Is AD 89-20-06 a recurring Airworthiness Directive?

No — AD 89-20-06 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 89-20-06 apply to?

AD 89-20-06 applies to Honeywell, Inc., Sperry — models NZ-600, NZ-800, NZ-900, FMZ-800. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 89-20-06

one-time

AD 89-20-06 · 1989-01-01 · appliance

Airworthiness Directives; HONEYWELL, INC

Which aircraft AD 89-20-06 applies to

MakesHoneywell, Inc.Sperry

ModelsNZ-600, NZ-800, NZ-900, FMZ-800

Part-conditional — 7004402-653, 7004402-654, 7004402-801.

Applies to Sperry FMZ-800 Flight Management Systems (FMS), Model NZ-600, NZ-800, and NZ-900 series Navigation Computers. Requires inserting a copy of the AD into the Limitations Section of the FAA-approved Airplane Flight Manual (AFM) or AFM Supplement (AFMS).

Whether AD 89-20-06 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 89-20-06 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 →

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.