Is AD 2019-21-11 a recurring Airworthiness Directive?

Yes — AD 2019-21-11 requires a repetitive inspection. Next-due depends on the aircraft's time in service.

Airworthiness Directive 2019-21-11

Q: Which aircraft does AD 2019-21-11 apply to?

AD 2019-21-11 applies to Pratt & Whitney — models PW1519G, PW1521G, PW1521GA, PW1524G, PW1525G, PW1521G-3, PW1524G-3, PW1525G-3. Serial/part conditions may narrow it to specific aircraft.

recurring

Official AD 2019-21-11 · FR doc 2019-23715 · 2019-10-29 · turbine engine

Airworthiness Directives; Pratt & Whitney Turbofan Engines

What this AD requires

The FAA is superseding Airworthiness Directive (AD) 2019-19-11 for certain Pratt & Whitney (PW) PW1519G, PW1521G, PW1521GA, PW1524G, PW1525G, PW1521G-3, PW1524G-3, PW1525G-3, PW1919G, PW1921G, PW1922G, PW1923G, and PW1923G-A model turbofan engines. AD 2019-19-11 required initial and repetitive inspections of the low-pressure compressor (LPC) inlet guide vane (IGV) and the LPC rotor 1 (R1) and, depending on the results of the inspections, possible replacement of the LPC. This AD requires the same inspection of the LPC R1 for cracks or damage, removes the inspection of the LPC IGV for proper alignment, and expands the applicability to certain additional PW turbofan engines. This AD also reduces the compliance time for these inspections for certain PW turbofan engines. This AD was prompted by recent findings of cracks in the LPC R1 and an additional in-flight failure of the LPC R1. The FAA is issuing this AD to address the unsafe condition on these products.

Repetitive inspection. Re-inspect. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 2019-21-11 applies to

MakesPratt & Whitney

ModelsPW1519G, PW1521G, PW1521GA, PW1524G, PW1525G, PW1521G-3, PW1524G-3, PW1525G-3, PW1919G, PW1921G, PW1922G, PW1923G, PW1923G-A, PW1500G, PW1900G

Applies only to engines that have accumulated fewer than 300 flight cycles since new (CSN), or fewer than 300 flight cycles since installation of v2.11.7 or v2.11.8 electronic engine control (EEC) software.

Whether AD 2019-21-11 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 2019-21-11 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.