{"id":"F2009L02646","name":"AD/PHS/25 - Propeller Blade Corrosion","slug":"ad-phs-25-propeller-blade-corrosion","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":79675,"registerId":"commonwealth-F2009L02646-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Propellers - Variable Pitch - Hamilton S","sectionType":"division","heading":"Propellers - Variable Pitch - Hamilton Standard","content":"### Propellers - Variable Pitch - Hamilton Standard\n\n| AD/PHS/25 | Propeller Blade Corrosion | 8/2009 |\n| --------- | ------------------------- | ------ |\n\n```html\n

Applicability:

Hamilton Sundstrand Propellers model 568F propellers with blades, part numbers (P/Ns) R815505R2, R815505R3, R815505R4, R815505S2, and R815505S3, that have a serial number (SN) listed in Table 1 of this AD, installed.

Table 1 - Affected Propeller Blades by SN

31

259

1510

2299

2470

20010732

33

265

1515

2300

2473

20010917

34

277

1803

2383

2492

20020568

37

278

1813

2459

2510

\"\"

40

403

1823

2460

2535

\"\"

43

747

1834

2462

2577

\"\"

105

1007

1917

2464

2625

\"\"

230

1031

2072

2469

20010731

\"\"

Note 1: These propellers are installed on, but not limited to, ATR-GIE Avions de Transport Regional ATR-42-400 and -500, ATR72-210A, -500, and Construcciones Aeronauticas, S.A. C-295 aeroplanes.

Requirement:

Remove from service blades, P/Ns R815505R2, R815505R3, R815505R4, R815505S2, and R815505S3 that have a SN listed in Table 1 of this AD.

Note 2: FAA AD 2009-07-06 Amdt 39-15865 dated 20 March 2009 refers.

Compliance:

Within 30 days after the effective date of this AD, unless previously accomplished.

This Airworthiness Directive becomes effective on 30 July 2009.

\n```\n\n| Background: | This AD results from reports of blades with corrosion pits in the tulip area of the blades. The issuing of this AD is intended to prevent cracks from developing in the tulip area of the blade, which could result in separation of the blade and loss of aeroplane control. |\n| ----------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.002.png) \nJames Coyne \nDelegate of the Civil Aviation Safety Authority\n\n16 June 2009","sortOrder":0},{"sectionNumber":"AD/PHS/25","sectionType":"part","heading":"AD/PHS/25","content":"## AD/PHS/25","sortOrder":1},{"sectionNumber":"Propeller Blade Corrosion","sectionType":"part","heading":"Propeller Blade Corrosion","content":"## Propeller Blade Corrosion","sortOrder":2},{"sectionNumber":"8/2009","sectionType":"part","heading":"8/2009","content":"## 8/2009","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD's scope aligns with its stated safety objective in the background: preventing cracks and potential blade separation by removing the listed blades. The instrument limits action to the specified part- and serial-numbers and sets a 30-day compliance period; it does not expand beyond those listed items or add other regulatory obligations."},"complexity_factors":["Technical identification: requirement targets specific part numbers and a long list of serial numbers, requiring careful record checks.","Short compliance window: mandatory removal within 30 days increases scheduling and logistic pressure on operators.","Cross-reference: links to an FAA AD for related information, adding an external compliance reference.","Operational impact: blades are installed on multiple aircraft types, so grounding/replacement can cause varied downtime and supply demands.","Limited remedial detail: AD mandates removal but does not specify replacement/repair procedures in the text, requiring operators to source approved actions."],"plain_english_summary":"This Airworthiness Directive requires operators to remove from service specific Hamilton Sundstrand 568F propeller blades (identified by part- and serial-numbers listed in the AD) within 30 days to address corrosion pits in the blade “tulip” area that could cause blade separation. It affects aircraft owners/operators using those blades (notably ATR-42/72 and some C-295 installs); operators bear replacement/repair costs and operational downtime, and the Civil Aviation Safety Authority enforces compliance."},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific safety defect in identified propeller blades. There is no evidence of scope creep; it targets exactly the corrosion issue described in the background without expanding to unrelated matters."},"complexity_factors":["Single, unambiguous requirement: remove specific blades by serial number","No defined terms section or interpretive provisions","No conditional logic, exceptions, or nested provisions","Limited cross-referencing (only one reference to the corresponding FAA AD)","Clear compliance deadline (30 days) with single alternative (already accomplished)","Specific identification by part number and serial number table reduces ambiguity"],"plain_english_summary":"This mandatory CASA Airworthiness Directive orders immediate removal from service of specific Hamilton Sundstrand propeller blades (model 568F, serials in Table 1) used on ATR‑42, ATR‑72 and CASA C‑295 aircraft. \n\nCorrosion pits in the blades’ tulip area can grow into cracks and cause blade separation in flight. Australian operators and maintenance organisations must comply within 30 days (or if blades already removed). Do not fly aircraft with affected blades installed."}},"importantCases":[],"_links":{"self":"/api/acts/ad-phs-25-propeller-blade-corrosion","history":"/api/acts/ad-phs-25-propeller-blade-corrosion/history","analysis":"/api/acts/ad-phs-25-propeller-blade-corrosion/analysis","conflicts":"/api/acts/ad-phs-25-propeller-blade-corrosion/conflicts","importantCases":"/api/acts/ad-phs-25-propeller-blade-corrosion/important-cases","documents":"/api/acts/ad-phs-25-propeller-blade-corrosion/documents"}}