Document ID: chunk:federal_register_of_legislation:F2005L04152:body:0:p1
Version: federal_register_of_legislation:F2005L04152
Segment Type: other
Provision Reference: 
Character Range: 0–5954

AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.001(1) of CASR 1998.  The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

Instruments and Automatic Pilots
AD/INST/53  Shadin ADC-2000 Units  2/2006 DM

Applicability:  Shadin ADC-2000 air data computers (ADC), part numbers (P/N) 962830A-1-S-8, 962830A-2-S-8 or 962830A-3-S-8, Configurations B, C and D.
                Note 1:  ADC-2000 ADCs are known to be installed in, but not limited to, the following aircraft:
                     Manufacturer                                                                                                                                                                                                                                                                                                                  Model

                    Alliance Aircraft Group, LLC                                                                                                                                                                                                                                                                                                 H-250
                    B-N Group Ltd                                                                                                                                                                                                                                                                                                                BN2A
                    Bombardier Inc                                                                                                                                                                                                                                                                                                               DHC-3, DHC-6
                    Cessna Aircraft Company                                                                                                                                                                                                                                                                                                      172, 180, 180E, 185, 206, 206E, 206F, 206G 208, 210L, 310
                                                                                                                                                                                                                                                                                                                                                 DHC-2
                    de Havilland Inc                                                                                                                                                                                                                                                                                                             PA-28-180, PA-28-181, PA-31-350,
                    The New Piper Aircraft, Inc                                                                                                                                                                                                                                                                                                  PA-32-300, PA-32-301, PA-32R-300,
                                                                                                                                                                                                                                                                                                                                                 PA-34-200T
Requirement:       1. Perform a pre-flight check in accordance with Paragraph E - Interim Procedures of Shadin Service Bulletin SB28–05–002, Rev C, dated 29 June 2005 to ensure the ADC and the Electronic Flight Information System (EFIS) altimetry accuracy (ie the altitudes, altimeter and elevation do not differ by more than 75 feet).
                Requirement 1 may be performed by pilot, other than a student pilot, endorsed on the type.  The requirement to perform a pre-flight check in accordance with this Directive is to be entered on the Maintenance Release in the Maintenance Required Section and compliance is to be certified before each flight.
                   2. If, as a result of the Requirement 1 check, the required altimetry accuracy is not confirmed, install a placard with letters at least 6mm (0.25 in) high in clear view of the pilot stating:
                 "FLIGHT IN IMC OR UNDER IFR NOT PERMITTED"
                   3. Return all affected ADCs to the Shadin Repair Facility for upgrade.

             Note 2:  Contact the Shadin Technical Support Department for a Return Merchandise Authorization (RMA) number before returning the ADC.
             Until the ADC-2000 is modified, returned and reinstalled, the aeroplane may only be flown if minimum equipment requirements for that aeroplane are still met.  Once the upgraded ADC has been reinstalled the Requirement 2 placard may be removed.
                4. Shadin ADC-2000, P/N 962830A-1-S-8, 962830A-2-S-8 or 962830A-3-S-8, Configurations B, C, and D, may not be installed on any aeroplane either as an initial installation or as a replacement spare unless it has been upgraded as specified in Requirement 2.
             Note 3:  FAA AD