COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Pratt and Whitney Turbine Engines - JT9D Series
AD/JT9D/19
Amdt 2
Surge Margin Improvements 3/93
Applicability: JT9D-7R4D, E series engines installed in Boeing B767 aircraft.
Requirement: Action in accordance with FAA Airworthiness Directive 90-14-08, paragraphs (a), (b), (c), (d), (e), (f), (g), (h) and (i).
For the purpose of this Directive, compliance with the requirements of PWA SB JT9D-7R4-75-101 is deemed to be an alternative method of compliance with the requirements of FAA AD 90-14-08, paragraph (d), (2).
Compliance: As detailed in the requirement document, with an effective date of 4 March 1993.
Background: This Directive has been amended to reflect the release of an additional procedure which, if incorporated, will improve the JT9D-7R4 surge margin.