Is AD 2023-05987 a recurring Airworthiness Directive?

No — AD 2023-05987 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2023-05987 apply to?

AD 2023-05987 applies to Viking Air Limited — models DHC-2 Mk. I, DHC-2. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2023-05987

one-time

AD 2023-05987 · 2023-03-24 · airframe

Airworthiness Directives; Viking Air Limited (Type Certificate Previously Held by Bombardier Inc. and de Havilland Inc.) Airplanes

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for Viking Air Limited (type certificate previously held by Bombardier Inc. and de Havilland Inc.) Model DHC-2 Mk. I airplanes with Supplemental Type Certificate (STC) No. SA01324CH installed. This AD was prompted by a report of damage in the main wing spar. This AD requires inspecting the wing structure for damage (drill starts, corrosion, cracks, and improperly installed fasteners), repairing damage, and reporting the inspection results if necessary. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2023-05987 applies to

MakesViking Air Limited

ModelsDHC-2 Mk. I, DHC-2

Part-conditional — SA01324CH.

Applies only to airplanes, all serial numbers, with Supplemental Type Certificate (STC) No. SA01324CH installed. Type certificate previously held by Bombardier Inc. and de Havilland Inc.

Whether AD 2023-05987 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 2023-05987 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.