Is AD 98-24-23 a recurring Airworthiness Directive?

No — AD 98-24-23 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 98-24-23 apply to?

AD 98-24-23 applies to Eurocopter — models SA316. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 98-24-23

one-time

Official AD 98-24-23 · FR doc 98-31330 · 1998-11-25 · airframe

Airworthiness Directives; Eurocopter France Model SE.3160, SA.316B, SA.316C, and SA.319B Helicopters

What this AD requires

This amendment adopts a new airworthiness directive (AD) that is applicable to Eurocopter France Model SE.3160, SA.316B, SA.316C, and SA.319B helicopters. This action requires inspecting certain horizontal stabilizer spar tubes and replacing them if cracks are found or repairing them if crazing, corrosion, fretting marks, or scratches are found and are repairable. This amendment is prompted by several service reports of spar tube corrosion and fatigue cracks discovered during normal maintenance inspections, which could cause loss of the horizontal stabilizer and subsequent loss of control of the helicopter.

Which aircraft AD 98-24-23 applies to

MakesEurocopter

ModelsSA316

Part-conditional — 3160.35.30.031.1, 3160.35.30.031.2.

Horizontal stabilizer spar tube P/N 3160.35.30.031.1 or .2; visual/dye-penetrant inspection of embedded areas near left/right attach fittings, repair or replace per Eurocopter France SB 05.84 Rev 2. Part-number prefix '3160' indicates the Aerospatiale/Eurocopter Alouette III family (SA316/SA319); specific variant not stated in text.

Whether AD 98-24-23 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 98-24-23 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.