{"id":"F2006B06317","name":"AD/PR/19 Amdt 1 - Propeller Blade Corrosion - Inspection and Repair","slug":"ad-pr-19-amdt-1-propeller-blade-corrosion-inspection-and-repair","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47452,"registerId":"commonwealth-F2006B06317-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PR/19 Amdt 1 - Propeller Blade Corrosion - Inspection and Repair","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nPropellers \\- Variable Pitch \\- Dowty Rotol\n\nAD/PR/19\n\nAmdt 1\n\n  \nPropeller Blade Corrosion \\- Inspection and Repair 8/83\n\nApplicability: All propeller blades listed by S/Nos. in the requirement document. Document: Dowty Rotol SB No. 61-888, Rev. 1.\n\nCompliance: Daily as from 8th July, 1983.\n\nNote: For aircraft maintained in accordance with ANO 100.5.1 this Directive shall be entered on the maintenance release as maintenance required. The inspection may be performed by the pilot in command, in which case certification is not required. In all other cases certification may be made on the maintenance release. This inspection may also be performed and certified by any Licensed Aircraft Maintenance Engineer.\n\nBackground: A number of blades have been found with excessive and unrectified corrosion at relatively low service hours, which could be the result of a variation in heat treatment of the basic forging, limited to a known batch. This Directive is raised in issue to conform with Rev. 1 of requirement document and extends effectivity to include an additional propeller model fitted to AW650-222 and AW650-100 series aircraft.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":true,"description":"This is Amendment 1 to an existing directive. The original AD/PR/19 has been expanded to cover an additional propeller model (for AW650-222 and AW650-100 series aircraft) beyond the originally affected batch. The scope has grown from a specific manufacturing batch issue to include additional aircraft types, though the core safety concern (corrosion inspection) remains the same."},"complexity_factors":["Very short document (approximately 200 words)","Only 2 defined references (ANO 100.5.1 and the Dowty Rotol service bulletin)","Simple conditional logic: two pathways for compliance (pilot-performed vs engineer-performed) based on maintenance system used","No nested exceptions or cross-references to other legislation","Single, clear compliance action (daily inspection) with straightforward applicability criteria (serial number list in external document)"],"plain_english_summary":"This CASA Airworthiness Directive mandates daily inspections of certain Dowty Rotol variable‑pitch propeller blades for corrosion and immediate repair if defects are found. It applies to owners/operators of affected blades (including those on AW650‑222 and AW650‑100 series), licensed maintenance engineers who must certify the work, and—in limited cases—pilots operating under a specified maintenance system who may perform the checks. It prevents in‑flight failures from early‑onset corrosion."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The amendment updates effectivity to conform with Dowty Rotol SB No. 61‑888 Rev.1 and expressly extends coverage to an additional propeller model fitted to AW650‑222 and AW650‑100 series aircraft, thereby broadening the set of affected blades from the prior version."},"complexity_factors":["Narrow, equipment‑specific scope tied to serial numbers listed in an external service bulletin (Dowty Rotol SB No. 61‑888 Rev.1).","High inspection frequency: daily compliance from a fixed start date increases operational burden and monitoring costs.","Multiple certification routes: pilot‑performed inspections without certification versus engineer certification and maintenance‑release entries under ANO 100.5.1 create variable administrative procedures.","Extension of effectivity to additional propeller model(s) fitted to AW650‑222 and AW650‑100 increases tracking requirements for affected fleets.","Repairs may be required where corrosion is found, imposing direct repair costs and potential aircraft downtime.","Implementation depends on accurate serial‑number tracking and adherence to the external requirement document for inspection technique and acceptance criteria."],"plain_english_summary":"**Requires daily corrosion checks of certain Dowty Rotol variable‑pitch propeller blades and repair where needed.** The directive applies to blades listed by serial number in Dowty Rotol SB No. 61‑888 Rev.1, extends coverage to a model fitted to AW650‑222 and AW650‑100 aircraft, and has been effective since 8 July 1983. Pilots may perform the inspection without certification; otherwise a Licensed Aircraft Maintenance Engineer must inspect and/or certify. Owners/operators pay for inspections and any repairs and must record the directive on the maintenance release where ANO 100.5.1 applies."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pr-19-amdt-1-propeller-blade-corrosion-inspection-and-repair","history":"/api/acts/ad-pr-19-amdt-1-propeller-blade-corrosion-inspection-and-repair/history","analysis":"/api/acts/ad-pr-19-amdt-1-propeller-blade-corrosion-inspection-and-repair/analysis","conflicts":"/api/acts/ad-pr-19-amdt-1-propeller-blade-corrosion-inspection-and-repair/conflicts","importantCases":"/api/acts/ad-pr-19-amdt-1-propeller-blade-corrosion-inspection-and-repair/important-cases","documents":"/api/acts/ad-pr-19-amdt-1-propeller-blade-corrosion-inspection-and-repair/documents"}}