{"id":"F2006B05040","name":"AD/CESSNA 180/25 Amdt 1 - Pneumatic Stall Warning System","slug":"ad-cessna-180-25-amdt-1-pneumatic-stall-warning-system","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44950,"registerId":"commonwealth-F2006B05040-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 180/25 Amdt 1 - Pneumatic Stall Warning System","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)  \nCessna 180, 182 and Wren 460 Series Aeroplanes\n\nAD/CESSNA 180/25\n\nAmdt 1\n\n  \nPneumatic Stall Warning System 6/83\n\nApplicability: All models with pneumatic stall warning systems not incorporating horn reed assembly P/N 0413483-2, P/N 0713348-1 or subsequent and protective screens over the horn bell and stall warning system opening on the left wing.\n\nRequirement: 1. Check the pneumatic stall warning system for correct operation by applying a slight suction with the mouth at the stall warning opening in the left wing. A properly functioning horn will provide a sound that is clearly audible. It may be advisable to first cover the opening with a clean piece of cloth. Cessna 100 Series Service Manual 1963 to 1967 Section 16 refers.\n\nNote: This check may be performed and certified by the pilot.\n\n    2. Install the following placard in full view of the pilot:\n\n“PRE-FLIGHT TEST THE PNEUMATIC STALL WARNING SYSTEM”.\n\n    3. The requirements of paragraphs 1 and 2 may be removed by incorporation of the following modifications. Replace the stall warning reed assembly P/N 0413028-1 with reed assembly P/N 0413483-2, P/N 0713348-1 or subsequent and install an 18 x 14 or 18 x 16 mesh screen over the exposed horn bell inside the cabin and over the left wing opening. Flight test the aircraft to assure the stall warning horn sounds at 5 to 10 knots above the stalling speed.\n\nCompliance: For para. 1 \\- Before each flight.\n\nFor para. 2 \\- Within 25 hours time in service after 5 September 1968.\n\nBackground: This amendment reflects latest Cessna Part Number change.","sortOrder":0}],"analysis":{"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a narrow, targeted airworthiness directive focused on a specific safety issue with specific aircraft models. It has not expanded beyond its original purpose of ensuring stall warning system reliability."},"complexity_factors":["Single, specific technical subject matter (pneumatic stall warning system)","Only 3 main requirements with clear compliance deadlines","Minimal defined terms (only standard aviation part numbers)","No nested conditional logic or cross-references to other legislation","Straightforward alternative compliance path (modification removes ongoing obligations)","Short document (approximately 250 words)"],"plain_english_summary":"Owners/operators of specific Cessna 180/182 and Wren 460 series aircraft with older pneumatic (suction) stall‑warning systems must test that system before every flight and install a cockpit placard reminding pilots to do so. The AD allows permanent removal of those recurring checks if the reed assembly is upgraded and inlet screens fitted.\n\nThis ensures pilots receive reliable audible stall warnings and reduces the risk of loss of control from undetected stall conditions."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The amendment updates component part numbers and prescribes either a recurring pilot check plus placard or incorporation of specified modifications (paras.1–3). The directive continues to target pneumatic stall‑warning systems on the same Cessna/Wren models; its effect is procedural and mechanical rather than expanding the classes of affected aircraft (Background and Applicability)."},"complexity_factors":["Choice between recurring pilot pre‑flight action (para.1) and a one‑time modification (para.3)","Specific part numbers required for modification; later parts also accepted (para.3)","Short compliance window for placard installation (25 hours TIS after 5 Sept 1968)","Pilot may both perform and certify the pre‑flight check (note under para.1)","Flight test requirement after modification to verify horn triggers at 5–10 kt above stall (para.3)"],"plain_english_summary":"This airworthiness directive requires operators of Cessna 180/182 and Wren 460 aeroplanes with older pneumatic stall‑warning systems either to perform a simple pre‑flight suction check of the left‑wing stall warning and display a visible placard, or to fit updated reed assemblies and protective screens plus a flight test. It updates Cessna part numbers. The rule affects pilots, owners and maintenance providers by imposing a per‑flight check unless the specified modification is installed."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-180-25-amdt-1-pneumatic-stall-warning-system","history":"/api/acts/ad-cessna-180-25-amdt-1-pneumatic-stall-warning-system/history","analysis":"/api/acts/ad-cessna-180-25-amdt-1-pneumatic-stall-warning-system/analysis","conflicts":"/api/acts/ad-cessna-180-25-amdt-1-pneumatic-stall-warning-system/conflicts","importantCases":"/api/acts/ad-cessna-180-25-amdt-1-pneumatic-stall-warning-system/important-cases","documents":"/api/acts/ad-cessna-180-25-amdt-1-pneumatic-stall-warning-system/documents"}}