{"id":"F2006B03917","name":"AD/BEECH 400/15 - Outflow/Safety Valve","slug":"ad-beech-400-15-outflow-safety-valve","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43526,"registerId":"commonwealth-F2006B03917-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 400/15 - Outflow/Safety Valve","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 400 Series Aeroplanes\n\n \n\nAD/BEECH 400/15 Outflow/Safety Valve 12/96\n\nApplicability: All model 400 and 400A series aircraft equipped with outflow/safety valve P/N 103570-25 or -27 and with S/N as listed in the Requirement Document.\n\n \n\nRequirement: Unless previously carried out, action in accordance with Allied Signal SB 103570-21-4012 R1 dated May 30, 1995.\n\n \n\nNote: FAA AD 96-17-10 Amdt 39-9719 refers.\n\n \n\nCompliance: Prior to 30 March 1998.\n\n \n\nBackground:  The manufacturer has reported cracking of the outflow/safety valves. This has resulted in several valve failures which could result in a rapid decompression of the aircraft cabin.\n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive preserves the original scope as set out in the text: it applies to specific Beechcraft 400/400A aircraft fitted with the listed outflow/safety valve part numbers and serial numbers, and requires action per the Allied Signal service bulletin by a fixed compliance date. No expansion or narrowing of scope is indicated within the provided text."},"complexity_factors":["Narrow, specific applicability limited to model 400/400A with particular valve P/Ns and serial numbers (Applicability)","Mandatory action is specified by reference to an external technical document (Allied Signal service bulletin) rather than detailed in the directive (Requirement)","Single fixed compliance deadline (Compliance) reduces procedural complexity but concentrates scheduling pressure","Technical nature of the required maintenance action requires licensed maintenance organisations or qualified personnel","Limited statutory discretion in the directive itself — enforcement and interpretation rely on CASA and the referenced SB"],"plain_english_summary":"This airworthiness directive requires owners/operators of certain Beechcraft 400/400A aeroplanes fitted with specific Allied Signal outflow/safety valves (P/N 103570-25 or -27, listed serials) to carry out the corrective actions in Allied Signal Service Bulletin 103570-21-4012 R1 by 30 March 1998.\n\nIt responds to reported valve cracking and failures that could cause rapid cabin decompression; operators fund and schedule the mandated inspections/repairs/replacements, and maintenance organisations must perform the work per the bulletin."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive addressing a specific mechanical defect. It has not expanded beyond its original purpose of mandating inspection/replacement of faulty outflow valves on specific aircraft."},"complexity_factors":["Single, specific mechanical issue (cracked valves)","Clear applicability criteria (specific aircraft models, part numbers, and serial numbers)","Single compliance action (follow one referenced service bulletin)","Fixed deadline with no conditional extensions or exceptions","No defined terms section — uses standard aviation terminology","Short document (approximately 150 words of substantive content)","Only one cross-reference (to the FAA AD for correlation)"],"plain_english_summary":"**What this is:** This is an Airworthiness Directive (AD) — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). Think of it like a compulsory recall notice, but for aircraft parts rather than cars.\n\n**What it does:** It requires owners and operators of specific Beechcraft 400 series aeroplanes to inspect or replace certain outflow/safety valves (parts that regulate cabin pressure) before 30 March 1998. The valves in question have part numbers 103570-25 or 103570-27 and specific serial numbers listed in a separate technical document.\n\n**Who must act:** Anyone who owns or operates a Beechcraft 400 or 400A aircraft with the affected valves. This includes airlines, charter companies, and private owners.\n\n**Why it matters:** The manufacturer found cracks in these valves that caused several failures. A failed valve could cause **rapid decompression** — where the cabin suddenly loses pressure at altitude, which is extremely dangerous for everyone on board. This directive prevents that catastrophic failure.\n\n**What must be done:** Follow the technical instructions in Allied Signal Service Bulletin 103570-21-4012 Revision 1 (dated 30 May 1995). This is a manufacturer-issued repair guide. The work must be completed by the deadline unless it was already done.\n\n**Key point:** This is not optional. Non-compliance means the aircraft cannot legally fly."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-400-15-outflow-safety-valve","history":"/api/acts/ad-beech-400-15-outflow-safety-valve/history","analysis":"/api/acts/ad-beech-400-15-outflow-safety-valve/analysis","conflicts":"/api/acts/ad-beech-400-15-outflow-safety-valve/conflicts","importantCases":"/api/acts/ad-beech-400-15-outflow-safety-valve/important-cases","documents":"/api/acts/ad-beech-400-15-outflow-safety-valve/documents"}}