Is AD 2023-04946 a recurring Airworthiness Directive?

No — AD 2023-04946 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive 2023-04946

Q: Which aircraft does AD 2023-04946 apply to?

AD 2023-04946 applies to Mhi Rj Aviation Ulc — models CL-600-2C10, CL-600-2C11, CL-600-2D15, CL-600-2D24, CL-600-2E25, CL-600. Serial/part conditions may narrow it to specific aircraft.

one-time

AD 2023-04946 · 2023-03-10 · airframe

Airworthiness Directives; MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for certain MHI RJ Aviation ULC Model CL-600-2C10 (Regional Jet Series 700, 701 & 702); CL-600-2C11 (Regional Jet Series 550); CL-600-2D15 (Regional Jet Series 705); CL-600-2D24 (Regional Jet Series 900); and CL-600-2E25 (Regional Jet Series 1000) airplanes. This AD was prompted by laboratory tests that showed that the oxygen tubes of the crew oxygen system may be contaminated with lubricants, as a result of the manufacturing and cleaning procedures used. This AD requires cleaning and flushing the crew oxygen system. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2023-04946 applies to

MakesMhi Rj Aviation Ulc

ModelsCL-600-2C10, CL-600-2C11, CL-600-2D15, CL-600-2D24, CL-600-2E25, CL-600

Serial-conditional — narrows to serials 10346–10346, 10347–10347, 15413–15484, 19049–19064.

Also applies, regardless of serial number, to CL-600-2C10, CL-600-2C11, CL-600-2D15, CL-600-2D24, and CL-600-2E25 airplanes equipped with tube part numbers installed after the dates in Section 1.A.(2) of MHI RJ Service Bulletin (SB) 670BA-35-016, Revision B, dated December 17, 2021.

Whether AD 2023-04946 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 2023-04946 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.