{"id":"F2006B05103","name":"AD/CESSNA 185/13 Amdt 1 - Pneumatic Stall Warning System","slug":"ad-cessna-185-13-amdt-1-pneumatic-stall-warning-system","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":45087,"registerId":"commonwealth-F2006B05103-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 185/13 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 185 Series Aeroplanes\n\nAD/CESSNA 185/13\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/N0413028-1 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 3 September 1968.\n\nBackground: This amendment reflects latest Cessna Part Number change.","sortOrder":0}],"analysis":{"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a narrow, technical airworthiness directive focused specifically on Cessna 185 stall warning systems. It has not expanded beyond its original safety purpose. The amendment simply updates a part number reference."},"complexity_factors":["Single subject matter (one aircraft system)","Only 3 requirements with clear compliance deadlines","Minimal defined terms (only part numbers and aircraft model)","No cross-references to other legislation beyond a service manual citation","Straightforward conditional logic (compliance can be removed by modification)","Short document (approximately 250 words)"],"plain_english_summary":"This directive requires owners and pilots of Cessna 185s with older pneumatic stall-warning horns to ensure the horn works before flight (a simple suction test) and to display a cockpit reminder. It also allows an optional equipment upgrade (new reed assembly and screens) that removes the need for the pre-flight test once flight‑tested. \n\nIt matters because a functioning stall horn warns of low‑speed stalls; keeping it reliable prevents loss‑of‑control accidents."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment updates Cessna part numbers and clarifies installation/verification steps; it does not expand the set of affected aircraft or change the safety objective (see Background: 'reflects latest Cessna Part Number change')."},"complexity_factors":["Narrow applicability (Cessna 185 series with pneumatic stall warning lacking specified reed assemblies or screens) — Applicability paragraph","Simple, repeatable action required before every flight (pre‑flight suction check) — Requirement 1; Compliance: Before each flight","Pilot may perform and certify the check, reducing need for certified maintenance for routine compliance — Requirement 1 Note","Single administrative placard to install within a short time window (25 hours TIS) — Requirement 2; Compliance timeline","Clear technical optional compliance path by fitting specified part numbers and screens plus a flight test to remove recurring checks — Requirement 3 (part numbers and flight‑test condition)","Specified part numbers and mesh sizes increase precision but require correct parts and possible maintenance effort — Requirement 3","Short, explicit deadlines and methods limit regulatory ambiguity (Compliance section and Background line referencing part‑number change)"],"plain_english_summary":"Requires a pre‑flight suction test of the pneumatic stall‑warning on affected Cessna 185 aeroplanes, mandates a cockpit placard reminding pilots to test the system, and allows owners to eliminate the recurring checks by fitting specified replacement reed assemblies and protective screens followed by a flight test. Affects owners, pilots and maintenance personnel who must perform or certify the check or install the modification; the amendment updates Cessna part numbers and ensures the stall‑warning horn operates."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-185-13-amdt-1-pneumatic-stall-warning-system","history":"/api/acts/ad-cessna-185-13-amdt-1-pneumatic-stall-warning-system/history","analysis":"/api/acts/ad-cessna-185-13-amdt-1-pneumatic-stall-warning-system/analysis","conflicts":"/api/acts/ad-cessna-185-13-amdt-1-pneumatic-stall-warning-system/conflicts","importantCases":"/api/acts/ad-cessna-185-13-amdt-1-pneumatic-stall-warning-system/important-cases","documents":"/api/acts/ad-cessna-185-13-amdt-1-pneumatic-stall-warning-system/documents"}}