{"id":"F2006B02936","name":"AD/B737/36 - Cabin Door Blowout Panels","slug":"ad-b737-36-cabin-door-blowout-panels","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42278,"registerId":"commonwealth-F2006B02936-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B737/36 - Cabin Door Blowout Panels","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)  Boeing 737 Series Aeroplanes\n\n \n\nAD/B737/36 Cabin Door Blowout Panels 4/90\n\nApplicability: 737 Aircraft line position 1 through 1587.\n\n \n\nRequirement: Action in accordance with Boeing SB 737-52A1105 Rev. 2.\n\n \n\nNote: FAA AD 89-04-03 refers.\n\n \n\nCompliance: Prior to 31 July 1990.\n\n \n\nBackground: Country of origin AD. Improper use of sealants on blowout panels in the control (cockpit) cabin door could preclude proper operation of blowout panels if a pressure differential greater than 1.5 P.S.I occurred between passenger cabin and control cabin. As a result damage to control cabin floor might occur, with possible interference of control cables.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive addressing a specific manufacturing defect. It has not expanded beyond its original purpose of ensuring blowout panel functionality on early 737s."},"complexity_factors":["Very short document (under 200 words)","Only 4 operative provisions: applicability, requirement, note, and compliance","Single cross-reference to Boeing Service Bulletin and FAA AD","No defined terms section","No conditional logic or nested exceptions","Straightforward command structure: identify aircraft, do the action, by the deadline"],"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) for specific Boeing 737 aircraft.\n\n**What it does:** It requires airlines and aircraft operators to inspect and fix a problem with the cockpit door on certain Boeing 737 planes. Specifically, the \"blowout panels\" — emergency pressure-release panels built into the cockpit door — may have been improperly sealed with the wrong type of sealant. If these panels can't open properly during a rapid pressure change (more than 1.5 PSI difference between the passenger cabin and cockpit), the cockpit floor could be damaged, potentially snagging or interfering with the control cables that run beneath it.\n\n**Who it affects:** Operators of Boeing 737 aircraft with \"line positions\" (manufacturing serial numbers) 1 through 1587 — essentially early-production 737s up to a certain point in 1990.\n\n**What must be done:** Operators must follow the instructions in Boeing Service Bulletin 737-52A1105 Revision 2 to correct the sealant problem.\n\n**When:** The fix had to be completed before 31 July 1990.\n\n**Why it matters:** This prevents a potentially catastrophic scenario where a pressure imbalance could damage flight controls, compromising the pilots' ability to fly the aircraft safely."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The provided text sets a specific, limited scope (Boeing 737 line positions 1–1587) and requires compliance with a named Boeing service bulletin by a concrete deadline. The document does not indicate any departure from the stated applicability or requirements, so there is no evidence in the text that the scope has changed from the instrument's expressed intent (Applicability; Requirement; Compliance)."},"complexity_factors":["Narrow, clearly defined applicability (Boeing 737 line positions 1–1587) reduces scope complexity (Applicability).","Reliance on an external technical document (Boeing SB 737-52A1105 Rev.2) for required actions adds procedural dependence on non‑statutory text (Requirement).","Fixed compliance deadline creates operational scheduling pressure but not ongoing regulatory complexity (Compliance).","Technical subject matter (sealant application and blowout panel operation under >1.5 psi differential) requires specialist maintenance expertise rather than legal interpretation (Background).","Cross‑reference to FAA AD provides additional background but does not change the AD's mandatory requirement (Note)."],"plain_english_summary":"This AD requires operators of Boeing 737s (line positions 1–1587) to carry out the maintenance in Boeing Service Bulletin 737‑52A1105 Revision 2 by 31 July 1990. It’s prompted by unsafe sealant application that can prevent cockpit blowout panels from operating under >1.5 psi, risking floor damage and control‑cable interference. Operators must comply and bear the inspection/repair costs; the AD aligns with the FAA."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b737-36-cabin-door-blowout-panels","history":"/api/acts/ad-b737-36-cabin-door-blowout-panels/history","analysis":"/api/acts/ad-b737-36-cabin-door-blowout-panels/analysis","conflicts":"/api/acts/ad-b737-36-cabin-door-blowout-panels/conflicts","importantCases":"/api/acts/ad-b737-36-cabin-door-blowout-panels/important-cases","documents":"/api/acts/ad-b737-36-cabin-door-blowout-panels/documents"}}