{"id":"F2006B02224","name":"AD/AE 3007/3 - High Pressure Turbine Wheel","slug":"ad-ae-3007-3-high-pressure-turbine-wheel","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41454,"registerId":"commonwealth-F2006B02224-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# ![](image.001.png)  \nAIRWORTHINESS DIRECTIVE\n\nFor 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.\n\n![](image.001.png)\n\nRolls Royce (Allison) Turbine Engines \\- AE 3007 Series","sortOrder":0},{"sectionNumber":"AD/AE 3007/3 High Pressure Turbine Wheel","sectionType":"part","heading":"AD/AE 3007/3 High Pressure Turbine Wheel 10/2004","content":"# AD/AE 3007/3 High Pressure Turbine Wheel 10/2004\n\nApplicability: Rolls-Royce Corporation (formerly Allison Engine Company) models AE3007A and AE 3007C turbofan engines with 2nd stage HPT wheels with SN's prior to MM183060.\n\nRequirement: 1. Unless previously accomplished perform a one-time acid etch inspection to the 2nd stage high pressure turbine wheel in accordance with the Accomplishment Instructions contained in the following Rolls-Royce Alert Service Bulletins listed in Table 1 of this Directive.\n\nTable 1.\n\n| AE models | Rolls-Royce service bulletin                                                             |\n| --------- | ---------------------------------------------------------------------------------------- |\n| AE 3007A  | AE 3007A-A-72-179, Revision 2, dated October 17, 2000 orRevision 3, dated June 19, 2001. |\n| AE 3007C  | AE 3007C-A-72-153, Revision 2, dated October 17, 2000 orRevision 3, dated June 19, 2001. |\n\n    2. If damage is discovered, replace the turbine wheel with a serviceable part.\n\n    3. Do not install any 2nd-stage gas-generator turbine wheel listed in Table 2 of this Directive, unless it has been inspected as specified in Requirement 1 of this Directive.\n\nNote: FAA AD 2001-17-31 Amdt 39-12423 refers.\n\nCompliance: For Requirement 1: As detailed in Table 2 of this Directive.\n\n| Models                     | With turbine wheel                                        | Mandatory                                      |\n| -------------------------- | --------------------------------------------------------- | ---------------------------------------------- |\n| All AE 3007A, and AE 3007C | 23063462, 23065892,23069116 with S/N MM183060 and before. | At next shop visit.                            |\n| All AE 3007A, and AE 3007C | 23069592 with S/N MM183060 and before.                    | At next exposure but not to exceed 12,800 CSN. |","sortOrder":1},{"sectionNumber":"Rolls Royce (Allison) Turbine Engines - ","sectionType":"part","heading":"Rolls Royce (Allison) Turbine Engines - AE 3007 Series","content":"## Rolls Royce (Allison) Turbine Engines \\- AE 3007 Series\n\nAD/AE 3007/3 (continued)\n\nFor Requirement 2: Before further flight.\n\nFor Requirement 3: From the effective date of this Directive.\n\nThis Airworthiness Directive becomes effective on 30 September 2004.\n\nBackground: This Directive is prompted by a report of a 2nd stage HPT wheel that was returned from the field with cracks in the aft bore face. The actions specified by this Directive are intended to detect and prevent early development of cracks due to low cycle fatigue of the 2nd stage HPT wheel in the aft bore face that can lead to wheel failure, power loss, and possible damage to the aeroplane.\n\nThis Directive was previously issued as AD/AE3007/1 however that Directive number was previously issued to another Directive. This Directive has been re-issued with a new number with no changes to the content.\n\n![](image.002.png)  \n\nBernard Malcolm Hole\n\nDelegate of the Civil Aviation Safety Authority 30 July 2004\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 8 September 2004.","sortOrder":2}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The Directive was re‑issued with a new number but expressly states there are no changes to content. Applicability, required inspections, replacement obligation, and compliance timings remain as previously issued (Background)."},"complexity_factors":["Technical specificity: applies only to AE3007A/C engines and particular 2nd‑stage HPT wheel part numbers and serial numbers (Applicability; Compliance table).","Multiple compliance triggers: different timing rules (next shop visit vs next exposure with a CSN cap) increase scheduling complexity (Compliance table).","Dependence on manufacturer service bulletins: inspection must follow specified Rolls‑Royce Alert Service Bulletins, including multiple revision options (Requirement 1; Table 1).","Mandatory immediate action on findings: detected damage requires replacement before further flight, creating urgent operational cost and logistics (Requirement 2).","Installation prohibition until inspected: resale/stock management affected because listed wheels may not be installed without the inspection (Requirement 3).","Cross‑reference to FAA AD and administrative re‑issuance: additional documents and record checks may be needed (Note; Background)."],"plain_english_summary":"This Airworthiness Directive requires a one‑time acid‑etch inspection of the 2nd‑stage high‑pressure turbine (HPT) wheel on Rolls‑Royce AE3007A and AE3007C engines with specified serial numbers; any cracked wheel must be replaced before further flight, and listed wheels cannot be installed unless inspected (Requirement 1–3; Compliance). It affects aircraft operators using those engines, who must pay for inspections and replacements and schedule work at the next shop visit or within the stated cycle limit to detect fatigue cracks (Background; Compliance)."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard airworthiness directive maintaining its original safety purpose. The document notes it was reissued solely to correct a numbering conflict with a previous directive, with no substantive changes to requirements."},"complexity_factors":["Short, single-purpose directive with only 3 requirements","Minimal defined terms (only standard aviation abbreviations like HPT, CSN, S/N)","Clear cross-reference to specific Rolls-Royce service bulletins for technical procedures","Simple conditional logic (if damage found → replace; if not inspected → don't install)","Straightforward compliance table with two categories based on part numbers","No nested exceptions or complex temporal calculations beyond 'next shop visit' and cycle limits"],"plain_english_summary":"This safety order requires owners/operators and MROs of Rolls‑Royce AE3007A/C engines to perform a one‑time acid‑etch inspection of the 2nd‑stage high‑pressure turbine wheel aft bore face to detect cracks from low‑cycle fatigue, and to immediately replace any damaged wheel before flight.  \n\nIt also bans installation of uninspected wheels (effective 30 Sept 2004) and sets inspection timing at the next shop visit or within 12,800 cycles for affected part numbers."},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-ae-3007-3-high-pressure-turbine-wheel","history":"/api/acts/ad-ae-3007-3-high-pressure-turbine-wheel/history","analysis":"/api/acts/ad-ae-3007-3-high-pressure-turbine-wheel/analysis","conflicts":"/api/acts/ad-ae-3007-3-high-pressure-turbine-wheel/conflicts","importantCases":"/api/acts/ad-ae-3007-3-high-pressure-turbine-wheel/important-cases","documents":"/api/acts/ad-ae-3007-3-high-pressure-turbine-wheel/documents"}}