{"id":"F2008L02714","name":"AD/AC/52 Amdt 1 - Pilot Compartment Side Windows - Replacement","slug":"ad-ac-52-amdt-1-pilot-compartment-side-windows-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74792,"registerId":"commonwealth-F2008L02714-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Twin Commander (Gulfstream/Rockwell/Aero","sectionType":"division","heading":"Twin Commander (Gulfstream/Rockwell/Aerocommander 500, 600 and 700) Series Aeroplanes","content":"### Twin Commander (Gulfstream/Rockwell/Aerocommander 500, 600 and 700) Series Aeroplanes\n\n| AD/AC/52 Amdt 1 | Pilot Compartment SideWindows - Replacement | 8/2008 |\n| --------------- | ------------------------------------------- | ------ |\n\n| Applicability: | All model 690A aeroplanes with S/Nos. 11100 to 11197.                                                                                                                                                                        |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Unless previously accomplished, remove openable pilot and co-pilot side windows and replace with windows with part number 360012-501 in accordance with Rockwell Service Bulletin (SB) No. 143.Note: FAA AD 74-20-12 refers. |\n| Compliance:    | Unless already accomplished in accordance with the original issue of this AD, within 100 hours time in service (TIS) after 31 July 2008.                                                                                     |\n|                | This Amendment becomes effective on 31 July 2008.                                                                                                                                                                            |\n| Background:    | This amendment includes changes to the applicability as contained in FAA AD74-20-12 and Rockwell SB No. 143. There has been a history of cracking of the openable pilot’s and co-pilot’s side windows.                       |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n20 June 2008","sortOrder":0},{"sectionNumber":"AD/AC/52 Amdt 1","sectionType":"part","heading":"AD/AC/52 Amdt 1","content":"## AD/AC/52 Amdt 1","sortOrder":1},{"sectionNumber":"Pilot Compartment SideWindows - Replacem","sectionType":"part","heading":"Pilot Compartment SideWindows - Replacement","content":"## Pilot Compartment Side  \nWindows - Replacement","sortOrder":2},{"sectionNumber":"8/2008","sectionType":"part","heading":"8/2008","content":"## 8/2008","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment narrows the scope rather than expands it. The background notes this amendment 'includes changes to the applicability' based on the FAA directive and manufacturer service bulletin, suggesting it refines which specific aircraft are affected rather than broadening the directive's purpose."},"complexity_factors":["Single, specific aircraft model and serial number range (model 690A, S/Nos. 11100-11197)","One clear action required (window replacement with specified part number)","Single compliance deadline with straightforward exception (already accomplished)","Minimal cross-referencing (only to FAA AD 74-20-12 and Rockwell SB No. 143 for technical procedure)","No nested conditions, exceptions, or defined terms section","Document appears to be a scanned/OCR'd version with formatting artifacts and repeated headers"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It requires owners and operators of specific **Twin Commander aircraft** (model 690A, serial numbers 11100 to 11197) to replace the pilot and co-pilot's openable side windows with a specific, improved design.\n\n**Why this matters:** The original windows have a history of **cracking**, which could compromise cockpit integrity and flight safety. The directive mandates replacing them with windows bearing part number **360012-501**, following the manufacturer's service instructions (Rockwell Service Bulletin No. 143).\n\n**Who must comply:** Anyone operating the affected aircraft who hasn't already made this change.\n\n**Deadline:** Within **100 hours of flight time** after 31 July 2008, unless already done under the original version of this directive.\n\n**Key point:** This is not optional — compliance is legally required for these aircraft to remain airworthy in Australia."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The amendment updates the applicability from the earlier material by specifying Model 690A serial numbers 11100–11197 and incorporates changes aligned with FAA AD 74‑20‑12 and Rockwell SB No. 143. It fixes the compliance deadline (100 hours TIS after 31 July 2008) and makes replacement mandatory for affected aircraft; these adjustments alter who is captured by the requirement and set a short mandatory compliance window."},"complexity_factors":["Narrow, explicit applicability limited to Model 690A S/N 11100–11197 (low scope breadth)","Single, clearly specified action: replace openable pilot and co‑pilot side windows with P/N 360012‑501 (low procedural complexity)","Short compliance window of 100 hours TIS from 31 July 2008 (scheduling and operational disruption risk)","Mandates compliance in accordance with Rockwell SB No. 143 and references FAA AD 74‑20‑12 (dependency on external technical documents)","Costs borne by aircraft owners/operators (parts, labour, aircraft downtime)","Administrative tasks: maintenance records, release-to-service paperwork and possible airworthiness approvals (moderate compliance burden)","Potential parts availability and logistics issues for affected serial numbers"],"plain_english_summary":"This amendment requires owners/operators of Twin Commander 690A aeroplanes (serial numbers 11100–11197) to remove the openable pilot and co‑pilot side windows and fit replacement windows, part number 360012‑501, in accordance with Rockwell Service Bulletin No. 143. The work must be done within 100 flight hours (time in service) after 31 July 2008. The stated purpose is to address a history of cracking in those windows; operators bear the cost and must schedule maintenance to meet the deadline."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-ac-52-amdt-1-pilot-compartment-side-windows-replacement","history":"/api/acts/ad-ac-52-amdt-1-pilot-compartment-side-windows-replacement/history","analysis":"/api/acts/ad-ac-52-amdt-1-pilot-compartment-side-windows-replacement/analysis","conflicts":"/api/acts/ad-ac-52-amdt-1-pilot-compartment-side-windows-replacement/conflicts","importantCases":"/api/acts/ad-ac-52-amdt-1-pilot-compartment-side-windows-replacement/important-cases","documents":"/api/acts/ad-ac-52-amdt-1-pilot-compartment-side-windows-replacement/documents"}}