{"id":"F2006B03788","name":"AD/BEECH 33/21 Amdt 1 - Hatshelf Soundproofing Blanket","slug":"ad-beech-33-21-amdt-1-hatshelf-soundproofing-blanket","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43384,"registerId":"commonwealth-F2006B03788-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 33/21 Amdt 1 - Hatshelf Soundproofing Blanket","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Beechcraft 33 and 35-33 (Debonair/Bonanza) Series Aeroplanes\n\n \n\nAD/BEECH 33/21\n\nAmdt 1\n\n\nHatshelf Soundproofing Blanket 3/79\n\n \n\nApplicability: All models 35-C33, E33, F33 & G33 with S/Nos. CD-814 to CD-981 & CD-983 to CD-1304;\n\n \n\nAll models 35-C33A & E33A with S/Nos. CE-235, CE-249, CE-250, CE-256, CE- 260, CE-264 to CE-268 & CE-270 to CE-279;\n\n \n\nAll models E33C & F33C with S/Nos. CJ-1 to CJ-53.\n\n \n\nRequirement: Action in accordance with Beechcraft SI No. 0694-311 Rev. 1. Compliance:  At intervals not exceeding 100 hours time in service.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2370},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"As Amendment 1 to an existing directive, this maintains the original scope regarding hatshelf soundproofing blanket maintenance for specified Beechcraft 33 series aircraft. No evidence of scope expansion beyond the original safety intent."},"complexity_factors":["Single operational requirement referencing one external technical standard (Beechcraft SI 0694-311 Rev 1)","Clear applicability limited to enumerated serial numbers of four specific model variants","Simple periodic compliance interval (100 hours time in service) with no conditional exceptions"],"plain_english_summary":"**What this is:** A mandatory safety rule (called an Airworthiness Directive) for owners and operators of specific **Beechcraft Debonair and Bonanza aircraft**.\n\n**Who is affected:** Owners of specific models (35-C33, E33, F33, G33, and variants) with particular serial numbers listed in the document — essentially certain aircraft manufactured during specific production runs.\n\n**What you must do:** You must inspect and maintain the **soundproofing blanket on the hatshelf** (the shelf area behind the rear passenger seats) following the exact instructions in **Beechcraft Service Instruction No. 0694-311 Revision 1**.\n\n**When you must do it:** Every **100 hours of flight time** (what the regulations call \"time in service\").\n\n**Why this matters:** Airworthiness directives are legally enforceable safety orders. This rule likely addresses a risk of fire, material deterioration, or interference with aircraft systems. If you don't comply, your aircraft is considered unairworthy and cannot legally fly."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-33-21-amdt-1-hatshelf-soundproofing-blanket","history":"/api/acts/ad-beech-33-21-amdt-1-hatshelf-soundproofing-blanket/history","analysis":"/api/acts/ad-beech-33-21-amdt-1-hatshelf-soundproofing-blanket/analysis","conflicts":"/api/acts/ad-beech-33-21-amdt-1-hatshelf-soundproofing-blanket/conflicts","importantCases":"/api/acts/ad-beech-33-21-amdt-1-hatshelf-soundproofing-blanket/important-cases","documents":"/api/acts/ad-beech-33-21-amdt-1-hatshelf-soundproofing-blanket/documents"}}