{"id":"F2006B05609","name":"AD/PA-28/52 - Nose Landing Gear - Inspection and Modification","slug":"ad-pa-28-52-nose-landing-gear-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135225,"registerId":"commonwealth-F2006B05609-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-28/52 - Nose Landing Gear - Inspection and Modification","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)  \nPiper PA-28 Series Aeroplanes\n\nAD/PA-28/52 Nose Landing Gear \\- Inspection and Modification 6/75\n\nApplicability: All models with nose-wheel installation to STC SA28IAL.\n\nRequirement: 1. (a) Visually inspect the nosewheel fork (Tibbetts Herre Airmotive P/N PA-32-1) for bends or distortion.\n\n(b) Visually inspect the nosewheel fork (Tibbetts Herre Airmotive P/N PA-32-1) for cracks using an approved dye penetrant technique.\n\n    2. Replace the following items:\n\n    (a) Nosewheel Fork (Tibbetts Herre Airmotive P/N PA-32-1) with Fork P/N HPA-32-1.\n\n    (b) Cap-Piper P/N 20825-00 with Tibbetts Herre P/N PA-32-5.\n\n    (c) Axle Rod \\- Tibbetts Herre P/N PA-32-4 with Tibbetts Herre P/N PA-32-6.\n\nCompliance: For para. 1 \\- Within 25 hours time in service after 6 December 1974 and thereafter at intervals not exceeding 25 hours time in service until modified.\n\nFor para. 2 \\- Within 100 hours time in service after 6 December 1974, unless already accomplished.\n\nNote: Applicable aircraft will have an 8.00-6 nosewheel tyre fitted.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive focused specifically on nose landing gear defects in a particular aircraft modification. It has not expanded beyond its original technical safety purpose."},"complexity_factors":["Very short document (under 300 words)","Only 3 defined part numbers referenced","Simple two-part structure: inspection requirements and replacement requirements","Clear compliance deadlines (25 hours and 100 hours)","Single applicability criterion (STC SA28IAL)","No cross-references to other legislation or regulations beyond the enabling authority (Civil Aviation Regulations 1998)","No conditional logic or nested exceptions"],"plain_english_summary":"Owners/operators of Piper PA-28 aircraft with the STC SA28IAL 8.00‑6 nosewheel must perform dye-penetrant inspections of the nosewheel fork every 25 flight hours and, within 100 flight hours, replace the fork, cap and axle rod with the improved parts specified.  \n\nThis mandatory AD prevents nose‑gear bending/cracking and potential front‑wheel collapse during landing or taxiing, addressing a serious loss‑of‑control and injury risk."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Scope remains focused on PA‑28 aeroplanes fitted with the STC SA28IAL nose‑wheel and addresses nosewheel fork integrity and associated components by requiring inspection and specific part replacements (see Applicability; Requirement). The AD does not expand the class of aircraft beyond that STC nor broaden the subject beyond the nose landing gear components specified."},"complexity_factors":["Targeted applicability: applies only to PA‑28 models with nose‑wheel installation under STC SA28IAL (Applicability) — narrows affected fleet but requires operators to confirm STC status.","Specific inspection technique mandated: dye‑penetrant crack inspection for the nosewheel fork (Requirement 1(b)) — requires appropriate tools/skills or approved facility.","Part‑numbered replacements: prescribes exact replacement part numbers for fork, cap and axle rod (Requirement 2(a)–(c)) — creates dependence on availability of specified parts.","Short, time‑based compliance windows: inspections every 25 hours until modified, replacement within 100 hours after the AD date (Compliance) — imposes recurring inspection burden and a firm modification deadline.","Mechanical focus with limited discretion: text specifies actions and intervals rather than discretionary risk‑based inspection; implementer discretion limited to execution (Requirement & Compliance).","Operational impacts: replacement and inspection cause aircraft downtime and direct costs to operators (inferred from Replacement & Compliance obligations).","Technical note: identifies applicable tyre size (Note) which may affect applicability/identification of affected aircraft."],"plain_english_summary":"This airworthiness directive requires owners/operators of Piper PA‑28 aeroplanes fitted with the STC SA28IAL nose‑wheel to inspect the Tibbetts Herre nosewheel fork for bends and cracks (using dye‑penetrant) and to replace specified nosewheel components with new part numbers. Inspections must be repeated every 25 flight hours until the modification is installed and the replacement parts must be fitted within 100 flight hours. The directive creates mandatory inspection and replacement duties and associated costs and downtime for affected operators."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-28-52-nose-landing-gear-inspection-and-modification","history":"/api/acts/ad-pa-28-52-nose-landing-gear-inspection-and-modification/history","analysis":"/api/acts/ad-pa-28-52-nose-landing-gear-inspection-and-modification/analysis","conflicts":"/api/acts/ad-pa-28-52-nose-landing-gear-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-pa-28-52-nose-landing-gear-inspection-and-modification/important-cases","documents":"/api/acts/ad-pa-28-52-nose-landing-gear-inspection-and-modification/documents"}}