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Airworthiness Directive - ADJT9D39 - One-Piece Fan Case Shield

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					COMMONWEALTH OF AUSTRALIA                                               (Civil Aviation Safety Regulations 1998), PART 39 - 106
CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES



                                              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 39.1 (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.


Pratt and Whitney Turbine Engines - JT9D Series

AD/JT9D/39                                            One-Piece Fan Case Shield                                                        4/2004

Applicability:            Pratt & Whitney (PW) JT9D-7R4D, -7R4D1, -7R4E, -7R4E1, -7R4E4, - 7R4G2, and
                          -7R4H1 turbofan engines with steel fan cases.

                          Note 1: These engines are installed on, but not limited to, Airbus Industrie A300 and
                          A310, and Boeing 747 and 767 aeroplanes.

Requirement:              1.    For PW JT9D-7R4D, -7R4D1, -7R4E, -7R4E1, -7R4E4, and -7R4H1 turbofan
                                engines with steel fan cases that have PW Service Bulletin (SB) 72-312
                                incorporated, replace fan case shield Part Number (P/N) 802095 with the four-
                                piece fan case shield and install four fan case shield supports. Information on
                                replacing fan case shields and installing fan case shield supports can be found in
                                PW SB JT9D-7R4- 72-583.

                          2.    For PW JT9D-7R4G2 turbofan engines with steel fan cases that have PW SB 72-
                                88 and PW SB 72-311 incorporated, replace fan case shield P/N 802094 with the
                                four-piece fan case shield and install four fan case shield supports. Information
                                on replacing fan case shields and installing fan case shield supports can be found
                                in Part A of PW SB JT9D-7R4-72-584.

                          3.    For PW JT9D-7R4G2 turbofan engines with steel fan cases that do not have PW
                                SB 72-88 incorporated, but have PW SB 72-311 incorporated, replace fan case
                                shield P/N 802094 with the four-piece fan case shield and install four fan case
                                shield supports. Information on replacing fan case shields and installing fan case
                                shield supports can be found in Part B of PW SB JT9D-7R4-72-584.

                          Note 2: FAA AD 2004-01-08 Amdt 39-13422 refers.

Compliance:               Unless previously accomplished, at the next shop visit but no later than 31 December
                          2012.

                          For the purpose of this Directive, a shop visit is defined as separation of the B-flange
                          during in-shop maintenance. Separation of the B-flange in order to replace fan case
                          assemblies for rub strip repairs is not considered a shop visit.

                          This Airworthiness Directive becomes effective on 15 April 2004.




                                                                                                                                      Page 1 of 2
COMMONWEALTH OF AUSTRALIA                                            (Civil Aviation Safety Regulations 1998), PART 39 - 106
CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES

Pratt and Whitney Turbine Engines - JT9D Series

AD/JT9D/39 (continued)

Background:             This Directive requires on JT9D-7R4 series turbofan engines with steel fan cases,
                        replacement of the existing one-piece fan case shield with a thicker four-piece fan
                        case shield that will add four fan case shield supports. This Directive is in response to
                        two uncontained full fan blade fracture events that resulted in penetration of the steel
                        fan case and fan case shield. The actions detailed in this Directive are to prevent
                        uncontained fan blade failures, resulting in damage to the aeroplane.




James Coyne
Delegate of the Civil Aviation Safety Authority

4 March 2004




The above AD is notified in the Commonwealth of Australia Gazette on 24 March 2004.



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Description: Airworthiness Directive - ADJT9D39 - One-Piece Fan Case Shield