Document ID: chunk:federal_register_of_legislation:F2007L03989:body:0:p1
Version: federal_register_of_legislation:F2007L03989
Segment Type: other
Provision Reference: 
Character Range: 0–5274

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.

Boeing 717 Series Aeroplanes
AD/B717/25  Power Coversion Distribution Unit  11/2007

Applicability:  Model 717-200 aeroplanes.
Requirement:       1. Inspect the power conversion distribution units (PCDU) to determine its part number.  A review of aeroplane maintenance records is acceptable in lieu of this inspection if the part number can be conclusively determined from that review.  If the PCDU part number is 762904E or higher, no further work is required by this Directive.
                   2. If, as a result of the Requirement 1 inspection, it is determined that the PCDU part number is below 762904E, carry out the following:
                     a. Modify the PCDU in accordance with Boeing Alert Service Bulletin (ASB) 717-24A0028, Revision 1, dated 20 December 2005.
                Note 1:  A modification accomplished before the effective date of this Directive in accordance with Boeing ASB 717-24A0028, dated 24 November 2004, is acceptable for compliance with Requirement 2.a.
                Note 2:  Boeing ASB 717-24A0028 refers to Hamilton Sundstrand Service Bulletin 40EGS22P-24-10, Revision 1, dated 11 May 2005, as an additional source of service information for the modification.
                     b. Accomplish the applicable actions specified in Table 1.

                                                                                Table 1
                                                                                Do the following:                                                                                                                                                                                                                                                    In accordance with Hamilton Sundstrand Service Bulletin (SB):
Rework the transformer rectifier unit assembly (TRU)                            40EGS22P-24-3, dated 30 June 2000

Rework the W3 wiring harness assembly to install direct lead wires to the TRU

Add a ground wire to the TRU transformer

Add an insulated spacer to the PCDU top cover
                                                                                Install new PCDU 186 firmware                                                                                                                                                                                                                                        40EGS22P-24-4, Revision 1, dated 2 January 2002
                                                                                Install new PCDU 186 firmware                                                                                                                                                                                                                                        40EGS22P-24-6, dated 25 July 2002
                                                                                Modify the top cover of the PCDU                                                                                                                                                                                                                                     40EGS22P-24-7, dated 3 September 2003
                                                                                Modify printed wiring board (PWB) assemblies A4 and A5                                                                                                                                                                                                               40EGS22P-24-8, dated 4 September 2003

                                                                                Check and apply torque seal to fasteners on the TRU assembly and to PCDU internal fasteners, as applicable
                                                                                Modify PWB assembly A4                                                                                                                                                                                                                                               40EGS22P-24-9, dated 19 November 2003
                                                                                Later revisions of the above SBs, approved by the United States Federal Aviation Administration (FAA) as an Alternate Method of Compliance (AMOC) to FAA AD 2007-19-03 are considered acceptable for compliance with the equivalent Requirements of this Directive.
                                                                                Note