{"id":"F2006B05624","name":"AD/PA-28/67 - Electric Pitch Trim Switch - Modification","slug":"ad-pa-28-67-electric-pitch-trim-switch-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135272,"registerId":"commonwealth-F2006B05624-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-28/67 - Electric Pitch Trim Switch - Modification","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-28/67 Electric Pitch Trim Switch - Modification 10/77\n\nApplicability: Model PA28-180 with S/Nos. 28-4378 to 28-5858 and 28-7105001 to 28-7105122; PA-28R-180 with S/Nos. 28R- 30005 to 28R-31270 and 28R-7130001 to\n\n28R-7130005.\n\n \n\nPA-28R-200 S/Nos. 28R-35001 to 28R-35820 and 28R-7135001 to 28R-7135102. PA-28-235 S/Nos. 28-11040 to 28-11378 and 28-7110001 to 28-7110011.\n\nDocument: Piper SB No. 556.\n\n \n\nCompliance: Within 100 hours time in service after 31 October 1977.\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":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1410},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope: mandating a specific hardware modification for a defined subset of Piper PA-28 aircraft. It has not expanded beyond this safety-critical modification requirement."},"complexity_factors":["Single, unambiguous compliance action (modify switch per Service Bulletin 556)","Specific applicability limited to four aircraft models with defined serial number ranges","One external reference (Piper SB 556) without nested cross-references to other legislation","Simple time-based compliance trigger (100 hours time-in-service after fixed date)","No defined terms section or conditional exceptions"],"plain_english_summary":"**What this is:** A mandatory safety rule (Airworthiness Directive) requiring specific Piper aircraft owners to modify a cockpit control.\n\n**Who it affects:** Owners and operators of particular Piper PA-28 models (Cherokee and Arrow variants) with specific serial numbers:\n- PA-28-180, PA-28R-180, PA-28R-200, and PA-28-235 aircraft\n- Only those with serial numbers listed in the directive (e.g., 28-4378 to 28-5858 for the PA-28-180)\n\n**What you must do:** Modify the **electric pitch trim switch** (a control that adjusts the aircraft's nose-up/nose-down attitude) according to **Piper Service Bulletin No. 556**. This is a technical modification to the aircraft's trim system.\n\n**When:** Complete the modification within **100 hours of flight time** after 31 October 1977. If your aircraft was already flying before this date, you had a 100-hour \"grace period\" to comply.\n\n**Why it matters:** Airworthiness Directives are legally binding safety orders. Non-compliance means the aircraft is not considered airworthy and cannot legally fly."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-28-67-electric-pitch-trim-switch-modification","history":"/api/acts/ad-pa-28-67-electric-pitch-trim-switch-modification/history","analysis":"/api/acts/ad-pa-28-67-electric-pitch-trim-switch-modification/analysis","conflicts":"/api/acts/ad-pa-28-67-electric-pitch-trim-switch-modification/conflicts","importantCases":"/api/acts/ad-pa-28-67-electric-pitch-trim-switch-modification/important-cases","documents":"/api/acts/ad-pa-28-67-electric-pitch-trim-switch-modification/documents"}}