{"id":"F2006B06260","name":"AD/PL 12/14 Amdt 1 - Nose Landing Gear Pivot Pin and Bushes","slug":"ad-pl-12-14-amdt-1-nose-landing-gear-pivot-pin-and-bushes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47255,"registerId":"commonwealth-F2006B06260-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PL 12/14 Amdt 1 - Nose Landing Gear Pivot Pin and Bushes","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)  \nTransavia PL 12 Series Aeroplanes\n\nAD/PL 12/14\n\nAmdt 1\n\n  \nNose Landing Gear Pivot Pin and Bushes 2/89\n\nApplicability: PL 12 and PL 12U.\n\nRequirement: 1. Replace nose landing gear Pivot Pin P/N 6-24 Issue “C” and Bushes P/N 6-22 Issue “A” with Pin P/N 6-24 Issue “D” and Bushes P/N 6-22 Issue “B” or with Pin P/N 6-33 and Bushes P/N 6-34.\n\n2. Inspect nose landing gear Pivot Pin P/N 6-24 Issue “D” or 6-33 for tooling or machine marks. Reject those pins with tooling or machine marks.\n\nNote: Pin P/N 6-24 Issue “D” is same as Pin P/N 6-33 and Bush P/N 6-22 Issue “B” is same as Pin P/N 6-34.\n\n| Compliance: | For Para. 1 - | Unless already accomplished, within 25 hours time in service after 31 October 1973. |\n| ----------- | ------------- | ----------------------------------------------------------------------------------- |\n|             | For Para. 2 - | (i) For Installed Pins: Within 100 hours time in service after 31 October 1973.     |\n|             |               | (ii) For Spare Pins: Before installation.                                           |\n\nBackground: This Amendment deletes “All models” from the “Applicability” and reflects design and manufacturing improvements to later model aircraft.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Yes. The Amendment removes the prior “All models” applicability and limits the directive to Transavia PL 12 and PL 12U. The Background states this reflects design and manufacturing improvements to later model aircraft, narrowing who must comply."},"complexity_factors":["Multiple specific part numbers and issue letters to track (Requirement para 1: P/N 6-24 Issue C→D or P/N 6-33; Bushes P/N 6-22 Issue A→B or P/N 6-34).","Equivalence note linking different part numbers (Note: P/N 6-24 Issue D = 6-33; P/N 6-22 Issue B = 6-34) requires interpretation when sourcing parts.","Different compliance timings for replacement and inspection (Compliance: 25 hours for replacements; 100 hours for installed pin inspections; spares before installation).","A specific inspection criterion (tooling or machine marks) creates a binary reject/accept decision for pins (Requirement para 2).","Amendment changes applicability language (Background deletes “All models”), which affects which operators must comply."],"plain_english_summary":"This airworthiness directive requires replacing specified nose landing gear pivot pins and bushes on Transavia PL 12 and PL 12U aeroplanes and inspecting replacement pins for tooling or machine marks, rejecting any marked pins. Operators must complete the replacement within 25 hours TIS after 31 October 1973, inspect installed pins within 100 hours and ensure spares are checked before installation (Requirement paras 1–2; Compliance). Owners/operators pay for parts and work and must fit the approved part numbers or equivalents; the Background narrows applicability from “All models.”"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":true,"description":"The amendment narrows the scope from the original directive. The Background explicitly states this Amendment deletes 'All models' from the Applicability, restricting it to only PL 12 and PL 12U variants. This reflects that later model aircraft incorporated the design improvements at manufacture, so they no longer need the mandatory retrofit."},"complexity_factors":["Very short document (under 300 words)","Only 2 substantive requirements with clear part numbers","Single cross-reference to Civil Aviation Regulations 1998 Part 39 (standard header)","Simple compliance table with straightforward deadlines","Minimal defined terms (only standard aviation abbreviations like P/N for Part Number)","No nested exceptions or conditional logic"],"plain_english_summary":"This safety directive requires owners/operators and maintenance organisations of Transavia PL 12 and PL 12U aircraft to replace specified nose‑landing‑gear pivot pin and bushing parts with improved part numbers and to inspect replacement pins for tooling marks or machine scratches, rejecting any defective pins. It aims to prevent nose‑gear failure, loss of steering, or collapse. Compliance: replacement within 25 flight hours after 31 Oct 1973; inspections within 100 flight hours and spares checked before fitting."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pl-12-14-amdt-1-nose-landing-gear-pivot-pin-and-bushes","history":"/api/acts/ad-pl-12-14-amdt-1-nose-landing-gear-pivot-pin-and-bushes/history","analysis":"/api/acts/ad-pl-12-14-amdt-1-nose-landing-gear-pivot-pin-and-bushes/analysis","conflicts":"/api/acts/ad-pl-12-14-amdt-1-nose-landing-gear-pivot-pin-and-bushes/conflicts","importantCases":"/api/acts/ad-pl-12-14-amdt-1-nose-landing-gear-pivot-pin-and-bushes/important-cases","documents":"/api/acts/ad-pl-12-14-amdt-1-nose-landing-gear-pivot-pin-and-bushes/documents"}}