{"id":"F2006B03764","name":"AD/BEECH 300/10 - Pressurisation Control System Pneumatic Tubing Inspection","slug":"ad-beech-300-10-pressurisation-control-system-pneumatic-tubing-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43360,"registerId":"commonwealth-F2006B03764-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 300/10 - Pressurisation Control System Pneumatic Tubing Inspection","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)  \nBeechcraft 300 Series Aeroplanes\n\nAD/BEECH 300/10 Pressurisation Control System\n\nPneumatic Tubing Inspection\n\n  \n2/98\n\nApplicability: All Beech 300 series aircraft with serial numbers FA-1 through FA 230 and FF-1 through FF-19, FL-1 through FL-154 and FM-1 through FM-9 and FN-1.\n\nRequirement: Inspect and re-route the environmental air conditioning and pressurisation control system pneumatic tubing in accordance with Raytheon Aircraft Mandatory SB 2676 dated January, 1997.\n\nNote: FAA AD 97-23-17 Amdt 39-10207 and DGAC AD 97-353-(AB) refers.\n\nCompliance: Unless previously carried out at the next schedule inspection but no later than the next 200 hours time in service from the effective date of this Directive.\n\nThis airworthiness directive becomes effective on 29 January 1998.\n\nBackground: This directive being raised on receipt of FAA AD and advice that when a pilot requested a passenger to open the cabin door a passenger was injured when ejected from the aircraft onto the tarmac.\n\nSubsequent investigation by the manufacturer confirmed that heat from the co pilot’s foot warmer outlet and associated plumbing can soften the plastic pressurisation control system pneumatic tubing sufficiently to cause permanent collapse when the line is subject to vacuum. This will result in loss of vacuum to the outflow/safety valves and this could prevent depressurisation of the aircraft. If the cabin door is operated with the aircraft partially pressurised injury to passengers and/or ground personnel may occur.\n\nThe de-icing indicator pneumatic tubing also has the potential for heat damage from the co-pilot’s foot warmer. This tubing could rupture rendering the de-icing indicator inoperative.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard Airworthiness Directive (AD) — a targeted safety instrument with narrow, specific purpose. It has not expanded beyond its original intent of addressing the specific heat-damage tubing issue in identified aircraft."},"complexity_factors":["Single, specific mechanical requirement with clear reference to manufacturer bulletin","Limited applicability — only 4 defined serial number ranges","Simple compliance deadline: next inspection OR 200 hours","No nested exceptions, conditional logic, or cross-references to other legislation beyond noting related FAA and French directives","Background narrative longer than the actual legal requirement"],"plain_english_summary":"This safety order requires owners/operators of certain Beech 300-series aeroplanes to inspect and reroute plastic air tubes in the cabin pressure control and de‑icing indicator systems because heat from the co‑pilot’s foot warmer can melt tubing. A collapsed tube can prevent proper depressurisation and, if a door is opened while pressurised, has caused passenger ejection and injury.\n\nAffected aircraft (specific serial numbers) must comply with Service Bulletin 2676 at the next inspection or within 200 flight hours."},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The Directive implements the FAA-referenced corrective action and Raytheon SB for the same set of Beech 300 serial numbers and systems. It confines obligations to inspecting and re-routing listed pneumatic tubing with the same compliance window (next scheduled inspection or within 200 hours). There is no expansion or contraction of the affected aircraft or required remedy beyond the manufacturer/FAA recommendations described in the text."},"complexity_factors":["Limited technical action: single inspection and rerouting task (low procedural complexity).","Narrow applicability: specific Beech 300 serial-number range reduces scope but requires accurate fleet identification.","Dependence on external document: mandatory compliance references Raytheon Service Bulletin 2676 (operators must obtain and follow that SB).","Compliance timing tied to operator maintenance schedule (next inspection or within 200 hours) introduces scheduling coordination.","Safety-critical consequence: failure modes involve pressurisation and potential injury, requiring competent maintenance personnel.","Cross-reference to foreign airworthiness directives (FAA AD and DGAC noted) increases regulatory provenance but no additional domestic requirements are specified."],"plain_english_summary":"This airworthiness directive requires owners/operators of specified Beech 300 series aeroplanes (listed serial numbers) to inspect and re-route environmental air‑conditioning and pressurisation pneumatic tubing in accordance with Raytheon Mandatory Service Bulletin 2676. Compliance is at the next scheduled inspection or within 200 flight‑hours. It responds to heat damage from the co‑pilot’s foot‑warmer that can soften or collapse tubing, causing loss of vacuum to outflow/safety valves (risking injury if a partially pressurised door is opened) and possible failure of the de‑icing indicator."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-300-10-pressurisation-control-system-pneumatic-tubing-inspection","history":"/api/acts/ad-beech-300-10-pressurisation-control-system-pneumatic-tubing-inspection/history","analysis":"/api/acts/ad-beech-300-10-pressurisation-control-system-pneumatic-tubing-inspection/analysis","conflicts":"/api/acts/ad-beech-300-10-pressurisation-control-system-pneumatic-tubing-inspection/conflicts","importantCases":"/api/acts/ad-beech-300-10-pressurisation-control-system-pneumatic-tubing-inspection/important-cases","documents":"/api/acts/ad-beech-300-10-pressurisation-control-system-pneumatic-tubing-inspection/documents"}}