{"id":"F2005L01317","name":"AD/PC-12/46 - Landing Gear Components","slug":"ad-pc-12-46-landing-gear-components","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":35064,"registerId":"commonwealth-F2005L01317-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Pilatus PC-12 Series Aeroplanes","sectionType":"division","heading":"Pilatus PC-12 Series Aeroplanes","content":"### Pilatus PC-12 Series Aeroplanes\n\n| AD/PC-12/46 | Landing Gear Components | 7/2005 |\n| ----------- | ----------------------- | ------ |\n\n| Applicability: | Model PC-12 and PC-12/45 aircraft, serial numbers MSN 101 through MSN 471 and MSN 473 through MSN 482; equipped with Landing Gear Components as listed below:Nose Landing Gear assemblies part numbers 532.20.12.038 and 532.20.12.039, with serial numbers AM 001 through AM 045, and AM 048 through AM 054.Main Landing Gear assemblies part number 532.10.12.049 and 532.10.12.050, with serial numbers AM 001 through AM 027, AM 029 through AM 045, AM 047 through AM 050, AM 052 and AM 053.Main Landing Gear shock absorber assemblies part number 532.10.12.175, with serial numbers AM 001 through AM 017, AM 019, AM 021 through AM 063, AM 065 through AM 070, AM 072 through AM 074, AM 080, AM 084, AM 086, AM 089, AM 090, AM 093 through AM 096, AM 099, and AM 103 through AM 107.                                                                                  |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Perform an inspection of the Nose Landing Gear assemblies part number 532.20.12. 038 or 532.20.12.039, the Main Landing gear assemblies part number 532.10.12.049 or 532.10.12.050, and the Main Landing Gear shock absorber assembly 532.10.12.175, to determine if the serial numbers start with the letters AM. If the assembly serial numbers do not start with the letters AM, no further action is required.If, during the required inspection, an assembly has a serial number starting with the letters AM, within the compliance time, replace the affected component(s) with new parts as specified in Pilatus PC-12 Service Bulletin No. 32-16 dated 11 March 2004 or later FOCA approved revisions. Before installing any assembly, check compliance with AD/PC-12/30 (PC-12 SB 32-012) and AD/PC-12/38 (PC-12 SB 32-015).Note: Switzerland FOCA AD HB-2005-168 refers. |\n| Compliance:    | Inspect within 300 hours time in service after 7 July 2005, but not later than 31 December 2005.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |\n|                | This Airworthiness Directive becomes effective on 7 July 2005.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |\n\n| Background: | The manufacturer has discovered that some components of the nose and main landing gear assemblies and the main landing gear shock absorber assemblies have the potential to fail during operation. Investigation revealed an improper cadmium plating process was applied to certain high strength steel landing gear parts, which could result in hydrogen embrittlement. This condition can decrease the specified fatigue life and could lead to component failure and landing gear collapse during operation. |\n| ----------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n25 May 2005","sortOrder":0},{"sectionNumber":"AD/PC-12/46","sectionType":"part","heading":"AD/PC-12/46","content":"## AD/PC-12/46","sortOrder":1},{"sectionNumber":"Landing Gear Components","sectionType":"part","heading":"Landing Gear Components","content":"## Landing Gear Components","sortOrder":2},{"sectionNumber":"7/2005","sectionType":"part","heading":"7/2005","content":"## 7/2005","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific manufacturing defect in landing gear components. The scope remains precisely focused on the identified safety risk and affected aircraft population. No scope creep is evident."},"complexity_factors":["Extensive serial number ranges requiring cross-checking against multiple lists (aircraft MSN ranges, plus three separate component serial number lists with gaps and non-sequential numbering)","Nested conditional logic: inspection triggers replacement only if serial numbers match 'AM' prefix, but replacement parts must also be verified against two prior airworthiness directives","Dual compliance deadlines (300 flight hours OR calendar date of 31 December 2005, whichever is earlier)","Reference to external technical document (Pilatus Service Bulletin No. 32-16) and Swiss aviation authority directive (FOCA AD HB-2005-168) for replacement part specifications","Multiple component types covered (nose gear, main gear, and shock absorber assemblies) each with different part number ranges"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators of certain Pilatus PC‑12 aircraft to inspect landing gear components for serial numbers beginning with \"AM\" and replace any affected parts by the specified deadline. The order responds to faulty cadmium plating that can cause hydrogen embrittlement and potential gear collapse during takeoff or landing. It’s mandatory for listed PC‑12 serial ranges and prevents a serious in‑flight/ground safety hazard."},"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"},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"This AD remains narrowly focused on a specific safety defect (improper cadmium plating causing potential hydrogen embrittlement) in particular landing gear assemblies for a defined range of PC‑12 aircraft. It requires inspection and replacement of affected parts and cross‑checks with existing ADs and service bulletins. There is no indication in the text that the directive expanded beyond that original safety remediation purpose."