{"id":"F2006B03020","name":"AD/B747/118 Amdt 1 - Cargo Doorway Fitting","slug":"ad-b747-118-amdt-1-cargo-doorway-fitting","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42379,"registerId":"commonwealth-F2006B03020-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B747/118 Amdt 1 - Cargo Doorway Fitting","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/B747/118\n\nAmdt 1\n\n  \nCargo Doorway Fitting 14/98\n\nApplicability: Model 747 series aircraft with line numbers 1 though 200; having 7079-T6 aluminium latch support fittings.\n\nRequirement: Action in accordance with the technical requirements of FAA AD 98-18-23 Amdt 39- 10739.\n\nNote: Boeing Alert Service Bulletin (ASB) 747-53A2377, ASB 747-53A2377 Revision 1, and ASB 747-53A2377 Revision 2 refer.\n\nCompliance: As specified in the Requirement Document with a revised effective date of 31 December 1998.\n\nThis Amendment becomes effective on 31 December 1998.\n\nBackground: Reports were received of cracked fittings on two aircraft. Failure of latch support fittings could result in a cargo door opening during flight.\n\nAmendment 1 is issued in response to a new FAA AD which requires accomplishment of the previously optional terminating action. The FAA received reports indicating that the repetitive inspections required by the existing AD may not detect cracked fittings in a timely manner.\n\nThe original issue of this Airworthiness Directive became effective on 27 May 1993.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment stays within the original scope of the 1993 AD. It tightens the requirements (making optional action mandatory) but does not expand to new aircraft types, new failure modes, or new systems. The core subject — cargo doorway fittings on early Boeing 747s — remains unchanged."},"complexity_factors":["Very short document (under 300 words)","Only 2 defined applicability criteria (line numbers 1–200, specific aluminium alloy)","Single primary requirement referencing external FAA document (AD 98-18-23)","No nested exceptions or conditional logic — straightforward mandate","Cross-references to 3 Boeing Service Bulletins but these are informational only","Clear compliance date with no alternative timelines or escalations"],"plain_english_summary":"This CASA Airworthiness Directive mandates that owners/operators of early-production Boeing 747s (line numbers 1–200) replace the original 7079‑T6 aluminium cargo‑door latch support fittings with the permanent repair — inspections alone are no longer acceptable. Required by 31 December 1998, the change closes a safety gap after inspections failed to reliably detect cracks that could cause mid‑flight cargo‑door failure."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"Amendment 1 modifies the earlier directive by requiring the previously optional terminating action to be accomplished (Amendment 1; Background). That change increases the mandatory corrective scope for operators of the specified 747s with 7079‑T6 latch support fittings, shifting obligations from repeated inspections alone to an enforced repair/termination of the inspection cycle (Requirement; Background)."},"complexity_factors":["Cross-reference to an external FAA AD (FAA AD 98-18-23) and multiple Boeing Alert Service Bulletins requires operators and maintainers to locate, interpret and coordinate several documents (Requirement; Note).","Material- and serial-number-limited applicability (Model 747, line numbers 1–200, 7079‑T6 fittings) requires operator fleet records checks to determine exposure (Applicability).","Change from recurrent inspection regime to a mandatory terminating action increases immediate workload and logistical scheduling for operators and approved maintenance organisations (Background; Requirement).","Safety-critical nature of cargo-door fittings means repairs/inspections must follow certified maintenance procedures and may require grounding or extended downtime for affected aircraft (Background).","Fixed compliance timing (revised effective date 31 December 1998) compresses implementation timelines and may concentrate demand for parts and maintenance resources (Compliance)."],"plain_english_summary":"This directive requires certain Boeing 747s (line numbers 1–200) with 7079‑T6 aluminium latch‑support fittings to comply with FAA AD 98‑18‑23, making a previously optional terminating repair mandatory. Operators must perform the inspections and the mandated repair per the FAA AD and Boeing service bulletins by 31 December 1998 (Requirement; Compliance). The change follows reports of cracked fittings that could allow a cargo door to open in flight (Background); operators bear the cost and scheduling impact of the mandated work."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-118-amdt-1-cargo-doorway-fitting","history":"/api/acts/ad-b747-118-amdt-1-cargo-doorway-fitting/history","analysis":"/api/acts/ad-b747-118-amdt-1-cargo-doorway-fitting/analysis","conflicts":"/api/acts/ad-b747-118-amdt-1-cargo-doorway-fitting/conflicts","importantCases":"/api/acts/ad-b747-118-amdt-1-cargo-doorway-fitting/important-cases","documents":"/api/acts/ad-b747-118-amdt-1-cargo-doorway-fitting/documents"}}