{"id":"F2006B02155","name":"AD/AC/94 - Airspeed in Turbulence","slug":"ad-ac-94-airspeed-in-turbulence","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41385,"registerId":"commonwealth-F2006B02155-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AC/94 - Airspeed in Turbulence","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nTwin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes\n\nAD/AC/94 Airspeed in Turbulence 13/95 DM\n\nApplicability: The following aircraft models and serial numbers: Models Serial Numbers\n\n680T and 680V 1473 through 1720\n\n680W 1721 through 1850\n\n681 6001 through 6072\n\n690 11001 through 11079\n\n690A 11100 through 11344\n\n690B 11350 through 11566\n\n690C 11600 through 11735\n\n690D 15001 through 15042\n\n695 95000 through 95084\n\n695A 96000 through 96100\n\n695B 96201 through 96208\n\nRequirement: Attach a placard on the windshield centre post in accordance with the Accomplishment Instructions of Twin Commander Service Bulletin 220.\n\nA separate direction under CAR 138(3) for incorporation of the applicable flight manual amendment is being provided to Certificate of Registration holders.\n\nNote: FAA AD 95-19-18 Amdt 39-9379 refers.\n\nCompliance: Within 50 hours’ time in service after 25 October 1995.\n\nBackground: This Directive is issued in response to the recent issue of the above referenced AD by the FAA. Although no limitations have changed, the country of origin regulatory authority requires a placard and a flight manual amendment to warn the pilot to observe turbulent air penetration speeds.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive with narrow applicability. It has not expanded beyond its original purpose of mandating a cockpit placard for specific aircraft models."},"complexity_factors":["Single, specific mechanical action required (attach placard)","Limited applicability — only 15 specific aircraft model/serial number combinations affected","No conditional logic or nested exceptions","Clear compliance deadline (50 hours time in service)","Only one defined term implicitly used ('time in service')","No cross-references to other legislation beyond noting related FAA directive","Background explanation provided in plain language"],"plain_english_summary":"This AD requires owners of certain Twin Commander 500/600/700‑series aircraft to install a cockpit windshield warning placard reminding pilots to slow to specified speeds in turbulence. It affects about 15 models/serial‑number ranges and the registered owners/operators.\n\nThe placard must be fitted per the manufacturer’s Service Bulletin 220 (and the flight manual will be amended); it duplicates an FAA action and must be done within 50 flight hours after 25 October 1995."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive adopts the FAA requirement to add a placard and flight manual amendment for the listed Twin Commander aircraft without altering operating speed limits or other limitations; it aligns scope with the country‑of‑origin authority rather than expanding it."},"complexity_factors":["Narrow applicability by model and explicit serial‑number ranges (Applicability) — requires checking individual airframes.","Mandated hardware/label action: attach placard to windshield centre post per Twin Commander Service Bulletin 220 (Requirement).","Separately directed flight manual amendment to Certificate of Registration holders under CAR 138(3) (Requirement/Note) — creates dual administrative steps.","Fixed compliance deadline: within 50 hours’ time in service after 25 October 1995 (Compliance) — short operational window for affected aircraft.","Cross‑reference to FAA AD 95‑19‑18 (Note) — relies on foreign authority and an external airworthiness directive.","Substantive scope limited: Background states no change to operational limitations, so the act is a warning/documentation requirement rather than a performance restriction."],"plain_english_summary":"This airworthiness directive orders owners/operators of specified Twin Commander models and serial numbers to attach a placard to the windshield centre post and to adopt a flight‑manual amendment per Twin Commander Service Bulletin 220. Certificate of Registration holders receive a separate direction under CAR 138(3). Compliance is required within 50 hours’ time in service after 25 October 1995. CASA says the measure implements an FAA AD and does not change any operating speed limits; it increases pilot warning and documentation duties."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ac-94-airspeed-in-turbulence","history":"/api/acts/ad-ac-94-airspeed-in-turbulence/history","analysis":"/api/acts/ad-ac-94-airspeed-in-turbulence/analysis","conflicts":"/api/acts/ad-ac-94-airspeed-in-turbulence/conflicts","importantCases":"/api/acts/ad-ac-94-airspeed-in-turbulence/important-cases","documents":"/api/acts/ad-ac-94-airspeed-in-turbulence/documents"}}