{"id":"F2006B03104","name":"AD/B747/204 - Number 1 Main Entry Door Cutout","slug":"ad-b747-204-number-1-main-entry-door-cutout","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42476,"registerId":"commonwealth-F2006B03104-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B747/204 - Number 1 Main Entry Door Cutout","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 747 Series Aeroplanes\n\nAD/B747/204 Number 1 Main Entry Door Cutout 7/99\n\nApplicability: Model 747 series aircraft, line numbers 1 through 685.\n\nRequirement: Perform eddy current inspection in accordance with the technical requirements of FAA AD 99-07-03 Amdt 39-11085.\n\nNote: Accomplishment of the repair or preventative modifications specified in ASB 747-53A2414, constitutes terminating action for the repetitive inspection requirements of this Directive for that repaired/modified edge frame web and doubler.\n\nCompliance: Initial and repetitive inspection as specified in the Requirement Document with a revised effective date of 15 July 1999.\n\nThis Airworthiness Directive becomes effective on 15 July 1999.\n\nBackground: The FAA received reports of fatigue cracks found in the edge frame web and doubler at the door stop number 1 of the number 1 main entry door cutout.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard airworthiness directive with narrow, specific scope targeting a known safety defect in a defined aircraft population. It has not expanded beyond its original purpose of mandating inspection for fatigue cracks in a specific structural component."},"complexity_factors":["Very short document — approximately 150 words","Only 1 defined term implicitly referenced (line numbers)","No nested conditional logic or exceptions beyond a single terminating action clause","Single cross-reference to external FAA technical document (AD 99-07-03)","Single cross-reference to Boeing service bulletin (ASB 747-53A2414)","Straightforward applicability criteria (line numbers 1-685)","Clear compliance timeline with single effective date"],"plain_english_summary":"This is a **safety order for specific Boeing 747 aircraft**.\n\n**What it does:**\nIt requires airlines and aircraft operators to perform a special type of metal inspection called an **eddy current inspection** on a specific part of the plane — the frame around the Number 1 main entry door (the door frame structure that supports the door and keeps it sealed during flight).\n\n**Why it matters:**\nThe US aviation safety authority (FAA) found **fatigue cracks** — tiny fractures caused by repeated stress over time — in the door frame structure. These cracks could weaken the aircraft's structure and potentially cause serious safety problems if not detected and fixed.\n\n**Who it affects:**\n- **Aircraft affected:** Boeing 747 planes with \"line numbers\" (manufacturing serial numbers) 1 through 685 — essentially the earlier production models\n- **People affected:** Airlines, maintenance crews, and operators of these specific aircraft\n\n**What must be done:**\n- **Initial inspection:** Check the door frame using eddy current testing (a non-destructive method that uses electromagnetic fields to detect cracks beneath the surface)\n- **Repetitive inspections:** Keep checking this area regularly as specified in the FAA's technical document\n- **Permanent fix option:** If operators install specific repairs or modifications listed in Boeing Alert Service Bulletin 747-53A2414, they can stop doing the repetitive inspections for that repaired area\n\n**When:**\nThe inspections start from 15 July 1999, with both initial and follow-up checks required."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive maintains a narrowly targeted scope: inspection of the edge frame web and doubler at the Number 1 main entry door cutout on Boeing 747 series aircraft (line numbers 1–685). It prescribes inspections and points to a terminating repair/modification; it does not broaden applicability to other structures or aircraft models. (Applicability; Requirement; Note)"},"complexity_factors":["References and cross-references to external technical documents (FAA AD 99-07-03 and Boeing ASB 747-53A2414) which operators must obtain and follow","Technical inspection method required (eddy current), requiring specialised personnel and equipment","Repetitive inspection schedule plus an alternative terminating action (repair/modification) creating an operational decision for each operator","Applicability limited to a defined subset of aircraft (line numbers 1–685), requiring fleet-level tracking","Compliance deadlines and record‑keeping obligations implied by the directive and its referenced documents"],"plain_english_summary":"Operators of Boeing 747s (line numbers 1–685) must perform eddy‑current inspections of the edge frame web and doubler at the No.1 main entry door cutout per FAA AD 99‑07‑03, initially and at repetitive intervals (effective 15 July 1999). Completing Boeing ASB 747‑53A2414 repair/modification for that structure terminates the recurring inspections. The directive shifts inspection/repair costs and downtime to aircraft owners/operators and requires qualified personnel and equipment to detect fatigue cracks."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-204-number-1-main-entry-door-cutout","history":"/api/acts/ad-b747-204-number-1-main-entry-door-cutout/history","analysis":"/api/acts/ad-b747-204-number-1-main-entry-door-cutout/analysis","conflicts":"/api/acts/ad-b747-204-number-1-main-entry-door-cutout/conflicts","importantCases":"/api/acts/ad-b747-204-number-1-main-entry-door-cutout/important-cases","documents":"/api/acts/ad-b747-204-number-1-main-entry-door-cutout/documents"}}