Document ID: chunk:federal_register_of_legislation:F2006B10853:body:0:p1
Version: federal_register_of_legislation:F2006B10853
Segment Type: other
Provision Reference: 
Character Range: 0–3676

AIRWORTHINESS DIRECTIVE
 For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/INST/49 and issues the following AD under subregulation 39.1 (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/49
 Amdt 1

 Rockwell Collins Air Data Computers 6/2003

           Applicability: All Rockwell Collins air data computers (ADC) listed below; except ADC-85A computers part number 822-0370-113 or -123 with Rockwell Collins Service Bulletin (SB) 58 incorporated and installed on Saab 340 series aeroplanes.

    Unit                              Part Number        Serial Number
ADC-85                            622-8051-002        All units
(Incorporating Rockwell Collins   622-8051-003
Service Bulletin (SB) 58)
ADC-85A                           822-0370-113        All units
(Incorporating SB 58)             822-0370-123
                                  822-0370-139
                                  822-0370-404
                                  822-0370-408
ADC-850D                          822-0389-133        All up to and including
(Incorporating SB 58)                                 3DGW (except for 1P6D, 22RC-22RF and 23WK-
                                                      3DGP)
ADC-850F                          822-1036-406        All Units
                                  822-1036-418

           Note 1: These ADCs may be installed on, but not limited to, the following aeroplanes:

Unit Aeroplane Model

              ADC-85/ADC-85A

              ADC-850D ADC-850F

     Astra AIA
     Chinese Y7 and Y8 Czech LET-610 DC-8
     Falcon 20F Piaggio P-180
     Raytheon B200, B300, C90A and 1900D Lear 60
     Falcon 20, 50 and 50EX
 Requirement: 1. Unless already accomplished, carry out the following actions in accordance with
              Rockwell Collins SB 62, (ADC-85/85A/850C/850D/850E/850F-34-62), Revision No. 2, dated 7 March 2000, or SB 62, dated 25 October 1999, as applicable, together with the applicable Collins Computer Component Maintenance Manual and Collins Avionics Standard Shop Practices Instruction Manual:

                  1. Remove any affected ADC from the aeroplane.

b.         As applicable, replace or reprogram parts or circuit card assemblies on central processing unit (CPU) circuit cards.

c.         Test the ADC.

              2. Affected ADCs may not be installed on any aeroplane, except Saab 340 series aeroplanes, unless the modification and test required by Requirement 1.b. and c. have been accomplished.

           Note 2: Rockwell Collins Operator Bulletin 99-7, dated August 1999, contains information about an operational placard to install until accomplishment of the actions of this Directive. While not necessary to address the unsafe condition in this Directive, CASA highly recommends that the placard be installed.

           Note 3: FAA AD 2002-14-19 Amdt 39-12819 and FAA Special Airworthiness Information Bulletin CE-03-21 refer.

           Compliance: For Requirement 1 - Remains unchanged as 'Within 12 months after the effective date of the original issue of this Directive'.

           For Requirement 2 - As of the effective