{"id":"F2010L02493","name":"AD/PW4000/18 - State of Design Airworthiness Directives","slug":"ad-pw4000-18-state-of-design-airworthiness-directives","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":84421,"registerId":"commonwealth-F2010L02493-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Pratt and Whitney Turbine Engines - PW40","sectionType":"division","heading":"Pratt and Whitney Turbine Engines - PW4000 Series","content":"### Pratt and Whitney Turbine Engines - PW4000 Series\n\n```html\n

AD/PW4000/18

State of Design Airworthiness Directives

19/2010

Applicability:

Pratt and Whitney PW4000 engines - all series.

Requirement:

1. Determine the applicability of the FAA Airworthiness Directives (AD) listed in Table 1.

2. If it is determined that a FAA AD listed in Table 1 is applicable and has not been previously accomplished, perform the actions required by that AD or later revision.

Service Bulletins approved by FAA as an Alternative Methods of Compliance (AMOC) to the ADs listed in Table 1 are considered acceptable for compliance with the equivalent requirements of this Airworthiness Directive.

Table 1

FAA AD

Service Bulletin

Title

90-22-02

ASB PW4ENG 72-328

Low Pressure Turbine Shaft

93-08-16

ASB 747-73A2055, ASB 767-73A0033

Fuel Pump

2003-19-15

Refer to the list of SBs in the FAA AD

High-Pressure-Compressor (HPC) Surges

2006-22-13

SB PW4G-112-72-282, Revision 1

Anti-rotation Slots

2007-04-26

ASB PW4G-112-A72-280 Revision 2

High Pressure Compressor (HPC) exit brush seal packs

2008-24-13

ASB PW4ENG A73-214 Revision 2

Electronic Engine Controls (EECs)

2009-04-02

SB PW4G-112-72-290

Front Turbine Hub

\n```\n\n| | Note 1: FAA ADs may be accessed via the internet at the following URL:http://www.faa.gov/regulations_policies/airworthiness_directives/ |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Compliance: | If a certificate of airworthiness has not been issued for the aircraft - before issue of the certificate of airworthiness.If a certificate of airworthiness has been issued for the aircraft - before further flight after 60 days from the effective date of this Directive. |\n| | This Airworthiness Directive becomes effective on 15 October 2010. |\n| Background: | The FAA ADs listed in Table 1 of this Directive require once-only actions for which the compliance date has passed. CASA has determined that these ADs may be applicable to some Australian aircraft. This Directive is issued to ensure compliance with all State of Design ADs.CASA appreciates that, due to the date of engine manufacture or aircraft configuration, some of the ADs listed in Table 1 will not be applicable to any aircraft presently registered in Australia. |\n\n![](image.001.png)\n\nCharles Lenarcic \nDelegate of the Civil Aviation Safety Authority\n\n16 September 2010","sortOrder":0},{"sectionNumber":"AD/PW4000/18","sectionType":"part","heading":"AD/PW4000/18","content":"## AD/PW4000/18","sortOrder":1},{"sectionNumber":"State of Design Airworthiness Directives","sectionType":"part","heading":"State of Design Airworthiness Directives","content":"## State of Design Airworthiness Directives","sortOrder":2},{"sectionNumber":"19/2010","sectionType":"part","heading":"19/2010","content":"## 19/2010","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The Directive preserves the original scope of aligning Australian registered aircraft with State‑of‑Design (FAA) airworthiness directives by requiring applicability checks and completion of listed FAA AD actions (Background). It does not expand the range of affected components beyond the PW4000 series or add new mandatory tasks beyond those in the referenced FAA ADs and approved AMOCs (Applicability; Requirement; Table 1)."},"complexity_factors":["Cross‑reference dependence: directs compliance by referencing multiple FAA ADs rather than prescribing measures directly (Requirement paras 1–2; Table 1).","Multiple service bulletins: Table 1 lists several Service Bulletins and AD numbers that must be checked against aircraft configuration (Table 1).","Applicability determination burden: requires operators/maintenance organisations to determine applicability for each aircraft/engine (Requirement para 1).","Conditional compliance timing: different deadlines depending on whether a certificate of airworthiness has been issued (Compliance paragraph).","Acceptance of alternatives: Service Bulletins approved by FAA as AMOCs are acceptable, introducing reliance on FAA AMOC approvals and revision tracking (Requirement para 2).","Record/retroactive complexity: FAA ADs are once‑only with past compliance dates, requiring historical records review to confirm prior accomplishment (Background)."],"plain_english_summary":"This Directive requires operators of Pratt & Whitney PW4000 engines to check whether the specific FAA airworthiness directives listed in Table 1 apply to their engines and, if so, to carry out the actions the FAA ADs require (or approved Service Bulletin AMOCs). It places the onus on aircraft owners/operators to verify applicability and complete once‑only actions either before issuing a certificate of airworthiness or, for already‑certificated aircraft, before further flight after 60 days, to align Australian aircraft with State‑of‑Design ADs."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope. It is a standard 'State of Design' directive that adopts specific FAA airworthiness requirements for a particular engine series. There is no evidence of scope creep; it does exactly what it says on the tin — ensures Australian PW4000 engines comply with seven identified US safety directives."},"complexity_factors":["Short, single-purpose instrument (approximately 1 page)","Only 2 substantive requirements with clear conditional logic","7 external cross-references to FAA ADs (but these are tabulated, not embedded)","Simple compliance structure with two alternative pathways (new vs existing aircraft)","No defined terms section — relies on standard aviation terminology","Single exception/AMOC provision for alternative compliance methods","Minimal legislative drafting — essentially adopts foreign regulatory requirements by reference"],"plain_english_summary":"This AD requires Australian operators and maintenance organisations to check whether seven specified FAA airworthiness directives for Pratt & Whitney PW4000 engines apply to their equipment and, if so, to carry out the mandated one‑time safety actions (or use an approved alternative). It ensures Australian‑registered aircraft meet the same safety fixes that prevent turbine, fuel pump, compressor surge and control failures. Compliance deadlines include before issue of an airworthiness certificate or within 60 days of 15 Oct 2010."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-pw4000-18-state-of-design-airworthiness-directives","history":"/api/acts/ad-pw4000-18-state-of-design-airworthiness-directives/history","analysis":"/api/acts/ad-pw4000-18-state-of-design-airworthiness-directives/analysis","conflicts":"/api/acts/ad-pw4000-18-state-of-design-airworthiness-directives/conflicts","importantCases":"/api/acts/ad-pw4000-18-state-of-design-airworthiness-directives/important-cases","documents":"/api/acts/ad-pw4000-18-state-of-design-airworthiness-directives/documents"}}