Is AD 2018-26-06 a recurring Airworthiness Directive?

Yes — AD 2018-26-06 requires a repetitive inspection. Next-due depends on the aircraft's time in service.

Which aircraft does AD 2018-26-06 apply to?

AD 2018-26-06 applies to The Boeing Company — models 737-600, 737-700, 737-700C, 737-800, 737-900, 737-900ER, 737. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2018-26-06

recurring

Official AD 2018-26-06 · FR doc 2018-28077 · 2018-12-28 · airframe

Airworthiness Directives; The Boeing Company Airplanes

What this AD requires

We are adopting a new airworthiness directive (AD) for all The Boeing Company Model 737-600, -700, -700C, -800, -900, and -900ER series airplanes. This AD was prompted by reports of loose, worn, or missing attachment bolts for the main landing gear (MLG) center door assemblies. This AD requires repetitive detailed inspections of the forward and aft MLG center door assembly attachments for loose, missing, damaged, or bottomed-out attachment bolts, and any wear to the retention clip assemblies as applicable; and applicable on-condition actions. This AD also provides an optional terminating action for the repetitive inspections. We are 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 2018-26-06 applies to

MakesThe Boeing Company

Models737-600, 737-700, 737-700C, 737-800, 737-900, 737-900ER, 737

Applicability subdivided per Boeing Special Attention Service Bulletin 737-52-1170, Revision 1, dated December 19, 2017: Group 1 and Group 2 Configuration 1; Group 2 Configuration 2; Group 3 (line number 4275 through the line number of an airplane with an original/export Certificate of Airworthiness dated on or before the AD effective date, plus line 6736); and all covered models with an original/export Certificate of Airworthiness dated after the AD effective date. Installation of STC ST00830SE does not affect applicability or AMOC requirements.

Whether AD 2018-26-06 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 2018-26-06 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.