{"id":"F2006B05627","name":"AD/PA-28/70 - Fuel Drain Cover - Replacement","slug":"ad-pa-28-70-fuel-drain-cover-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135275,"registerId":"commonwealth-F2006B05627-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-28/70 - Fuel Drain Cover - Replacement","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-28 Series Aeroplanes\n\n \n\nAD/PA-28/70 Fuel Drain Cover - Replacement 11/78\n\nApplicability: Model PA-28-235 with S/Nos. 28-10003 to 28-10660. Document:  Piper SL No. 856.\n\nCompliance: Within 100 hours time in service after 31 December 1978.\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\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Based on the supplied text, the directive's scope is explicit: it applies to PA-28-235 aeroplanes with serial numbers 28-10003 to 28-10660 and mandates replacement of the fuel drain cover per Piper SL No. 856 within 100 hours time in service after 31 December 1978. The text does not indicate any change from that stated scope."},"complexity_factors":["Narrow, explicit applicability (single model and a single contiguous serial‑number range). (Applicability.)","Single, simple mandated action (replacement of a component). (Title.)","Clear, fixed compliance interval tied to flight hours with a calendar reference. (Compliance.)","Dependence on an external technical document (Piper SL No. 856) for procedural details. (Document.)","No alternative compliance routes or discretion set out in the supplied text, limiting procedural complexity. (Compliance.)","Historic date and compliance deadline (31 December 1978) may require operators to interpret retrospective applicability or record‑keeping. (Compliance; header date context.)"],"plain_english_summary":"This AD mandates replacement of the fuel‑drain cover on Piper PA‑28‑235 aircraft with serial numbers 28‑10003 to 28‑10660, using the procedure in Piper Service Letter No. 856. Owners/operators must complete the replacement within 100 hours time‑in‑service after 31 December 1978 and bear the cost; compliance is required to maintain airworthiness."},"kimi_summary":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive focused on a specific mechanical defect in a specific aircraft model. It has not expanded beyond its original narrow safety purpose."},"complexity_factors":["Single, specific mechanical requirement (replace one part)","Narrow applicability (one aircraft model, specific serial number range)","Single compliance deadline with straightforward calculation (100 hours time in service after fixed date)","No defined terms section","No cross-references to other legislation beyond basic enabling regulation (CAR 1998 Part 39)","No conditional logic, exceptions, or nested provisions","Total length: approximately 100 words of substantive content"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998.\n\n**What it requires:** Owners and operators of specific Piper PA-28-235 aircraft (serial numbers 28-10003 through 28-10660) must **replace the fuel drain cover** on their planes. The replacement must follow Piper Service Letter No. 856.\n\n**Who it affects:** Anyone who owns, operates, or maintains the affected Piper Cherokee aircraft models built within that serial number range.\n\n**When it had to be done:** Within 100 hours of flight time after 31 December 1978. *(Note: This AD is historical — the deadline passed decades ago, but the directive remains on the books as a record of required safety action.)*\n\n**Why it matters:** Fuel drain covers are critical safety components. A faulty or improperly secured cover could lead to fuel leaks, fire hazards, or engine failure. This AD addressed a specific design or manufacturing defect identified by the manufacturer (Piper) to prevent accidents."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-28-70-fuel-drain-cover-replacement","history":"/api/acts/ad-pa-28-70-fuel-drain-cover-replacement/history","analysis":"/api/acts/ad-pa-28-70-fuel-drain-cover-replacement/analysis","conflicts":"/api/acts/ad-pa-28-70-fuel-drain-cover-replacement/conflicts","importantCases":"/api/acts/ad-pa-28-70-fuel-drain-cover-replacement/important-cases","documents":"/api/acts/ad-pa-28-70-fuel-drain-cover-replacement/documents"}}