{"id":"F2006B03875","name":"AD/BEECH 36/19 - Internally Lighted Altimeter","slug":"ad-beech-36-19-internally-lighted-altimeter","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43484,"registerId":"commonwealth-F2006B03875-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 36/19 - Internally Lighted Altimeter","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 36 (Bonanza) Series Aeroplanes\n\nAD/BEECH 36/19 Internally Lighted Altimeter 10/73\n\nApplicability: All models with internally lighted altimeters supplied as spares ex Beech Wichita between 1 September 1972 and 1 August 1973 and model A36 with S/Nos. E-368 to E-460.\n\nRequirement: 1. Prior to next flight visually inspect the internally lighted altimeters. If the locking stud screw is located above and to the left of the barometric scale adjustment knob, no further inspection or replacement is necessary.\n\n2. If the locking stud screw is located below and to the right of the barometric adjustment knob, replace the instrument within 50 hours time in service after\n\n17 October 1973. Until replacement is accomplished check the altimeter prior to each flight as follows:\n\nRotate barometric scale adjustment knob while applying outward finger pressure to ensure the elevation hands do not disengage from the barometric scale.\n\nDisengagement will be readily recognised by the knob snapping outward and the elevation hands will not move when the barometric scale is rotated. If disengagement occurs, replace the altimeter with a 58-380045-3 millibars scale 35,000 feet altimeter, or an equivalent. All future altimeters will have locking stud screws above and to the left of the adjusting knob as in 1 above.\n\nNote: Until replacement altimeters are installed forward pressure should be exerted on the knob whenever changing barometric settings.\n\nCompliance: As detailed in Requirement document.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1945},"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This maintains the original 1973 scope targeting a specific manufacturing defect in specific aircraft models during a defined production period. No evidence of scope expansion beyond the original flight safety intent."},"complexity_factors":["Technical aviation terminology requiring specialized knowledge (e.g., 'time in service', 'elevation hands', 'barometric scale adjustment knob')","Conditional compliance paths based on physical positioning of a single component (locking stud screw location determines entire compliance pathway)","Specific applicability criteria combining date ranges, serial numbers, and parts provenance (supplier source)","Nested temporal requirements (immediate inspection vs. 50-hour replacement window vs. per-flight checks until replacement)"],"plain_english_summary":"This AD requires urgent checks and corrective action on certain internally lighted altimeters installed in specific Beechcraft Bonanza (36 series and listed A36 serials) produced/installed between Sept 1, 1972 and Aug 1, 1973. A design fault can let the barometric adjustment knob disengage from the altitude hands, producing false altitude indications. Owners must inspect and either replace faulty units or perform preflight checks until replacement to prevent in‑flight altitude errors."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-36-19-internally-lighted-altimeter","history":"/api/acts/ad-beech-36-19-internally-lighted-altimeter/history","analysis":"/api/acts/ad-beech-36-19-internally-lighted-altimeter/analysis","conflicts":"/api/acts/ad-beech-36-19-internally-lighted-altimeter/conflicts","importantCases":"/api/acts/ad-beech-36-19-internally-lighted-altimeter/important-cases","documents":"/api/acts/ad-beech-36-19-internally-lighted-altimeter/documents"}}