Is AD 99-12-06 a recurring Airworthiness Directive?

No — AD 99-12-06 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 99-12-06 apply to?

AD 99-12-06 applies to Alliedsignal. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 99-12-06

one-time

Official AD 99-12-06 · FR doc 99-14537 · 1999-06-11 · appliance

Airworthiness Directives; AlliedSignal Inc. VN 411B Very High Frequency (VHF) Navigation Receivers

What this AD requires

This amendment adopts a new airworthiness directive (AD) that requires replacing certain AlliedSignal Inc. VN 411B VHF navigation receivers installed on aircraft if the receivers do not have Modification 21 incorporated. This AD is the result of a report of navigation receiver interference during landing operations. The actions specified by this AD are intended to prevent VHF navigation receiver interference from frequency modulation (FM) radio station broadcasts, which could cause distortion of the navigation audio and deflection of the desired flight path of the airplane during landing operations with possible loss of control of the airplane.

Which aircraft AD 99-12-06 applies to

MakesAlliedsignal

Applies to each airplane with an affected AlliedSignal (Bendix/King) VHF navigation receiver installed (the specific receiver model is named in a preceding applicability provision not included in this text excerpt) that does not have Modification 21 incorporated; addresses FM broadcast-frequency interference with VOR/ILS navigation per AlliedSignal Bendix/King Service Bulletin VN 411B-21, dated November 1996.

Whether AD 99-12-06 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 99-12-06 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.