-13 · FR doc 2020-19387 · 2020-09-03 · airframe

Airworthiness Directives; The Boeing Company Airplanes

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 787-8 and 787-9 airplanes. This AD was prompted by reports that the cabin air compressor (CAC) outlet check valve failed due to fatigue of the aluminum flappers, and exposed the Y-duct to temperatures above its design limit. This AD requires installing new inboard and outboard CAC outlet check valves on the left-side and right-side cabin air conditioning and temperature control system (CACTCS) packs. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2020-17-13 applies to

MakesBoeing

Models787-8, 787-9, 787

Applies only to airplanes identified in Boeing Service Bulletin B787-81205-SB210108-00, Issue 002, dated October 15, 2019 (effectivity per that SB, not necessarily every 787-8/-9).

Whether AD 2020-17-13 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.

How AD compliance is recorded

A valid compliance record (14 CFR 43.9) states:

Method of compliance — The specific action taken (inspected, replaced, modified) and to what revision.

Date — When the work was done.

Aircraft time — Total time in service / tach at compliance — how recurring next-due is computed.

Signature & certificate — The A&P/IA who returned it to service, with certificate number.

Is AD 2020-17-13 complied with on your aircraft?

Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.

Look up a tail number →Read the full directive (Federal Register)

Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.