Is AD 2017-04-12 a recurring Airworthiness Directive?

No — AD 2017-04-12 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive 2017-04-12

Q: Which aircraft does AD 2017-04-12 apply to?

AD 2017-04-12 applies to Embraer — models EMB-135ER, EMB-135KE, EMB-135KL, EMB-135LR, EMB-135BJ, EMB-145, EMB-145EP, EMB-145ER. Serial/part conditions may narrow it to specific aircraft.

one-time

Official AD 2017-04-12 · FR doc 2017-03259 · 2017-02-22 · airframe

Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (Embraer) Airplanes

What this AD requires

We are adopting a new airworthiness directive (AD) for certain Empresa Brasileira de Aeronautica S.A. (Embraer) Model EMB-135BJ, EMB- 135ER, EMB-135KE, EMB-135KL, EMB-135LR, EMB-145, EMB-145EP, EMB-145ER, EMB-145LR, EMB-145MP, EMB-145MR, and EMB-145XR airplanes. This AD was prompted by reports of main airspeed indication discrepancies during flight; these discrepancies resulted from ice blockages in certain pitot total pressure lines. This AD requires an inspection for tube misalignment of the pitot number 1 and pitot number 2 tube assembly lines, and corrective actions if necessary; installation or replacement (as applicable) of a tube ribbon heater on the pitot number 1 and pitot number 2 tube assembly lines; and revision of the airplane flight manual (AFM) to provide certain procedures and airspeed tables for the flightcrew. We are issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2017-04-12 applies to

MakesEmbraer

ModelsEMB-135ER, EMB-135KE, EMB-135KL, EMB-135LR, EMB-135BJ, EMB-145, EMB-145EP, EMB-145ER, EMB-145LR, EMB-145MP, EMB-145MR, EMB-145XR, EMB-135

Serial-conditional — narrows to serials 14501153–?, 14501190–14501197, 14501199–14501210, 14501212–14501227, 14501229–?.

Applicability is defined in four groups: (1) EMB-135ER/KE/KL/LR and EMB-145/EP/ER/LR/MP/MR/XR airplanes as identified in Embraer Service Bulletin 145-30-0056, Revision 03, dated February 6, 2015; (2) EMB-135BJ airplanes as identified in Embraer Service Bulletin 145LEG-30-0021, dated March 31, 2014; (3) EMB-135ER/KE/KL/LR and EMB-145/EP/ER/LR/MR/MP/XR airplanes, MSN 14501153 and subsequent; (4) EMB-135BJ airplanes, MSNs 14501190 through 14501197 inclusive, 14501199 through 14501210 inclusive, 14501212 through 14501227 inclusive, and 14501229 and subsequent.

Whether AD 2017-04-12 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 2017-04-12 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.