Is AD 2012-02-08 a recurring Airworthiness Directive?

No — AD 2012-02-08 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2012-02-08 apply to?

AD 2012-02-08 applies to Acss — models TCAS 3000SP, TCAS 2000, TCAS II, Military TCAS 2000, T2CAS. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2012-02-08

one-time

Official AD 2012-02-08 · FR doc 2012-2560 · 2012-02-07 · appliance

Airworthiness Directives; Aviation Communication & Surveillance Systems (ACSS) Traffic Alert and Collision Avoidance System (TCAS) Units

What this AD requires

We are adopting a new airworthiness directive (AD) for certain ACSS TCAS units installed on but not limited to various transport and small airplanes. This AD was prompted by reports of anomalies with TCAS units during a flight test over a high density airport. The TCAS units dropped several reduced surveillance aircraft tracks because of interference limiting. This AD requires upgrading software. We are issuing this AD to prevent TCAS units from dropping tracks, which could compromise separation of air traffic and lead to subsequent mid-air collisions.

Which aircraft AD 2012-02-08 applies to

MakesAcss

ModelsTCAS 3000SP, TCAS 2000, TCAS II, Military TCAS 2000, T2CAS

Part-conditional — 9003500-10900, 9003500-10901, 9003500-10902, 9003500-55900, 9003500-55901, 9003500-55902, 9003500-57901, 9003500-65900.

TCAS units with the listed part numbers (per ACSS Technical Newsletter 8008359, Revision B) as installed on but not limited to various transport and small airplanes. Source applicability text is truncated after the T2CAS part-number row (cuts off mid-table at 'Revision 03,'), so the T2CAS part-number list may be incomplete.

Whether AD 2012-02-08 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 2012-02-08 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.