{"id":"F2006B05694","name":"AD/PA-31/108 - Aft Bulkhead, Fuselage Stn. 332.0","slug":"ad-pa-31-108-aft-bulkhead-fuselage-stn-332-0","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135483,"registerId":"commonwealth-F2006B05694-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-31/108 - Aft Bulkhead, Fuselage Stn. 332.0","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-31/108 Aft Bulkhead, Fuselage Stn. 332.0 2/85 TLX\n\nApplicability: All models PA-31P with S/Nos 31P-3 to 31P-7730012 which have achieved 1000 hours or more time in service.\n\n \n\nRequirement: Action in accordance with Piper SB No. 802.\n\n \n\nCompliance: Within 25 hours time in service after 9 January 1985 and thereafter at intervals not exceeding 200 hours time in service until either reinforcement kit, Piper P/No. 764- 983 or reinforced replacement bulkhead, Piper P/No. 45583-16 is installed.\n\n \n\nBackground: The manufacturer reports instances of cracking in the AFT fuselage bulkhead.\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":2,"scope_assessment":{"changed":false,"description":"The directive itself does not indicate any change of scope from an earlier or original intent. It straightforwardly applies to all PA-31P aircraft in the specified serial number range with 1,000 or more hours and requires inspections per Piper SB No. 802 until one of two specified reinforcement options is installed (Applicability; Requirement; Compliance)."},"complexity_factors":["Limited and specific applicability by model and serial number range (Applicability).","Clear, short compliance schedule with an immediate short deadline and fixed recurring interval (Compliance).","Dependency on an external document (Piper Service Bulletin No. 802) for the detailed inspection and corrective actions (Requirement).","Termination condition tied to installation of a specified reinforcement kit or replacement bulkhead with precise part numbers (Compliance).","No procedural complexity or multiple alternative compliance pathways set out in the text."],"plain_english_summary":"This airworthiness directive requires owners/operators of Piper PA‑31P (s/n 31P‑3 through 31P‑7730012) with 1,000+ hours to perform inspections per Piper Service Bulletin No. 802 for cracking in the aft fuselage bulkhead. Inspections must start within 25 hours after 9 Jan 1985 and repeat every 200 hours until a reinforcement kit (P/N 764‑983) or reinforced replacement bulkhead (P/N 45583‑16) is installed.\n\nOperators bear inspection and repair costs; installing the kit or replacement terminates the recurring inspection requirement."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific structural defect in a specific aircraft model. It has not expanded beyond its original purpose of mandating inspections and repairs for the aft bulkhead cracking issue."},"complexity_factors":["Single, specific aircraft model and serial number range","Straightforward applicability test (1000+ hours time in service)","Clear compliance timeline (25 hours after effective date, then 200-hour intervals)","Simple termination condition (installation of specified parts)","No cross-references to other legislation or complex defined terms","Single requirement referencing one external document (Piper SB No. 802)"],"plain_english_summary":"**What this is:** This is an Airworthiness Directive (AD) — essentially a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA) for a specific type of aircraft.\n\n**What it does:** It requires owners and operators of certain Piper PA-31P aircraft to inspect the rear bulkhead (a structural wall at the back of the fuselage) for cracks. The directive applies to specific serial numbers that have flown 1,000 hours or more.\n\n**Who must act:** Anyone who owns or operates a Piper PA-31P aircraft with serial numbers from 31P-3 to 31P-7730012 that has accumulated at least 1,000 flight hours.\n\n**What they must do:**\n- **First inspection:** Within 25 flight hours after 9 January 1985\n- **Ongoing inspections:** Every 200 flight hours thereafter\n- **Follow manufacturer's instructions:** Specifically Piper Service Bulletin No. 802\n- **Permanent fix:** Keep inspecting until you install either a reinforcement kit (part number 764-983) or a reinforced replacement bulkhead (part number 45583-16)\n\n**Why it matters:** The manufacturer reported cracks developing in this structural component. If left unchecked, this could compromise the aircraft's structural integrity and safety. The directive ensures potential cracks are caught early through repeated inspections until a permanent repair is made."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-108-aft-bulkhead-fuselage-stn-332-0","history":"/api/acts/ad-pa-31-108-aft-bulkhead-fuselage-stn-332-0/history","analysis":"/api/acts/ad-pa-31-108-aft-bulkhead-fuselage-stn-332-0/analysis","conflicts":"/api/acts/ad-pa-31-108-aft-bulkhead-fuselage-stn-332-0/conflicts","importantCases":"/api/acts/ad-pa-31-108-aft-bulkhead-fuselage-stn-332-0/important-cases","documents":"/api/acts/ad-pa-31-108-aft-bulkhead-fuselage-stn-332-0/documents"}}