{"id":"F2006B04029","name":"AD/BEECH 55/83 - Outflow/Safety Valve","slug":"ad-beech-55-83-outflow-safety-valve","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43638,"registerId":"commonwealth-F2006B04029-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 55/83 - Outflow/Safety Valve","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nBeechcraft 55, 58 and 95-55 (Baron) Series Aeroplanes\n\nAD/BEECH 55/83 Outflow/Safety Valve 3/98\n\nApplicability: Model 58P and 58PA aircraft, serial numbers TJ-3 through TJ-497.\n\nRequirement: Inspect and if necessary replace the outflow/safety valve in accordance with the procedures detailed in Beech SB 2484 Rev 1 dated October 1995.\n\nNo person shall install on any aircraft any Outflow/Safety Valve found to be unserviceable in accordance with this directive.\n\nNote: FAA AD 97-25-01 Amdt 39-10224 refers.\n\nCompliance: Within 200 hours’ time in service or 4 months, whichever occurs first, from the effective date of this directive.\n\nThis airworthiness directive becomes effective on 26 February 1998.\n\nBackground: Manufacturing problems with the safety valve may cause a rapid decompression of the aircraft should a valve failure occur.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive imposes a targeted maintenance requirement on a defined set of aircraft to address a specified manufacturing defect risk. It does not broaden the set of affected aircraft, create ongoing reporting obligations, change operational permissions, or add new regulatory categories. The scope remains the corrective, one-time inspection/replacement action described in the instrument (Applicability; Requirement; Compliance; Background)."},"complexity_factors":["Narrow applicability limited to Model 58P and 58PA, serial numbers TJ-3 through TJ-497 (Applicability)","Single, discrete technical action: inspect and replace the outflow/safety valve if necessary (Requirement)","References an external document for procedure (Beech SB 2484 Rev 1), creating a dependency on that document for technical steps (Requirement)","Clear compliance window (200 hours or 4 months) reduces scheduling ambiguity but imposes a fixed timeline (Compliance)","Prohibition on installing unserviceable valves adds a compliance constraint affecting parts procurement and maintenance decisions (\"No person shall install...\")","Cross-reference to FAA AD adds contextual regulatory linkage but does not expand procedural requirements in this text (Note)"],"plain_english_summary":"A one‑time mandatory inspection (and replacement if unserviceable) of the outflow/safety valve is required for Beechcraft Baron 58P/58PA serials TJ‑3 through TJ‑497 to address manufacturing defects that risk rapid decompression. Work must follow Beech Service Bulletin 2484 Rev 1 and be completed within 200 flight hours or 4 months of the 26 Feb 1998 effective date; owners/operators pay costs. Installing a valve found unserviceable is prohibited."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete airworthiness directive addressing a specific safety defect in specific aircraft models. It has not expanded beyond its original purpose of addressing the outflow/safety valve manufacturing defect."},"complexity_factors":["Very short document (under 200 words)","Only 2 defined applicability criteria (model numbers and serial number range)","Single, unambiguous compliance requirement with clear reference to manufacturer service bulletin","No nested exceptions or conditional logic","Simple binary compliance test (inspect and replace if necessary)","Straightforward effective date and compliance period calculation"],"plain_english_summary":"This is a **safety order for specific Beechcraft Baron aircraft**.\n\n**What it does:**\n- Requires owners and operators of certain pressurised Beechcraft Baron models (58P and 58PA) to inspect a specific part called the **outflow/safety valve** — a component that helps regulate cabin pressure.\n- If the valve is faulty, it must be replaced.\n- Bans anyone from installing a faulty valve on any aircraft.\n\n**Who it affects:**\n- Owners and operators of Beechcraft Baron model 58P and 58PA aircraft with serial numbers TJ-3 through TJ-497.\n- Maintenance engineers and repair stations working on these aircraft.\n\n**Why it matters:**\n- A manufacturing defect in these valves could cause **rapid decompression** — a dangerous sudden loss of cabin pressure that can incapacitate crew and passengers.\n- The directive gives operators a deadline (200 flight hours or 4 months, whichever comes first) to complete the inspection and any necessary repairs.\n\n**Key deadline:** The work must be done by 26 February 1998, or within 200 hours of flight time or 4 months after that date — whichever happens first."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-55-83-outflow-safety-valve","history":"/api/acts/ad-beech-55-83-outflow-safety-valve/history","analysis":"/api/acts/ad-beech-55-83-outflow-safety-valve/analysis","conflicts":"/api/acts/ad-beech-55-83-outflow-safety-valve/conflicts","importantCases":"/api/acts/ad-beech-55-83-outflow-safety-valve/important-cases","documents":"/api/acts/ad-beech-55-83-outflow-safety-valve/documents"}}