{"id":"F2006B05655","name":"AD/PA-30/13 Amdt 1 - Pitch Trim Switch - Replacement","slug":"ad-pa-30-13-amdt-1-pitch-trim-switch-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135349,"registerId":"commonwealth-F2006B05655-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-30/13 Amdt 1 - Pitch Trim Switch - 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-30 & 39 (Twin Comanche) Series Aeroplanes\n\n \n\nAD/PA-30/13\n\nAmdt 1\n\n\nPitch Trim Switch - Replacement 2/77\n\n \n\nApplicability: Model PA-30 with S/Nos. 30-1717 and 30-1745 to 30-2000 and all model PA-39 with S/Nos. 39-1 to 39-155 fitted with rocker type switch on pilot’s control wheel.\n\n \n\nDocument: 1. Piper SB No. 527; or FAA AD 77-09-10. Compliance:  Within 100 hours time in service after 28 February 1977.\n\nNote: Aircraft complying with previous issues of this Directive, satisfy this issue of the Directive.\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":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a narrow, targeted safety directive focused on a specific mechanical defect in specific aircraft models. Amendment 1 appears to be a minor update (likely clarifying applicability or compliance credit for previously compliant aircraft) rather than an expansion of scope. The original intent — mandating replacement of a faulty pitch trim switch — remains unchanged."},"complexity_factors":["Very short document (approximately 150 words of substantive content)","Only 2 defined applicability criteria (aircraft model and serial number ranges)","Single compliance action required (switch replacement)","Simple temporal compliance trigger (100 hours time in service after fixed date)","No nested exceptions or conditional logic","Only 2 reference documents cited (Piper Service Bulletin 527 and FAA AD 77-09-10)","One straightforward grandfathering clause (previous compliance satisfies current version)"],"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). ADs are legally binding instructions that aircraft owners and operators must follow to fix unsafe conditions in aircraft.\n\n**What it requires:** Owners of specific **Piper PA-30 (Twin Comanche)** and **PA-39** aircraft must **replace the pitch trim switch** on the pilot's control wheel. The original \"rocker type\" switch must be swapped out for a safer alternative.\n\n**Who it affects:** \n- **PA-30 models** with serial numbers 30-1717 and 30-1745 through 30-2000\n- **All PA-39 models** with serial numbers 39-1 through 39-155\n- Only aircraft fitted with the rocker-type switch on the pilot's control wheel\n\n**Why it matters:** Faulty pitch trim switches can cause dangerous flight control problems. The trim system adjusts the aircraft's nose position (up or down) to maintain stable flight without constant pilot pressure on the controls. A malfunction here could lead to loss of control.\n\n**Compliance deadline:** Aircraft operators had to complete this replacement within **100 hours of flight time** after 28 February 1977.\n\n**Good news for compliant aircraft:** If an aircraft already met earlier versions of this directive, it automatically satisfies this amended version (Amendment 1) — no need to do it again."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This instrument is labelled as Amendment 1 to AD/PA‑30/13 (Amdt 1). The amendment reiterates a mandatory replacement requirement for the rocker‑type pitch trim switch on identified PA‑30 and PA‑39 serial numbers and specifies the compliance method and deadline (Applicability; Document; Compliance). The directive explicitly preserves prior compliance by stating that aircraft which complied with earlier issues of the Directive satisfy this amended issue (Note). The text does not set out the earlier version’s text, so while the instrument is an amendment, it both imposes the replacement requirement as stated and confirms that earlier compliance continues to count toward this obligation."},"complexity_factors":["Narrow, specific applicability limited to particular models and serial numbers and a particular switch type (Applicability).","Clear, short compliance deadline measured in aircraft hours from a calendar date (Compliance).","Mandatory reliance on external technical documents (Piper SB No. 527 or FAA AD 77‑09‑10) to determine the exact replacement procedure (Document).","Note preserving prior compliance reduces rework but requires operators to check historical compliance records (Note).","Directive text does not specify who must carry out the work, record‑keeping details, or enforcement mechanisms, creating potential operational ambiguity.","Dated compliance deadline (100 hrs after 28 February 1977) makes the requirement time‑sensitive relative to the date stated (Compliance)."],"plain_english_summary":"The directive mandates replacing a rocker‑type pitch‑trim switch on the pilot’s control wheel of specified Piper PA‑30 and PA‑39 aeroplanes (listed by serial number), using the procedures in Piper Service Bulletin No. 527 or FAA AD 77‑09‑10, within 100 hours TIS after 28 Feb 1977. Owners/operators of affected aircraft bear the cost; aircraft already compliant under earlier issues are treated as compliant."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-30-13-amdt-1-pitch-trim-switch-replacement","history":"/api/acts/ad-pa-30-13-amdt-1-pitch-trim-switch-replacement/history","analysis":"/api/acts/ad-pa-30-13-amdt-1-pitch-trim-switch-replacement/analysis","conflicts":"/api/acts/ad-pa-30-13-amdt-1-pitch-trim-switch-replacement/conflicts","importantCases":"/api/acts/ad-pa-30-13-amdt-1-pitch-trim-switch-replacement/important-cases","documents":"/api/acts/ad-pa-30-13-amdt-1-pitch-trim-switch-replacement/documents"}}