{"id":"F2006B02834","name":"AD/B737/133 - Flight Deck Door Upper Decompression Panel","slug":"ad-b737-133-flight-deck-door-upper-decompression-panel","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42176,"registerId":"commonwealth-F2006B02834-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B737/133 - Flight Deck Door Upper Decompression Panel","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)  \nBoeing 737 Series Aeroplanes\n\nAD/B737/133 Flight Deck Door Upper Decompression Panel 1/2000\n\nApplicability: Model 737 series aircraft, as listed in Boeing Service Bulletin 737-52-1128, dated April 22 1999, or in Boeing Service Bulletin 737-52-1137, dated May 13 1999.\n\nRequirement: Perform detailed visual inspection in accordance with the technical requirements of FAA AD 99-22-16 Amdt 39-11394.\n\nCompliance: As specified in the Requirement document with a revised effective date of 31 December 1999.\n\nThis Airworthiness Directive becomes effective on 31 December 1999.\n\nBackground: The FAA received reports of incorrectly installed flight deck door upper decompression panels during production. An incorrectly installed panel could cause the emergency exit panel on the flight deck door to become inoperable, preventing crew members from performing essential duties during an emergency evacuation.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue safety directive focused specifically on inspecting flight deck door panels on one aircraft type. It has not expanded beyond its original narrow technical purpose."},"complexity_factors":["Very short document (under 200 words)","Only 4 operative paragraphs (Applicability, Requirement, Compliance, Background)","No defined terms section — relies entirely on external references (FAA AD and Boeing Service Bulletins)","Single, straightforward requirement: perform an inspection","No conditional logic, exceptions, or nested provisions","Cross-references are simple pointers to external technical documents rather than internal structural complexity"],"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) that requires specific repairs or inspections on certain aircraft.\n\n**What it does:** It orders airlines and aircraft owners to inspect the upper decompression panel on the flight deck (cockpit) door of Boeing 737 aircraft. The panel is a safety feature that allows the door to function as an emergency exit if needed.\n\n**Why it matters:** The US Federal Aviation Administration (FAA) discovered that some panels were installed incorrectly during manufacturing. If the panel doesn't work properly, pilots and crew could be trapped in the cockpit during an emergency evacuation — a serious safety risk.\n\n**Who must comply:** Anyone operating Boeing 737 aircraft covered by two specific Boeing service bulletins (technical notices) from April and May 1999.\n\n**What must be done:** A \"detailed visual inspection\" — a careful, methodical check using specific procedures laid out in an American safety directive (FAA AD 99-22-16). If problems are found, they must be fixed according to those same procedures.\n\n**When:** The inspection had to be completed by 31 December 1999."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD's scope remains aligned with its stated intent: to require inspection of flight deck door upper decompression panels on the Boeing 737 aircraft listed in the cited Boeing service bulletins to identify and correct incorrect production installation. The instrument does not expand or narrow the set of affected tasks or aircraft beyond those identified in the Applicability and the external documents it references."},"complexity_factors":["References external technical documents (FAA AD 99-22-16 Amdt 39-11394 and Boeing Service Bulletins 737-52-1128 and 737-52-1137) rather than setting out detailed procedures in the AD itself (Requirement; Applicability).","Applies only to aircraft identified in the Boeing service bulletins, requiring operators to check applicability against those lists (Applicability).","Mandates a technical action (detailed visual inspection) whose scope and acceptance criteria are defined in an external FAA AD, creating dependence on cross-jurisdictional material (Requirement; Compliance).","Operational complexity for affected operators in scheduling inspections and potential corrective maintenance, with implied but unspecified costs and downtime (Requirement; Compliance).","Limited discretion in the AD text for alternate means of compliance — operators must follow the referenced documents unless another approved method is arranged (Requirement; Compliance)."],"plain_english_summary":"This AD mandates that operators of certain Boeing 737s perform a detailed visual inspection of the flight deck door upper decompression panel, following FAA AD 99-22-16 and the cited Boeing service bulletins, effective 31 Dec 1999.  \n\nIt responds to reports of incorrect production installation that could render the emergency exit panel inoperable; operators must arrange and pay for inspections/repairs, CASA enforces compliance, and implementation depends on the referenced FAA/Boeing technical guidance."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b737-133-flight-deck-door-upper-decompression-panel","history":"/api/acts/ad-b737-133-flight-deck-door-upper-decompression-panel/history","analysis":"/api/acts/ad-b737-133-flight-deck-door-upper-decompression-panel/analysis","conflicts":"/api/acts/ad-b737-133-flight-deck-door-upper-decompression-panel/conflicts","importantCases":"/api/acts/ad-b737-133-flight-deck-door-upper-decompression-panel/important-cases","documents":"/api/acts/ad-b737-133-flight-deck-door-upper-decompression-panel/documents"}}