Is AD 98-24-31 a recurring Airworthiness Directive?

No — AD 98-24-31 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 98-24-31 apply to?

AD 98-24-31 applies to Bell — models 430. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 98-24-31

one-time

Official AD 98-24-31 · FR doc 99-909 · 1999-01-19 · airframe

Airworthiness Directives; Bell Helicopter Textron Canada (BHTC) Model 430 Helicopters

What this AD requires

This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 98-24-31, which was sent previously to all known U.S. owners and operators of BHTC Model 430 helicopters by individual letters. This AD requires, within 10 hours time-in-service (TIS), inspecting the lateral control tube (control tube) assembly and the forward fairing assembly for chafing. If chafing is found, replace the control tube assembly and rework the forward fairing assembly before further flight. If no chafing is found during the initial inspection, perform the corrective actions within the next 150 hours TIS. This amendment is prompted by two incidents of binding of the control tube assembly that occurred during flight. The actions specified by this AD are intended to prevent binding of the control tube assembly with the inside surface of the forward fairing assembly under certain load conditions and subsequent loss of control of the helicopter.

Which aircraft AD 98-24-31 applies to

MakesBell

Models430

Part-conditional — 430-061-822-101, 430-001-018-101, 430-001-018-113.

Applies where forward fairing assembly P/N 430-061-822-101 and lateral control tube assembly P/N 430-001-018-101 are installed; requires inspection for chafing and replacement of the control tube with airworthy P/N 430-001-018-113 plus fairing rework, per Bell ASB No. 430-98-6.

Whether AD 98-24-31 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 98-24-31 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.