Is AD 2025-07-09 a recurring Airworthiness Directive?

No — AD 2025-07-09 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2025-07-09 apply to?

AD 2025-07-09 applies to Bombardier — models CL-600-1A11, CL-600-2A12, CL-600-2B16, CL-600. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2025-07-09

one-time

Official AD 2025-07-09 · FR doc 2025-09507 · 2025-05-28 · airframe

Airworthiness Directives; Bombardier, Inc., Airplanes

What this AD requires

The FAA is superseding Airworthiness Directive (AD) 2020-19- 13, which applied to certain Bombardier, Inc., Model CL-600-1A11 (600), CL-600-2A12 (601), and CL-600-2B16 (601-3A, 601-3R, and 604 Variants) airplanes. AD 2020-19-13 required a check to identify the manufacturer and part number of the portable oxygen bottle installation, and, if necessary, modification of the portable oxygen bottle installation. This AD continues to require the actions specified in AD 2020-19-13 and expands the applicability. This AD was prompted by a report indicating that the portable oxygen bottle installation's upper bracket latch assembly can catch on the pressure gauge tube or on the pressure gauge bezel of the portable oxygen bottle. This AD was also prompted by the determination that additional airplanes may be subject to the unsafe condition. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2025-07-09 applies to

MakesBombardier

ModelsCL-600-1A11, CL-600-2A12, CL-600-2B16, CL-600

Serial-conditional — narrows to serials 1004–1085, 3001–3066, 5001–5194, 5301–5665, 5701–5988, 6050–6119, 6158–6158, 6161–6161, 6176–6176, 6181–6181.

Part-conditional — 36758-02, 36758-12, H3-2091-1.

Applies to airplanes equipped with Scott (Avox/Zodiac) 5500 or 5600 series 11 cubic foot portable oxygen bottle(s) with upper bracket P/N 36758-02, P/N 36758-12, or P/N H3-2091-1 installed at the neck of the bottle(s).

Whether AD 2025-07-09 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 2025-07-09 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.