{"id":"F2006B10548","name":"AD/HS 748/14 - Nose Landing Gear Jack Support Bracket Attachment Studs","slug":"ad-hs-748-14-nose-landing-gear-jack-support-bracket-attachment-studs","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116359,"registerId":"commonwealth-F2006B10548-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HS 748/14 - Nose Landing Gear Jack Support Bracket Attachment Studs","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  British Aerospace (Hawker Siddeley) HS 748 Series Aeroplanes\n\n \n\n# AD/HS 748/14 Nose Landing Gear Jack Support\n\nBracket Attachment Studs\n\nApplicability: All HS748 aircraft post Modification 1472 and pre Modification 7513.\n\n# 5/95\n\n \n\nRequirement: Replace all Nose Landing Gear Jack Support Bracket Bearing Cap Attachment Studs P/N 2cD13248 in accordance with British Aerospace Alert Service Bulletin (ASB) A53/53 Revision 1.\n\n \n\nNote: CAA (UK) AD 013-11-86 refers.\n\n \n\nCompliance: Replace before 7 000 landings.\n\n \n\nNote: Incorporation of Modification 7513 cancels the requirement of this AD by introducing bolts with an extended fatigue life.\n\n \n\nBackground:  Service experience has shown that a safe life policy is required to ensure the continued integrity of the nose landing gear support structure. Nose landing gear malfunctions have been reported because of this problem.\n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, original safety directive focused on a specific mechanical defect. It has not expanded beyond its original purpose of addressing nose landing gear stud fatigue."},"complexity_factors":["Single, specific mechanical requirement (replace one part number)","Clear applicability criteria based on two modification states (pre/post)","Simple numeric compliance threshold (7,000 landings)","No cross-references to other legislation beyond a single UK authority reference","No defined terms section or interpretive provisions","Single exception/cancellation condition (Modification 7513)"],"plain_english_summary":"This CASA Airworthiness Directive mandates replacement of specific attachment studs (P/N 2cD13248) that secure the nose landing‑gear jack support bracket on certain British Aerospace HS 748 aeroplanes before they reach 7,000 landings.  \n\nIt applies to aircraft modified by Mod 1472 that have not had Mod 7513 installed; Mod 7513 uses stronger bolts and removes the requirement. The rule prevents stud fatigue that can cause nose‑gear failure on landing."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument's scope as stated applies only to HS 748 aircraft between Mod 1472 and Mod 7513, mandates replacement of the specified studs before 7,000 landings, and is cancellable by Mod 7513; no change from that stated scope is evident in the text supplied."},"complexity_factors":["Narrow applicability: only HS 748 aircraft post Mod 1472 and pre Mod 7513","Single mandatory technical action: replace a specific part (P/N 2cD13248)","Clear compliance metric: before 7,000 landings","Relies on an external manufacturer Alert Service Bulletin for procedures","Provision for cancellation upon incorporation of Mod 7513 (alternative compliance)","Operational/compliance burden falls on aircraft owners/operators (parts and maintenance)"],"plain_english_summary":"This directive requires operators of British Aerospace HS 748 aircraft (modified by Mod 1472 but not yet by Mod 7513) to replace the Nose Landing Gear Jack Support Bracket Bearing Cap Attachment Studs (P/N 2cD13248) in accordance with British Aerospace Alert Service Bulletin A53/53 Rev 1. Replacement must occur before 7,000 landings; fitting Mod 7513 (longer‑life bolts) cancels the requirement.\n\nIt affects aircraft owners/operators who bear the cost and administrative burden, changes maintenance scheduling and component life-tracking, and relies on the external ASB for technical procedure."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hs-748-14-nose-landing-gear-jack-support-bracket-attachment-studs","history":"/api/acts/ad-hs-748-14-nose-landing-gear-jack-support-bracket-attachment-studs/history","analysis":"/api/acts/ad-hs-748-14-nose-landing-gear-jack-support-bracket-attachment-studs/analysis","conflicts":"/api/acts/ad-hs-748-14-nose-landing-gear-jack-support-bracket-attachment-studs/conflicts","importantCases":"/api/acts/ad-hs-748-14-nose-landing-gear-jack-support-bracket-attachment-studs/important-cases","documents":"/api/acts/ad-hs-748-14-nose-landing-gear-jack-support-bracket-attachment-studs/documents"}}