{"id":"F2006B05740","name":"AD/PA-31/36 - Elevator Control Tube - Inspection","slug":"ad-pa-31-36-elevator-control-tube-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135558,"registerId":"commonwealth-F2006B05740-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-31/36 - Elevator Control Tube - Inspection","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 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Piper PA-31 Series Aeroplanes\n\n \n\nAD/PA-31/36 Elevator Control Tube - Inspection 2/75\n\nApplicability: All models PA-31 and PA-31-300 with S/Nos. 31-1 to 31-7401248; and PA-31-350 with S/Nos. 31-5001 to 31-7405242 and 31-7405400 to 31-7405462.\n\n \n\nDocument: Piper SB No. 433.\n\n \n\nCompliance: Within 100 hours time in service after 28 February 1975.\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\n \n\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD’s scope is limited to inspection of the elevator control tube on the listed PA-31 series aircraft by serial number, using the referenced Piper Service Bulletin. The supplied text defines applicability and a single compliance requirement; there is no indication within the supplied instrument that the AD’s scope has been altered from an earlier or original version."},"complexity_factors":["Narrow, specific applicability by model and serial number reduces scope complexity (\"Applicability\").","Single required action (inspection) with a single, clear compliance window reduces procedural complexity (\"Compliance\").","Required procedure is not contained in the AD and is delegated to Piper SB No. 433, adding dependency on an external document and interpretive burden (\"Document: Piper SB No. 433\").","No corrective actions or acceptance criteria are stated in the AD text, creating uncertainty about follow-up steps and potential costs.","The compliance deadline is tied to a calendar date plus flight-hours metric (100 hours after 28 February 1975), which can complicate scheduling for operators.","Vintage timeframe (1975 date in the AD) may require owners to locate older service documentation or parts, adding practical implementation difficulty."],"plain_english_summary":"This AD requires owners/operators of specified Piper PA‑31 series aircraft (listed serial ranges) to inspect the elevator control tube per Piper Service Bulletin No. 433, to be completed within 100 hours time in service after 28 February 1975. Issued by CASA, the directive mandates the inspection procedure be sourced from the manufacturer; operators bear the cost, must obtain the SB, schedule and perform the inspection, and carry out any follow‑on maintenance the SB or inspection requires."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive issued in 1975 (as indicated by '2/75' in the reference number). It has not expanded beyond its original purpose of mandating a specific inspection on specific aircraft. The scope remains precisely limited to the elevator control tube inspection for the identified Piper aircraft models."},"complexity_factors":["Very short document (approximately 150 words)","Only 4 defined elements: applicability (aircraft models/serial numbers), document reference, compliance deadline, and the specific component","No cross-references to other legislation or regulations beyond the parent Civil Aviation Regulations 1998","Single, clear compliance action with unambiguous deadline","No conditional logic, exceptions, or nested provisions","Straightforward applicability criteria based on aircraft model and serial number"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It requires owners and operators of specific **Piper PA-31 series aircraft** to inspect the **elevator control tube** (a critical component that helps control the plane's pitch, or up-and-down movement).\n\n**Who it affects:**\n- Owners and operators of Piper PA-31, PA-31-300, and PA-31-350 aircraft with specific serial numbers (roughly those built up to early 1974).\n\n**What they must do:**\n- Inspect the elevator control tube within **100 hours of flying time** after 28 February 1975.\n- Follow the procedures in **Piper Service Bulletin No. 433** (the manufacturer's official technical instructions).\n\n**Why it matters:**\nAirworthiness Directives are legally binding. If you don't comply, you cannot fly the aircraft. This particular AD was issued to address a potential safety defect in the elevator control system that could affect the pilot's ability to control the aircraft safely."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-36-elevator-control-tube-inspection","history":"/api/acts/ad-pa-31-36-elevator-control-tube-inspection/history","analysis":"/api/acts/ad-pa-31-36-elevator-control-tube-inspection/analysis","conflicts":"/api/acts/ad-pa-31-36-elevator-control-tube-inspection/conflicts","importantCases":"/api/acts/ad-pa-31-36-elevator-control-tube-inspection/important-cases","documents":"/api/acts/ad-pa-31-36-elevator-control-tube-inspection/documents"}}