},"complexity_factors":["Multiple specific part numbers (three different P/N groups) listed in Applicability","Long lists of affected serial number ranges (many non‑contiguous ranges) for each part number","Conditional action based on serial prefix (only serials starting with \"AM\" require replacement)","Cross‑references to an external service bulletin (Pilatus SB No. 32‑16) and to two other ADs (AD/PC‑12/30 and AD/PC‑12/38)","Dual compliance deadline: within 300 hours time in service after effectivity and an absolute calendar cut‑off (31 Dec 2005)","Requirement that replacements be FOCA‑approved revisions of the service bulletin (regulatory approval dependency)"],"plain_english_summary":"**What this law does**\n\n- This Airworthiness Directive (AD) requires owners/operators of certain Pilatus PC-12 and PC-12/45 aeroplanes to inspect specific landing‑gear parts and, if those parts are the affected batch, replace them with approved new parts. (See \"Applicability\" and \"Requirement\".)\n\n**Which aircraft and parts are affected**\n\n- Affected aircraft: Pilatus PC-12 and PC-12/45 with manufacturer serial numbers (MSN) 101–471 and 473–482. (Applicability.)\n- Affected parts: specified Nose Landing Gear assemblies (P/N 532.20.12.038 and 532.20.12.039), Main Landing Gear assemblies (P/N 532.10.12.049 and 532.10.12.050) and Main Landing Gear shock absorber assemblies (P/N 532.10.12.175). Only parts with serial numbers listed in the AD (serials beginning with the letters “AM” within certain ranges) are potentially defective. (Applicability; Requirement.)\n\n**What owners/operators must do**\n\n- Inspect the listed landing gear assemblies to determine whether their serial numbers start with the letters \"AM.\" (Requirement.)\n- If a listed assembly’s serial number does not start with \"AM\", no further action is required for that assembly. (Requirement.)\n- If a listed assembly’s serial number does start with \"AM\", replace the affected component(s) with new parts as specified in Pilatus PC‑12 Service Bulletin No. 32‑16 (dated 11 March 2004) or a later revision approved by the Swiss FOCA (Requirement). Before installing any replacement assembly, also check and comply with AD/PC‑12/30 (PC‑12 SB 32‑012) and AD/PC‑12/38 (PC‑12 SB 32‑015). (Requirement.)\n\n**When it must be done**\n\n- The inspection must be carried out within 300 hours time in service after 7 July 2005, but in any case no later than 31 December 2005. The AD took effect on 7 July 2005. (Compliance.)\n\n**Why this matters**\n\n- Pilatus investigated and found some landing gear parts had been cadmium plated using an incorrect process. That can cause hydrogen embrittlement in high‑strength steel parts, reducing fatigue life and raising the risk of component failure and possible landing‑gear collapse during operation. The AD addresses that safety risk by removing potentially affected parts from service. (Background.)\n\n**Who pays and who decides**\n\n- Owners/operators of the affected aircraft pay for inspections, replacement parts and labour. Maintenance organisations or approved maintenance providers carry out the work under CASA/FOCA rules. The AD requires use of replacement parts and service bulletins approved by the regulator (FOCA in this AD), which constrains the pool of acceptable parts and suppliers. (Requirement; Compliance.)\n\n**Practical consequences, trade‑offs and implementation issues**\n\n- Compliance cost and aircraft downtime: inspecting multiple aircraft and replacing any affected components will produce direct costs (parts and labour) and indirect costs (downtime and potential revenue loss while grounded). (Requirement; Compliance.)\n- Supply and availability risk: the AD requires replacement parts that meet a specific Pilatus service bulletin and FOCA approval, so delays are possible if approved parts are in short supply. (Requirement.)\n- Verification burden: operators must check part numbers and serial numbers against a long list of affected ranges; this is administratively straightforward but time‑consuming, and errors in recordkeeping increase compliance risk. (Applicability; Requirement.)\n- Interaction with other directives: the AD explicitly requires checking compliance with two other ADs before installing replacement assemblies, which adds procedural steps and potential additional costs. (Requirement.)\n- Market effects: the directive increases short‑term demand for approved replacement assemblies and for maintenance services. Independent maintenance organisations can perform the work, subject to regulatory approvals and availability of approved parts. The AD also removes certain used assemblies from the serviceable pool, affecting parts‑market supply for owners and traders. (Requirement; Compliance.)\n\n**Source claim vs mechanical effect**\n\n- The AD states the purpose as preventing landing‑gear failure caused by improper cadmium plating. Mechanically, it searches for assemblies from the affected batch (serials beginning with \"AM\") and eliminates them from service by requiring replacement with FOCA‑approved parts. That creates a one‑off compliance cost for owners/operators and an operational incentive to verify part provenance in ongoing maintenance records. (Background; Requirement.)\n\n**Reference notes**\n\n- The AD refers to Pilatus Service Bulletin No. 32‑16 (11 March 2004) for replacement parts and to Swiss FOCA approvals. It also refers to Swiss FOCA AD HB‑2005‑168. (Requirement; Note.)"}},"importantCases":[],"_links":{"self":"/api/acts/ad-pc-12-46-landing-gear-components","history":"/api/acts/ad-pc-12-46-landing-gear-components/history","analysis":"/api/acts/ad-pc-12-46-landing-gear-components/analysis","conflicts":"/api/acts/ad-pc-12-46-landing-gear-components/conflicts","importantCases":"/api/acts/ad-pc-12-46-landing-gear-components/important-cases","documents":"/api/acts/ad-pc-12-46-landing-gear-components/documents"}}