{"id":"F2006B11000","name":"AD/JT8D-200/2 - Number 4 and 5 Bearing Compartment Oil Fires","slug":"ad-jt8d-200-2-number-4-and-5-bearing-compartment-oil-fires","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56592,"registerId":"commonwealth-F2006B11000-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/JT8D-200/2 - Number 4 and 5 Bearing Compartment Oil Fires","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Pratt and Whitney Turbine Engines - JT8D-200 Series\n\n \n\nAD/JT8D-200/2 Number 4 and 5 Bearing Compartment Oil Fires 10/92\n\nApplicability: All JT8D-200 series engines not incorporating PWA SB 5514 and SB 5945. Requirement:               Action in accordance with Pratt and Whitney Service Bulletin No. 5944 Revision 2. Compliance:               Effective 17 September 1992.\n\nBackground:  This Directive has been issued to require a periodic inspection program to monitor number 4 and 5 bearing compartment oil temperature. The requirement follows advice of 28 high pressure turbine shaft fracture events, 5 of which resulted in uncontained turbine failures.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical failure mode in a specific engine series. It has not expanded beyond its original purpose of mandating temperature monitoring to prevent bearing compartment fires and turbine shaft fractures."},"complexity_factors":["Very short document (under 200 words)","Only 2 defined applicability criteria (engine series and service bulletin exclusions)","Single compliance requirement referencing an external technical document","No nested conditional logic or exceptions","Straightforward effective date with no phased implementation","Background provides clear safety rationale without legal cross-references"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for aircraft engines.\n\n**What it does:**\nIt requires owners and operators of specific Pratt & Whitney jet engines (the JT8D-200 series) to conduct regular inspections to monitor oil temperatures in the number 4 and 5 bearing compartments. These are critical parts that keep the engine's high-pressure turbine spinning smoothly.\n\n**Who it affects:**\nAnyone operating aircraft with JT8D-200 series engines that haven't already been modified according to two specific Pratt & Whitney service bulletins (SB 5514 and SB 5945). These engines are commonly used in older Boeing 727 and MD-80 series aircraft.\n\n**Why it matters:**\nThe directive was triggered by 28 incidents where the high-pressure turbine shaft actually broke — and in 5 cases, the resulting damage was \"uncontained,\" meaning flying debris escaped the engine casing. This poses serious risks to the aircraft, passengers, and people on the ground. The temperature monitoring is designed to catch problems before catastrophic failure occurs.\n\n**What must be done:**\nOperators must follow the inspection procedures laid out in Pratt & Whitney Service Bulletin No. 5944 Revision 2, and comply by 17 September 1992."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive sets a clear, targeted scope: all JT8D-200 series engines except those incorporating PWA SB 5514 and SB 5945 must follow P&W Service Bulletin No. 5944 Rev 2 for a periodic oil-temperature inspection programme. The text shows no indication that the applicability or substantive requirements were expanded or narrowed from an earlier stated intent within the instrument itself."},"complexity_factors":["Short, targeted instrument affecting a single engine family (JT8D-200) — limited substantive scope (Applicability)","Mandates compliance by reference to an external technical document (P&W Service Bulletin No. 5944 Rev 2) rather than setting full technical detail in the directive (Requirement)","Applicability carve-out for engines incorporating PWA SB 5514 and SB 5945 requires verification of modification status (Applicability)","Imposes an ongoing operational requirement (periodic inspection programme) rather than a one-off action, creating recurring compliance activity and record-keeping (Requirement)","Contains safety-history data (28 events, 5 uncontained) that informs purpose but does not itself specify technical fixes (Background)"],"plain_english_summary":"This AD requires operators of Pratt & Whitney JT8D-200 engines (except those that have incorporated P&W SBs 5514 and 5945) to implement a recurring inspection program to monitor oil temperature in the number 4 and 5 bearing compartments, carried out per Pratt & Whitney Service Bulletin No. 5944 Revision 2.\n\nIssued after 28 high‑pressure turbine shaft fractures (five uncontained), it set compliance from 17 Sep 1992 and places implementation costs and responsibilities on operators or their MROs."}},"importantCases":[],"_links":{"self":"/api/acts/ad-jt8d-200-2-number-4-and-5-bearing-compartment-oil-fires","history":"/api/acts/ad-jt8d-200-2-number-4-and-5-bearing-compartment-oil-fires/history","analysis":"/api/acts/ad-jt8d-200-2-number-4-and-5-bearing-compartment-oil-fires/analysis","conflicts":"/api/acts/ad-jt8d-200-2-number-4-and-5-bearing-compartment-oil-fires/conflicts","importantCases":"/api/acts/ad-jt8d-200-2-number-4-and-5-bearing-compartment-oil-fires/important-cases","documents":"/api/acts/ad-jt8d-200-2-number-4-and-5-bearing-compartment-oil-fires/documents"}}