To: Shadin Avionics Dealers
From: Robert Randall, Executive Director of Operations
Subject: AIN Airworthiness Directive Announcement Clarification
Date: 12/27/2005

On Dec. 26, 2005, Aviation International News released a news article about the Airworthiness Directive issued by the FAA for the Shadin Avionics ADC-2000. There were some inaccuracies and potential confusing statements that we’d like to clarify for you and your customers.

First and foremost, the directive relates exclusively to three parts (P/N 962830A-1-S-8, 963830A-2-S-8, 963830A-3-S-8) with configurations B, C and D only of the ADC-2000 “Quick Start” air data computer, which was developed as a sensor for Chelton Flight Systems EFIS display programs primarily used by the CAPSTONE project, a government program in Alaska for conversions of aircraft in that state to glass cockpits. Only about 350 of the potentially affected ADCs were sold. If your customers do not have the “Quick Start” model or do not participate in the CAPSTONE project, the FAA directive does not apply to them.

Shadin Avionics has been successful in managing an aggressive recall, which was issued in June 2005, and to date, we have complied in full with the pending directive on a majority of the 350 potentially effected units delivered.

The FAA directive, which becomes effective on January 23, 2006, allows continuance of operations of the aircraft for 25 flight hours after the effective date if the pilot complies with the preflight conditions stated in the Airworthiness Directive and the Shadin Avionics SB 28-05-2002 Rev. C. Please refer to the directive for a list of aircraft that may be affected.

In an effort to minimize any inconveniences of aircraft operators who utilize the effected ADC-2000, Shadin Avionics will reimburse up to two hours of labor at $65.00 per hour, as well as provide a loaner ADC-2000 while the customer’s unit is being modified. In some cases Shadin Avionics may offer a direct exchange of a modified ADC-2000 in used serviceable condition.

The ADC-2000 has been in production since 1992 with total production numbers exceeding 4,000 units. Shadin Avionics manufactures many different versions of the ADC-2000, most of which are not affected by the FAA directive. Since the discovery of the issues found in the ADC-2000 “Quick Start,” all ADC-2000 units are put through additional rigorous acceptance test procedures before Shadin Avionics quality control inspectors accept the units.

Shadin Avionics remains committed to its customers and strict quality control on all its products, FAA regulations and, above all, safety.

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ADC-6000