{"id":"F2006B02650","name":"AD/B727/128 Amdt 1 - Corrosion Prevention and Control Program","slug":"ad-b727-128-amdt-1-corrosion-prevention-and-control-program","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41966,"registerId":"commonwealth-F2006B02650-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B727/128 Amdt 1 - Corrosion Prevention and Control Program","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 727 Series Aeroplanes\n\nAD/B727/128\n\nAmdt 1\n\n  \nCorrosion Prevention and Control Program 3/92\n\nApplicability: All model 727.\n\nRequirement: Action in accordance with technical requirements of FAA AD 90-25-03 Amdt 39- 6787.\n\nNote 1: Boeing document No. D6-54929 Rev A refers.\n\nNote 2: References made in the FAA AD text to the following; Administrator,\n\nFAA,\n\nFAA Principal Inspector (PI), or\n\nManager Seattle Aircraft Certification Office (ACO),\n\nshall be read as Civil Aviation Authority District (Airport) Office.\n\nNote 3: Notwithstanding CAR 51B, corrosion classified as level 1 need not be reported. Level 2 corrosion may be consolidated with a sixty day report of corrective action, and submitted to the Authority District (Airport) Office under cover of a single MDR. Level 3 corrosion shall be reported by individual MDR.\n\nCompliance: As specified in the Requirement Document. The compliance of the previous issue of this Directive is as stated in this issue. This amendment is effective from 6 March 1992.\n\nBackground: Country of Origin AD, implementation of a corrosion prevention and control program to prevent the degradation of the structural capabilities of the affected aircraft.\n\nAmendment 1 is raised to introduce a note which specifies the reporting requirements when corrosion is found as a result of the CPCP.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment remains tightly focused on its original purpose — implementing corrosion prevention for Boeing 727s. The only change in Amendment 1 is the addition of reporting clarification for corrosion findings, which is ancillary to the core CPCP requirement rather than an expansion of scope."},"complexity_factors":["Short, single-purpose directive (approximately 250 words)","Only 3 defined procedural terms (Level 1, 2, 3 corrosion) with clear reporting distinctions","Single cross-reference to external FAA AD and Boeing document","Simple conditional logic: three-tier classification system with corresponding reporting obligations","Minimal amendment history (Amendment 1 adds only one note on reporting requirements)"],"plain_english_summary":"The AD mandates all Australian Boeing 727 operators to implement a Corrosion Prevention and Control Program based on FAA AD 90-25-03 and Boeing maintenance document D6-54929 Rev A, with Australian authority contacts substituted. It targets owners, operators, maintenance engineers and AMOs to protect aging 727 airframes from structural corrosion.\n\nThe amendment adds mandatory reporting: minor corrosion needs no report, moderate can be batched within 60 days, and severe must be reported immediately."},"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":3,"scope_assessment":{"changed":true,"description":"Amendment 1 does not alter the Directive’s applicability (still 'All model 727') or the underlying technical requirements (still as per FAA AD 90-25-03). It changes administrative scope by specifying reporting obligations when corrosion is found: Level 1 need not be reported; Level 2 may be consolidated into a 60-day corrective-action MDR; Level 3 requires individual MDRs (Note 3). It also instructs that FAA role references be read as the Civil Aviation Authority District (Airport) Office (Note 2). Operators bear the compliance and reporting costs; the District (Airport) Office receives and processes reports (Applicability; Note 2; Note 3; Compliance)."},"complexity_factors":["Cross-reference dependence: Technical requirements are incorporated by reference to FAA AD 90-25-03 rather than contained in the Directive itself (Requirement; Note 1).","External document reliance: Boeing document D6-54929 Rev A is cited as a related document, creating another external source operators must consult (Note 1).","Applicability breadth: Applies to all model 727 aeroplanes, so every operator of those types is in scope (Applicability).","Reporting gradation and administrative burden: The amendment adds tiered reporting rules (Level 1–3) that change when and how operators must submit Mandatory Defect Reports (MDRs) — Level 1 not reported; Level 2 may be consolidated into a single 60-day corrective-action MDR; Level 3 requires individual MDRs (Note 3).","Enforcement phrasing: Compliance is required 'as specified in the Requirement Document', making practical compliance and inspection hinge on the external FAA AD text (Compliance).","Local administrative mapping: References in the FAA AD to FAA roles are to be read as the Civil Aviation Authority District (Airport) Office, which centralises reporting and oversight authority at that local office (Note 2).","Limited amendment scope: The change is narrowly administrative (reporting clarification) rather than a substantive change to the technical CPCP requirements (Background; Amendment 1)."],"plain_english_summary":"This Airworthiness Directive requires operators of all Boeing 727 models to implement a corrosion prevention and control program by following the technical steps in FAA AD 90-25-03 (see Note 1). It adds reporting rules: Level 1 corrosion need not be reported; Level 2 may be consolidated into a single 60‑day corrective-action report; Level 3 must be reported individually (Note 3). The stated purpose is to prevent degradation of the aircraft’s structural capability."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b727-128-amdt-1-corrosion-prevention-and-control-program","history":"/api/acts/ad-b727-128-amdt-1-corrosion-prevention-and-control-program/history","analysis":"/api/acts/ad-b727-128-amdt-1-corrosion-prevention-and-control-program/analysis","conflicts":"/api/acts/ad-b727-128-amdt-1-corrosion-prevention-and-control-program/conflicts","importantCases":"/api/acts/ad-b727-128-amdt-1-corrosion-prevention-and-control-program/important-cases","documents":"/api/acts/ad-b727-128-amdt-1-corrosion-prevention-and-control-program/documents"}}