Is AD 99-23-04 a recurring Airworthiness Directive?

No — AD 99-23-04 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 99-23-04 apply to?

AD 99-23-04 applies to Bell Helicopter Textron Canada — models 222, 222B, 222U. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 99-23-04

one-time

Official AD 99-23-04 · FR doc 99-28653 · 1999-11-04 · airframe

Airworthiness Directives; Bell Helicopter Textron Canada Model 222, 222B, and 222U Helicopters

What this AD requires

This amendment adopts a new airworthiness directive (AD) that is applicable to Bell Helicopter Textron Canada (BHTC) Model 222, 222B, and 222U helicopters. This action requires verifying the torque on each vertical fin attachment bolt (bolt); inspecting the vertical fin and tailboom fittings for cracks, elongation of bolt holes, distortion and corrosion; and re-verifying the torque on the bolts after inspecting the fittings. This amendment is prompted by a report of a loose vertical fin, which was discovered during a post-flight inspection. The actions specified in this AD are intended to prevent loss of torque of the bolts, which could lead to fracture of the bolts, separation of the vertical fin from the helicopter, and subsequent loss of control of the helicopter.

Which aircraft AD 99-23-04 applies to

MakesBell Helicopter Textron Canada

Models222, 222B, 222U

Serial-conditional — narrows to serials 47006–47089, 47131–47156, 47501–47574.

S/N 47006-47089 apply to Model 222, S/N 47131-47156 to Model 222B, and S/N 47501-47574 to Model 222U.

Whether AD 99-23-04 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 99-23-04 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.