{"id":"F2007L01554","name":"AD/DHC-8/129 - Corrosion Prevention and Control Program","slug":"ad-dhc-8-129-corrosion-prevention-and-control-program","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":66044,"registerId":"commonwealth-F2007L01554-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Bombardier (Boeing Canada/De Havilland) ","sectionType":"division","heading":"Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes","content":"### Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes\n\n| AD/DHC-8/129 | Corrosion Prevention and Control Program | 7/2007 |\n| ------------ | ---------------------------------------- | ------ |\n\n| Applicability: | DHC-8 aircraft, Models 101, 102, 103, 106, 201, 202, 301, 311, 314, and 315, with serial numbers 003 and subsequent.                                                                                                                                                                                                                                                                                              |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the requirements of Transport Canada AD CF-2007-06.Note 1: Incorporation of the Corrosion Prevention and Control Program (CPCP) into the operator’s maintenance schedule constitutes terminating action for this Directive.Note 2: A CPCP developed by Bombardier in Part 1 of Maintenance Program Manual PSM 1-8-7, 1-82-7, 1-83-7, approved by Transport Canada 22 June 2005, refers. |\n| Compliance:    | As specified in the Requirement document, with a revised effective date of5 July 2007.                                                                                                                                                                                                                                                                                                                            |\n|                | This Airworthiness Directive becomes effective on 5 July 2007.                                                                                                                                                                                                                                                                                                                                                    |\n| Background:    | A corrosion and prevention and control program, which identifies specific areas that must be inspected, is required to be implemented in the maintenance program to ensure the structural integrity of the aircraft fleet.                                                                                                                                                                                        |\n\n![](image.001.png)  \nDavid Punshon  \nDelegate of the Civil Aviation Safety Authority\n\n16 May 2007","sortOrder":0},{"sectionNumber":"AD/DHC-8/129","sectionType":"part","heading":"AD/DHC-8/129","content":"## AD/DHC-8/129","sortOrder":1},{"sectionNumber":"Corrosion Prevention and Control Program","sectionType":"part","heading":"Corrosion Prevention and Control Program","content":"## Corrosion Prevention and Control Program","sortOrder":2},{"sectionNumber":"7/2007","sectionType":"part","heading":"7/2007","content":"## 7/2007","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard airworthiness directive with focused, original intent. It addresses a specific safety issue (corrosion in DHC-8 fleet) through established aviation regulatory mechanisms. The scope remains tightly constrained to corrosion prevention for the specified aircraft models."},"complexity_factors":["Short, single-purpose directive with one primary requirement","Only 2 defined references (Transport Canada AD CF-2007-06 and Bombardier manual PSM 1-8-7/1-82-7/1-83-7)","Simple conditional logic: compliance achieved either by following the Canadian AD OR by incorporating the CPCP into maintenance schedules","Limited applicability — specific aircraft models and serial number range clearly defined","No nested exceptions or complex cross-referencing to other Australian legislation","Background section provides clear rationale without legal obfuscation"],"plain_english_summary":"This AD requires owners/operators of specified Bombardier DHC-8 (Dash 8) models (101–315) with serial numbers 003 and later to adopt a Corrosion Prevention and Control Program (CPCP) based on Transport Canada guidance CF-2007-06. It mandates regular, targeted corrosion inspections to protect structural integrity. Compliance is achieved by formally incorporating Bombardier’s CPCP into the approved maintenance program, after which separate AD actions are no longer needed."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD stays within its stated original purpose: requiring the implementation of a corrosion prevention and control program to protect structural integrity. It does not broaden the subject matter beyond corrosion prevention (it mandates incorporation of the CPCP and points to technical materials). The cross-reference to Transport Canada and Bombardier documentation is clarifying rather than an expansion of scope; it delegates technical specifics but does not add new regulatory aims or unrelated obligations."