{"id":"F2006B10987","name":"AD/JT8D/30 Amdt 1 - Low Pressure Turbine Inspection and Modification","slug":"ad-jt8d-30-amdt-1-low-pressure-turbine-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56575,"registerId":"commonwealth-F2006B10987-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/JT8D/30 Amdt 1 - Low Pressure Turbine Inspection and Modification","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 106 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nPratt and Whitney Turbine Engines \\- JT8D Series\n\nAD/JT8D/30\n\nAmdt 1\n\n  \nLow Pressure Turbine Inspection and Modification 2/98\n\nApplicability: JT8D-1 through \\-17R series engines.\n\nRequirement: 1. Inspect the third and fourth stage turbine blades of affected engines in accordance with the technical requirements of FAA AD 97-19-14 Amdt 39-10135.\n\nNote 1: The extent of the inspection requirements is dependent on modification/build status of individual engines.\n\n2. Modify affected engines to incorporate improved low pressure turbine containment hardware and improved No.6 bearing scavenge pump attach bracket bushings in accordance with the technical requirements of FAA AD 97-19-14 Amdt 39-10135.\n\nIncorporation of these modifications is terminating action for the inspections specified in Requirement 1 of this directive.\n\nCompliance: Effective 29 January 1998, as detailed in the requirement document.\n\nNote 2: This directive supersedes AD/JT8D/28.\n\nThis amendment becomes effective on 29 January 1998.\n\nBackground: Uncontained engine failures have occurred as a result of low pressure turbine blade and shaft fractures.\n\nThis amendment revises the original Requirement Document to reflect FAA AD 97- 19-14 in lieu of FAA AD 94-20-08. FAA AD 97-19-14 reduces the compliance period for the modifications specified in Requirement 2 for engines in which certain 4th stage low pressure turbine hubs are installed. AD/JT8D/34 also refers.\n\nThe original issue of this airworthiness directive became effective on 2 February 1995.","sortOrder":0}],"analysis":{"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"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment remains tightly focused on its original purpose: preventing uncontained low pressure turbine failures in JT8D engines. The amendment merely updates the referenced FAA directive and tightens compliance periods for specific engine configurations — it does not expand the scope beyond turbine blade inspection and containment modifications."},"complexity_factors":["Short, single-purpose document (2 main requirements)","Heavy reliance on external technical documents (FAA AD 97-19-14) — the actual inspection and modification procedures are not reproduced in the text","Conditional applicability based on engine modification/build status (Note 1)","Cross-reference to related Australian directive AD/JT8D/34","Technical aviation terminology (e.g., 'scavenge pump attach bracket bushings', 'terminating action')","Nested compliance logic: different deadlines for engines with 'certain 4th stage low pressure turbine hubs'"],"plain_english_summary":"This AD mandates inspections of third- and fourth-stage turbine blades and requires installation of improved containment hardware and bearing pump brackets on Pratt & Whitney JT8D-1 through -17R engines. It affects airlines, operators and maintenance organisations using these engines (e.g., older 727/737, DC‑9/MD‑80 types) to prevent uncontained turbine failures. Amendment 1 shortens compliance deadlines for certain hub configurations based on new FAA safety data."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"This amendment replaces the earlier FAA AD reference (94-20-08) with FAA AD 97-19-14 and reduces the compliance period for required modifications on engines fitted with certain 4th-stage low-pressure turbine hubs; it thereby narrows the timetable for affected engines while keeping the underlying inspection-and-modification obligations (Background)."},"complexity_factors":["Dependence on an external technical document (FAA AD 97-19-14) for inspection and modification procedures","Applicability across multiple JT8D variants (JT8D-1 through -17R) with differing modification/build statuses affecting inspection scope (Note 1)","Conditional terminating action: modifications end inspection obligations, creating sequencing/recordkeeping complexity (Requirement 2)","Safety-critical maintenance tasks requiring specialised skills, parts and shop resources","Amendment history and cross-references to prior and related ADs (supersedes AD/JT8D/28; refers to AD/JT8D/34)","Changed compliance timing for engines with certain 4th-stage hubs, introducing a differential compliance deadline (Background)"],"plain_english_summary":"This airworthiness directive requires operators of Pratt & Whitney JT8D-1 through -17R engines to inspect third- and fourth-stage low-pressure turbine blades and to fit improved low-pressure turbine containment hardware and No.6 bearing scavenge pump bracket bushings, following the technical steps in FAA AD 97-19-14 (Requirement 1–2). \n\nEngine owners/operators and maintenance organisations pay for and carry out the work; compliance was required by 29 January 1998, and fitting the specified modifications ends the recurring inspection obligation (Requirement 2; Compliance)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-jt8d-30-amdt-1-low-pressure-turbine-inspection-and-modification","history":"/api/acts/ad-jt8d-30-amdt-1-low-pressure-turbine-inspection-and-modification/history","analysis":"/api/acts/ad-jt8d-30-amdt-1-low-pressure-turbine-inspection-and-modification/analysis","conflicts":"/api/acts/ad-jt8d-30-amdt-1-low-pressure-turbine-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-jt8d-30-amdt-1-low-pressure-turbine-inspection-and-modification/important-cases","documents":"/api/acts/ad-jt8d-30-amdt-1-low-pressure-turbine-inspection-and-modification/documents"}}