Is AD 99-45 a recurring Airworthiness Directive?

No — AD 99-45 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 99-45 apply to?

AD 99-45 applies to Twin Commander — models 500, 680, 690, 695. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 99-45

one-time

AD 99-45 · 1999-01-05 · airframe

Airworthiness Directives; Twin Commander Aircraft Corporation 500, 680, 690, and 695 Series Airplanes

What this AD requires

This action confirms the effective date of Airworthiness Directive (AD) 98-08-25 R1, which applies to certain Twin Commander Aircraft Corporation (Twin Commander) 500, 680, 690, and 695 series airplanes. AD 98-08-25 R1 requires replacing the nose landing gear (NLG) drag link bolt with an approved heat-treated bolt that has the manufacturer's serial number, manufacture date, and the last three digits of the drawing number (055) on the bolt head; and changing the bolt part number (P/N) to be installed on Models 690D and 695A from P/N ED10055 to P/N 750076-1. This AD was the result of the FAA inadvertently transposing the serial numbers of the 4 affected Model 695A airplanes. The actions specified in this AD are intended to prevent the NLG from collapsing due to failure of a drag link bolt, which could result in loss of control of the airplane during landing operations.

Which aircraft AD 99-45 applies to

MakesTwin Commander

Models500, 680, 690, 695

Part-conditional — 750076-1.

certain

Whether AD 99-45 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 99-45 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.