{"id":"F2012L01114","name":"AD/RB211/47 - State of Design Airworthiness Directives - 2","slug":"ad-rb211-47-state-of-design-airworthiness-directives-2","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":163110,"registerId":"commonwealth-F2012L01114-current","compilationNumber":null,"startDate":"2026-04-04","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Rolls Royce Turbine Engines - RB211 Seri","sectionType":"division","heading":"Rolls Royce Turbine Engines - RB211 Series","content":"### Rolls Royce Turbine Engines \\- RB211 Series\n\n| AD/RB211/47 | State of Design Airworthiness Directives - 2 | 11/2012 |\n| ----------- | -------------------------------------------- | ------- |\n\n```html\n

Applicability:

RB211-22B, -524, -524B, -524C, -524D, -524H2 and -524H-T engines as specified in the requirement documents.

Requirement:

1. Determine the applicability of the Rolls-Royce Service Bulletins listed in Table 1.

2. If it is determined that a Service Bulletin listed in Table 1 is applicable and has not been previously accomplished, perform the actions required by that Service Bulletin at the nominated date or later approved version.

Table 1

CAA AD

R-R SB

Date of SB

Title

G-0032 PRE 80

75-4818

2 Dec 77

Engine - Compressor bleed valve control system

G-0037 PRE 80

72-5201

22 Jul 83

Engine - HP compressor rotor

G-019-03-81

73-5184

28 Feb 81

Engine Fuel and Control - Fuel filter in HP line

G-001-12-2000

72-D021

11 Jan 06

Engine - IP and LP compressor location bearings

G-005-01-2001

72-D342

22 Aug 01

Engine - IP turbine disc cooling holes

Compliance:

Before issue of a certificate of airworthiness to an aircraft in which one of the applicable engines is installed.

This Airworthiness Directive becomes effective on 8 June 2012.

\n```\n\n| Background: | The ADs listed in Table 1 of this Directive require once-only actions for which the compliance date has passed. RB211 engines to which these ADs apply can be installed in aircraft that may be registered in Australia in the future. This Directive is issued to ensure such aircraft comply with all state-of-design ADs. |\n| ----------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)\n\nMike Higgins \nDelegate of the Civil Aviation Safety Authority\n\n25 May 2012","sortOrder":0},{"sectionNumber":"AD/RB211/47","sectionType":"part","heading":"AD/RB211/47","content":"## AD/RB211/47","sortOrder":1},{"sectionNumber":"State of Design Airworthiness Directives","sectionType":"part","heading":"State of Design Airworthiness Directives - 2","content":"## State of Design Airworthiness Directives - 2","sortOrder":2},{"sectionNumber":"11/2012","sectionType":"part","heading":"11/2012","content":"## 11/2012","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The Directive maintains the original scope: ensure RB211 engines installed in aircraft registered in Australia comply with specified state-of-design once-only AD actions before a certificate of airworthiness is issued (Background; Compliance)."},"complexity_factors":["Multiple engine variants and several Service Bulletins spanning decades create a non-trivial applicability assessment (Requirement paras 1–2; Table 1).","Obligation is retroactive: once‑only actions with past compliance dates must be completed prior to airworthiness certification for future installations (Background; Compliance).","Determination of applicability requires technical judgement by the operator/maintainer, which may need engineering records and parts history (Requirement para 1).","Must accept actions at the nominated SB dates or later approved versions, introducing version-control and approval tracking (Requirement para 2).","Cross-jurisdictional linkage to state-of-design ADs means reliance on foreign-issued service information and potential coordination or translation of technical standards (Background)."],"plain_english_summary":"This Directive requires owners/maintainers to check whether any Rolls‑Royce Service Bulletins listed in Table 1 apply to RB211-22B and -524 series engines, and if applicable to carry out the once-only actions (or an approved later revision) before issuing a certificate of airworthiness. It affects aircraft owners/operators and maintenance organisations installing these engine types, who pay for and must document the required maintenance before the aircraft can be registered in Australia."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow scope. It is a 'catch-up' mechanism ensuring state-of-design ADs are applied to engines in newly-registered Australian aircraft. The scope has not expanded beyond this specific administrative purpose."},"complexity_factors":["Short, single-purpose directive with only 2 operative paragraphs","Relies on external documents (5 Rolls-Royce Service Bulletins) without reproducing their content","Simple conditional logic: check applicability → perform action if applicable and not already done","No defined terms section; uses standard aviation terminology","Single compliance trigger (certificate of airworthiness issuance)","Tabular format for cross-referenced documents aids readability","No nested exceptions or complex temporal calculations"],"plain_english_summary":"This CASA Airworthiness Directive targets specific Rolls‑Royce RB211 engines and requires owners/operators to check five named Rolls‑Royce service bulletins and complete any applicable repairs or modifications if not already done. \n\nIt affects airlines and anyone registering aircraft with these engines in Australia, ensuring compliance with original state‑of‑design safety requirements for critical parts (compressor rotors, fuel filters, turbine disc cooling holes) before a certificate of airworthiness is issued."},"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-rb211-47-state-of-design-airworthiness-directives-2","history":"/api/acts/ad-rb211-47-state-of-design-airworthiness-directives-2/history","analysis":"/api/acts/ad-rb211-47-state-of-design-airworthiness-directives-2/analysis","conflicts":"/api/acts/ad-rb211-47-state-of-design-airworthiness-directives-2/conflicts","importantCases":"/api/acts/ad-rb211-47-state-of-design-airworthiness-directives-2/important-cases","documents":"/api/acts/ad-rb211-47-state-of-design-airworthiness-directives-2/documents"}}