},"complexity_factors":["Short, single-subject directive (limited length)","One clear applicability rule (models and serial numbers listed)","Cross-reference to an external regulator's AD (Transport Canada AD CF-2007-06) for technical detail","Reference to manufacturer maintenance manual parts approved by Transport Canada (external documents required for full compliance)","Two notes creating a terminating-action mechanism and pointing to specific Bombardier documentation","No extensive nested exceptions or multiple conditional compliance paths"],"plain_english_summary":"**What this instrument does (mechanically)**\n\n- Requires operators of certain De Havilland (Bombardier/Boeing Canada/De Havilland) DHC-8 series aeroplanes to incorporate a Corrosion Prevention and Control Program (CPCP) into their maintenance program. (See \"Requirement\".)\n- The AD applies to DHC-8 Models 101, 102, 103, 106, 201, 202, 301, 311, 314 and 315 with serial numbers 003 and subsequent. (See \"Applicability\".)\n- Incorporating the CPCP into an operator’s maintenance schedule satisfies (i.e. is \"terminating action\" for) the directive—no further AD action is required once the CPCP is adopted. (See Note 1 under \"Requirement\".)\n- The AD points operators to Transport Canada AD CF-2007-06 for the detailed requirements and to Bombardier’s CPCP material (Maintenance Program Manual parts) approved by Transport Canada (22 June 2005). Compliance is required from 5 July 2007. (See \"Requirement\", \"Note 2\" and \"Compliance\".)\n\n**Who this affects**\n\n- Airlines, charter operators, corporate flight departments and any other operators who own or operate the listed DHC-8 aeroplane models with serial number 003 or later.\n- Maintenance organisations (in-house or third-party Maintenance, Repair and Overhaul providers) that perform scheduled maintenance on those aeroplanes, because they must implement and carry out the CPCP tasks.\n\n**Why it matters (stated purpose and practical effect)**\n\n- The stated purpose is to ensure structural integrity of the fleet by identifying specific areas that must be inspected and maintained to prevent corrosion. (See \"Background\".)\n- Mechanically, the AD changes operator behaviour by adding mandatory inspection and corrosion-control tasks into the formal maintenance schedule. That creates ongoing maintenance obligations rather than a one-off correction.\n\n**Costs, incentives and trade-offs**\n\n- Who pays: aircraft operators bear the direct costs — preparing/updating maintenance schedules, performing additional inspections and repairs, record-keeping, possible parts and labour, and downtime while work is done.\n- Incentives: operators are incentivised to adopt the CPCP because doing so is the AD’s terminating action; failure to adopt risks non-compliance and possible regulatory action. Operators may outsource work to third-party MROs or to Bombardier-approved providers.\n- Productivity/trade-offs: routine inspections and corrosion-control work increase maintenance workload and can reduce aircraft availability; they may also prevent more costly structural failures and unplanned grounding.\n- Competitive and market effects: the AD increases demand for corrosion-control services and parts. Independent MROs can compete to supply the work provided they are authorised; Bombardier’s documentation is referenced, which concentrates technical guidance but does not, on its face, prohibit other approved methods.\n- Opportunity cost: operator maintenance resources and capital are reallocated to comply with the CPCP rather than other projects.\n\n**Implementation, compliance risk and administration**\n\n- The AD cross-references a Transport Canada AD and approved Bombardier manual parts for technical detail. That external referencing creates operational dependency on those documents for exact inspection intervals, techniques and thresholds.\n- Compliance requires updating organisational maintenance schedules and records; audits or regulatory checks may verify implementation. Incorrect or incomplete incorporation risks being non-compliant with the AD.\n- There is modest administrative discretion: regulators require that the CPCP be implemented, but the AD does not prescribe who must physically perform all tasks (in-house vs contracted MRO), only that the program be in the maintenance schedule and followed.\n\n**Bottom-line summary**\n\nThis AD makes a corrosion prevention and control program mandatory for specified DHC-8 models (serial 003 and later) by requiring operators to incorporate the CPCP (as specified by Transport Canada and Bombardier documentation) into their maintenance schedules. Operators pay for and carry out the inspections and controls; adopting the CPCP is the AD’s terminating action and is intended to protect structural integrity by ensuring targeted, documented corrosion inspections and maintenance."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-dhc-8-129-corrosion-prevention-and-control-program","history":"/api/acts/ad-dhc-8-129-corrosion-prevention-and-control-program/history","analysis":"/api/acts/ad-dhc-8-129-corrosion-prevention-and-control-program/analysis","conflicts":"/api/acts/ad-dhc-8-129-corrosion-prevention-and-control-program/conflicts","importantCases":"/api/acts/ad-dhc-8-129-corrosion-prevention-and-control-program/important-cases","documents":"/api/acts/ad-dhc-8-129-corrosion-prevention-and-control-program/documents"}}