{"id":"F2006B03117","name":"AD/B747/217 - E-42 Satellite Communications Rack - 2","slug":"ad-b747-217-e-42-satellite-communications-rack-2","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42489,"registerId":"commonwealth-F2006B03117-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B747/217 - E-42 Satellite Communications Rack - 2","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/B747/217 E-42 Satellite Communications Rack \\- 2 13/99\n\nDM\n\nApplicability: Model 747-300 series aircraft listed in Boeing Alert Service Bulletin 747-53A2428, dated December 17 1998, and Model 747-400 series aircraft equipped with a Boeing installed E-42 satellite communications (SATCOM) rack.\n\nNote: Flight Structures type E-42 SATCOM rack installations are covered by AD/B747/213.\n\nRequirement: Action in accordance with the technical requirements of FAA AD 99-14-04 Amdt 39- 11212.\n\nCompliance: As specified in the Requirement document for the initial and repeat inspections, with a revised effective date of 10 December 1999.\n\nThis Airworthiness Directive becomes effective on 10 November 1999.\n\nBackground: The FAA received reports of fatigue cracking and broken and/or missing fasteners found on the E-42 SATCOM equipment rack structure that attaches to the fuselage structure on several Model 747-300 and \\-400 series aircraft. Investigation revealed that one of the four stanchions was completely broken on two aircraft.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive addressing a specific structural defect in a specific equipment installation on specific aircraft models. It has not expanded beyond its original safety purpose."},"complexity_factors":["Short, single-purpose directive (approximately 200 words)","Only 4 defined applicability categories (747-300 listed in bulletin, 747-400 with Boeing E-42 rack, explicit exclusion for Flight Structures installations, reference to separate AD/B747/213)","Single cross-reference to FAA AD 99-14-04 for technical requirements (incorporation by reference)","No nested conditional logic or exceptions within the directive itself","Clear, linear structure: Applicability → Requirement → Compliance → Background"],"plain_english_summary":"CASA mandates inspections and repairs of the Boeing-installed E‑42 satellite communications rack on certain 747‑300 and 747‑400 aircraft after the FAA found fatigue cracking, broken/missing fasteners and snapped support stanchions. Operators must follow FAA AD 99‑14‑04 (with the revised compliance date) to perform initial and repeat inspections and corrective actions. Aircraft with Flight Structures E‑42 racks are covered by a different AD. This prevents possible structural failure."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD targets a specific equipment installation on defined 747 models and directs compliance with FAA AD 99-14-04; the instrument itself does not expand or narrow that technical scope. The only temporal change noted is a revised effective date for the inspection schedule (Compliance: revised effective date of 10 December 1999)."},"complexity_factors":["Cross-reference to an external FAA airworthiness directive for technical requirements (Requirement: FAA AD 99-14-04).","Applicability depends on Boeing Alert Service Bulletin listing (Applicability: Model 747-300 listed in Boeing Alert Service Bulletin 747-53A2428).","Overlap with a separate AD for a different supplier installation (Note: Flight Structures type covered by AD/B747/213).","Mandated initial and repeat inspection schedule with a revised effective date (Compliance: initial and repeat inspections; revised effective date 10 December 1999).","Safety-critical corrective action implied but not detailed here, leaving operators/maintenance organisations to follow the referenced FAA/Boeing procedures (Requirement/Compliance).","Short regulatory text leaves operational detail to external documents and approved maintenance organisations, increasing implementation dependency on those documents (Requirement/Applicability)."],"plain_english_summary":"AD/B747/217 requires operators of certain Boeing 747-300 and 747-400 aeroplanes with Boeing‑installed E‑42 SATCOM racks to carry out initial and repeat inspections and any corrective action specified in FAA AD 99‑14‑04. The directive responds to reported fatigue cracking and broken or missing fasteners (including broken stanchions). It affects aircraft operators and maintenance organisations, who must perform and pay for inspections and repairs to keep the aircraft airworthy."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-217-e-42-satellite-communications-rack-2","history":"/api/acts/ad-b747-217-e-42-satellite-communications-rack-2/history","analysis":"/api/acts/ad-b747-217-e-42-satellite-communications-rack-2/analysis","conflicts":"/api/acts/ad-b747-217-e-42-satellite-communications-rack-2/conflicts","importantCases":"/api/acts/ad-b747-217-e-42-satellite-communications-rack-2/important-cases","documents":"/api/acts/ad-b747-217-e-42-satellite-communications-rack-2/documents"}}