{"id":"F2005L02819","name":"AD/B747/335 - Station 980 Upper Deck Floor Beam","slug":"ad-b747-335-station-980-upper-deck-floor-beam","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":37746,"registerId":"commonwealth-F2005L02819-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 747 Series Aeroplanes","sectionType":"division","heading":"Boeing 747 Series Aeroplanes","content":"### Boeing 747 Series Aeroplanes\n\n| AD/B747/335 | Station 980 Upper Deck Floor Beam | 11/2005 |\n| ----------- | --------------------------------- | ------- |\n\n| Applicability: | Model 747-400 and 747-400D series aircraft, as listed in Boeing Alert Service Bulletin 747-53A2503, dated 11 November 2004, or later FAA approved revision.                                                                                                                                                                                             |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the technical requirements of FAA AD 2005-16-10 Amdt 39-14215.                                                                                                                                                                                                                                                                |\n| Compliance:    | As specified in the Requirement document, with a revised effective date of 27 October 2005.                                                                                                                                                                                                                                                             |\n|                | This Airworthiness Directive becomes effective on 27 October 2005.                                                                                                                                                                                                                                                                                      |\n| Background:    | The FAA received reports of corrosion under the lift cart threshold at the station 980 upper deck floor beam. The actions required by this Directive are intended to detect and correct such corrosion, which could result in a cracked or broken floor beam, extensive damage to adjacent structure, and possible rapid decompression of the aircraft. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n16 September 2005","sortOrder":0},{"sectionNumber":"AD/B747/335","sectionType":"part","heading":"AD/B747/335","content":"## AD/B747/335","sortOrder":1},{"sectionNumber":"Station 980 Upper Deck Floor Beam","sectionType":"part","heading":"Station 980 Upper Deck Floor Beam","content":"## Station 980 Upper Deck Floor Beam","sortOrder":2},{"sectionNumber":"11/2005","sectionType":"part","heading":"11/2005","content":"## 11/2005","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive adopts the FAA AD (2005-16-10) and Boeing Alert Service Bulletin 747-53A2503 for the specified 747-400/747-400D fleet. It does not expand applicability or add actions beyond the FAA document; the only local change recorded in the text is a revised effective date of 27 October 2005 (Applicability / Requirement / Compliance)."},"complexity_factors":["Incorporation by reference of FAA AD 2005-16-10 rather than restating technical steps (creates cross-authority dependency) (Requirement).","Reference to Boeing Alert Service Bulletin 747-53A2503 for applicability and technical detail (Applicability / Requirement).","Safety-critical structural inspections and repairs that may require specialised maintenance and parts (Background / Requirement).","Single, clearly defined applicability limited to 747-400 and 747-400D models (Applicability) — narrows operational scope.","Fixed effective/compliance date (27 Oct 2005) creates a discrete compliance deadline for operators (Compliance).","Enforcement by CASA (Delegate signature) with limited discretion visible in the text (Delegate of the Civil Aviation Safety Authority)."],"plain_english_summary":"This Airworthiness Directive requires operators of Boeing 747-400 and 747-400D aeroplanes to carry out the inspections and corrective actions set out in FAA AD 2005-16-10, using Boeing Alert Service Bulletin 747-53A2503 as referenced. It responds to reported corrosion under the lift-cart threshold at station 980 upper-deck floor beam. Operators and maintenance providers must comply by the effective date (27 Oct 2005); operators bear inspection and repair costs and CASA enforces the requirement."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard single-issue Airworthiness Directive addressing a specific corrosion finding. It has not expanded beyond its original purpose of mandating inspection and repair of the Station 980 floor beam corrosion issue."},"complexity_factors":["Very short document (approximately 200 words of substantive content)","Only 1 defined applicability criterion (specific aircraft models)","Single technical requirement referencing an external FAA document rather than spelling out detailed procedures","No nested exceptions or conditional logic — straightforward compliance deadline","No cross-references to other Australian legislation or complex statutory interpretation provisions","Standardised AD format with predictable structure (Applicability/Requirement/Compliance/Background)"],"plain_english_summary":"This Airworthiness Directive requires operators of specified Boeing 747-400 and 747-400D aircraft to inspect and repair corrosion found under the upper‑deck lift‑cart threshold at Station 980, following the Boeing service bulletin and FAA AD 2005‑16‑10. The corrosion can lead to floor‑beam failure, structural damage and rapid decompression. Compliance is mandatory for affected owners/operators, with deadlines beginning 27 October 2005."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-335-station-980-upper-deck-floor-beam","history":"/api/acts/ad-b747-335-station-980-upper-deck-floor-beam/history","analysis":"/api/acts/ad-b747-335-station-980-upper-deck-floor-beam/analysis","conflicts":"/api/acts/ad-b747-335-station-980-upper-deck-floor-beam/conflicts","importantCases":"/api/acts/ad-b747-335-station-980-upper-deck-floor-beam/important-cases","documents":"/api/acts/ad-b747-335-station-980-upper-deck-floor-beam/documents"}}