{"id":"F2006B06195","name":"AD/PHS/20 Amdt 2 - Propeller Blade Shanks","slug":"ad-phs-20-amdt-2-propeller-blade-shanks","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47065,"registerId":"commonwealth-F2006B06195-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PHS/20 Amdt 2 - Propeller Blade Shanks","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 \\- Hamilton Standard\n\nAD/PHS/20\n\nAmdt 2\n\n  \nPropeller Blade Shanks 7/96 DM\n\nApplicability: All model 14RF-9 propellers with blade serial number below 885751. These propellers are installed on but not limited to Embraer 120 aircraft.\n\nRequirement: 1. Action in accordance with Hamilton Standard Service Bulletin No 14RF-9-61-86 Revision 4 or Hamilton Standard Alert Service Bulletin 14RF-9-61-A90, as applicable.\n\n2. Action in accordance with Hamilton Standard Alert Service Bulletin 14RF-9-61- A92 Revision 2 and is applicable to all propeller blades including those blades which failed the inspection called up in Requirement 1.\n\nNote 1: FAA AD 96-08-01 Amdt 39-9567 refers.\n\nNote 2: FAA AD 96-08-01 Amdt 39-9567 supersedes FAA Priority Letter AD 95-24-09.\n\nNote 3: FAA Priority letter AD 95-24-09 and Brazilian AD EAD NR T95-11-03 HS Amdt 39-752 refer to the initial issue of this Directive.\n\nCompliance: Requirement 1: Unless previously carried out, prior to 22 May 1996.\n\nRequirement 2: Unless previously carried out, prior to 31 August 1996.\n\nBackground: The manufacturer has advised that the in-flight loss of part of a propeller blade has occurred. Amendment 1 raised to mandate compliance with SB 14RF-9-61-A92 Revision 1 and to delete Note 1 in the original issue of this Directive. Amendment 2 makes reference to FAA AD 96-08-01 and Revision 2 of Hamilton Standard ASB 14RF-9-61-92.\n\nThe original issue of this Airworthiness Directive became effective 30 November 1995.\n\nAmendment 1 of this Airworthiness Directive became effective 2 February 1996.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"Amendments did not broaden the population of affected propellers but updated and specified the mandatory corrective documents and references: Amendment 1 mandated ASB 14RF-9-61-A92 Revision 1 (and removed an earlier note); Amendment 2 references FAA AD 96-08-01 and mandates ASB 14RF-9-61-A92 Revision 2. Deadlines and required actions were clarified across the amendments."},"complexity_factors":["Narrow applicability by propeller model and blade serial-number cutoff (serial numbers below 885751) increases precision but requires record checks.","Two distinct mandatory actions with separate deadlines (Requirement 1 prior to 22 May 1996; Requirement 2 prior to 31 August 1996) create phased compliance.","Multiple service documents and revisions referenced (Hamilton Standard SB No 14RF-9-61-86 Rev 4; ASB 14RF-9-61-A90; ASB 14RF-9-61-A92 Rev 2) require operators to identify the correct revision.","Cross-references to FAA AD 96-08-01 and earlier FAA/Brazilian ADs add external regulatory linkage that may change technical expectations.","Requirement 2 applies both to all blades and specifically to blades that failed Requirement 1 inspection, creating a cascading remedy obligation.","Operators/owners bear responsibility to arrange and pay for the inspections/repairs, creating direct cost and logistical obligations.","Amendment history (original AD + Amendment 1 + Amendment 2) increases traceability demands for compliance evidence and which amendment was in force at particular dates."],"plain_english_summary":"Mandates owners/operators of Hamilton Standard model 14RF-9 propellers (blade serial numbers below 885751), commonly fitted to Embraer 120 and other types, to perform inspections and corrective work specified in particular Hamilton Standard Service/Alert Bulletins. Operators must arrange and pay for compliance by the stated deadlines to address reported in‑flight loss of propeller blade parts. The directive references multiple bulletin revisions and cross‑references to FAA/Brazilian ADs, with two separate compliance deadlines (22 May 1996 and 31 August 1996)."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment remains tightly focused on its original purpose: addressing a specific safety defect in Hamilton Standard 14RF-9 propellers. Amendment 2 merely updates references to the latest manufacturer and FAA documentation (Revision 2 of the Alert Service Bulletin and FAA AD 96-08-01) without expanding the applicability or adding new categories of affected aircraft."},"complexity_factors":["Short, single-purpose document (approximately 250 words)","Only 2 substantive requirements with clear deadlines","4 defined/model identifiers (14RF-9, 885751, Embraer 120, specific bulletin numbers)","Simple conditional logic ('as applicable', 'including those blades which failed')","Cross-references to 4 external documents (FAA ADs and manufacturer bulletins) but these are informational rather than operative","No nested exceptions or complex definitional sections"],"plain_english_summary":"This CASA Airworthiness Directive orders mandatory inspection and, if needed, repair or replacement of Hamilton Standard 14RF-9 propeller blade shanks (blade S/Ns below 885751), commonly fitted to Embraer 120 aircraft, because a blade partially separated in flight.  \n\nIt updates earlier 1995 requirements (second amendment) and affects operators, airlines and maintenance organisations — ensuring service-bulletin inspections already required in 1996 are carried out to prevent catastrophic failure."},"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-phs-20-amdt-2-propeller-blade-shanks","history":"/api/acts/ad-phs-20-amdt-2-propeller-blade-shanks/history","analysis":"/api/acts/ad-phs-20-amdt-2-propeller-blade-shanks/analysis","conflicts":"/api/acts/ad-phs-20-amdt-2-propeller-blade-shanks/conflicts","importantCases":"/api/acts/ad-phs-20-amdt-2-propeller-blade-shanks/important-cases","documents":"/api/acts/ad-phs-20-amdt-2-propeller-blade-shanks/documents"}}