Is AD 99-23-01 a recurring Airworthiness Directive?

No — AD 99-23-01 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 99-23-01 apply to?

AD 99-23-01 applies to Robinson Helicopter Company — models R44. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 99-23-01

one-time

Official AD 99-23-01 · FR doc 99-28655 · 1999-11-03 · airframe

Airworthiness Directives; Robinson Helicopter Company (Robinson) Model R44 Helicopters

What this AD requires

This amendment supersedes an existing airworthiness directive (AD), applicable to Robinson Model R44 helicopters, that currently requires removing and replacing the pilot's cyclic control grip assembly (grip assembly) with an airworthy grip assembly. This amendment requires the same actions as the current AD but would change a part number (P/N) referenced in the current AD. This amendment is prompted by the discovery of an error in the P/N of the current AD. The actions specified by this AD are intended to prevent use of a grip assembly that may crack, resulting in failure of the grip assembly and subsequent loss of control of the helicopter.

Which aircraft AD 99-23-01 applies to

MakesRobinson Helicopter Company

ModelsR44

Serial-conditional — narrows to serials 0001–0159.

Part-conditional — A756-6.

Excludes S/N 0143, 0150, and 0156. Applies only when pilot's cyclic control grip assembly P/N A756-6, Revision N or an earlier revision, is installed.

Whether AD 99-23-01 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 99-23-01 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.