{"id":"F2006B05480","name":"AD/PA-23/53 - Fuel System - Placard Installation","slug":"ad-pa-23-53-fuel-system-placard-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46286,"registerId":"commonwealth-F2006B05480-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-23/53 - Fuel System - Placard Installation","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-23 (Apache and Aztec) Series Aeroplanes\n\n \n\nAD/PA-23/53 Fuel System - Placard Installation 6/72\n\nApplicability: Model PA-23-250 fitted with Met-Co-Aire wing tip fuel tanks. Requirement:  Install the following placard adjacent to the wing tip fuel tank filler points:\n\nFILL OUTBOARD MAIN TANK FIRST, THEN FILL TIP TANK THEN RE-CHECK OUTBOARD MAIN TANK QUANTITY.\n\n \n\nCompliance: Within 100 hours time in service after 30 June 1972.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1595},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The directive remains tightly scoped to its original purpose: mandating a safety placard for specific aircraft with aftermarket fuel tanks. No expansion beyond this narrow technical requirement."},"complexity_factors":["Single, clearly identified aircraft model and modification","One straightforward requirement with explicit text provided","Simple compliance deadline with no conditional exceptions","No defined terms or cross-references to other legislation"],"plain_english_summary":"**What this directive does**\n\nThis is an Airworthiness Directive (a mandatory safety notice) requiring owners of specific Piper aircraft to install a warning label near the fuel caps.\n\n**Who it affects**\n\nOwners and operators of **Piper PA-23-250** aircraft (Aztec models) that have been fitted with **Met-Co-Aire wing tip fuel tanks**.\n\n**What you must do**\n\nInstall a placard next to the wing tip fuel tank fillers that reads:\n\n> *FILL OUTBOARD MAIN TANK FIRST, THEN FILL TIP TANK THEN RE-CHECK OUTBOARD MAIN TANK QUANTITY.*\n\n**Why it matters**\n\nThe directive ensures pilots fill fuel tanks in the correct sequence. Filling the tip tank before properly checking the main tank could lead to fuel starvation or dangerous weight distribution issues during flight.\n\n**When it had to be done**\n\nWithin 100 hours of flying time after 30 June 1972 (note: this is a historical directive from 1972)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-23-53-fuel-system-placard-installation","history":"/api/acts/ad-pa-23-53-fuel-system-placard-installation/history","analysis":"/api/acts/ad-pa-23-53-fuel-system-placard-installation/analysis","conflicts":"/api/acts/ad-pa-23-53-fuel-system-placard-installation/conflicts","importantCases":"/api/acts/ad-pa-23-53-fuel-system-placard-installation/important-cases","documents":"/api/acts/ad-pa-23-53-fuel-system-placard-installation/documents"}}