{"id":"F2006B06182","name":"AD/PFP/8 Amdt 3 - Sensenich Propellers - Blade Modification","slug":"ad-pfp-8-amdt-3-sensenich-propellers-blade-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47035,"registerId":"commonwealth-F2006B06182-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PFP/8 Amdt 3 - Sensenich Propellers - Blade Modification","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 \\- Fixed Pitch\n\nAD/PFP/8\n\nAmdt 3\n\n  \nSensenich Propellers \\- Blade Modification 9/96\n\nApplicability: All model M76EMM, M76EMMS, 76EM8 and 76EM8S( ) series propellers with up to a 4 inch spacer length installed on Lycoming 0-360 type engines, up to 180 HP and 2700 RPM.\n\nNote: These propellers are installed on but not limited to the following aircraft. Piper PA-28-180, PA-28-181, American General Aircraft Holding Co. Inc (formerly Gulfstream American) AA-5 series, Beech B23 and C23, Cessna 172Q, Avions Pierre Robin R-3000/160 and any aircraft modified by STC action.\n\nRequirement: Inspect propeller to confirm if propeller has been identified with the letter “K” in accordance with Sensenich Propeller service bulletin No R-14A dated July 28, 1995. If propellers contain the letter “K” in the serial number, enter a certification against Amendment 3 of this Directive in the propeller log book. If S/N has no \"K\", action in accordance with Sensenich Propeller service bulletin No R-14A dated July 28, 1995.\n\nNote 1: FAA AD 69-09-03 R3 Amdt 39-9583 refers in part.\n\nNote 2: AD/PFP/7 refers to RPM restriction for certain propeller/engine combinations.\n\nCompliance: For propellers with 500 hours or more TIS on 15 August 1996 or TIS is unknown, at the next maintenance release inspection after 15 August 1996 or prior to 28 February 1997, whichever occurs first.\n\nFor propellers with less than 500 hours TIS on 15 August 1996, prior to accumulating 550 hours TIS or by 28 February 1997, whichever occurs first.\n\nBackground: To prevent fatigue failure Sensenich now requires all subject propellers to be modified to the \"K\" revision status irrespective of the type of engine crankshaft installation.\n\nThe original issue of this Airworthiness Directive became effective on 30 September 1970.\n\nAmendment 1 of this Airworthiness Directive became effective on 31 January 1973.\n\nAmendment 2 of this Airworthiness Directive became effective on 30 September 1978.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":true,"description":"This is Amendment 3 of a directive originally issued in 1970. The original AD addressed a specific safety issue with Sensenich propellers. Over 26 years and three amendments, the scope has expanded from the original issue to cover additional propeller models (the 'S' series variants), incorporate new service bulletin requirements, and adjust compliance timeframes. The background note indicates the manufacturer now requires ALL subject propellers to be modified to 'K' status regardless of engine crankshaft type — suggesting earlier versions may have had more limited applicability based on installation differences."},"complexity_factors":["Single, clearly defined applicability section with specific model numbers and engine types","Straightforward two-path compliance requirement (check for 'K', then either log or modify)","Two-tier compliance schedule based on hours flown (TIS = Time In Service)","Minimal cross-referencing (only two notes referencing related directives)","No nested exceptions or conditional logic beyond the hours-based compliance tiers","Short document (approximately 250 words) with plain language background explanation"],"plain_english_summary":"This CASA Airworthiness Directive requires owners and maintainers of aircraft fitted with certain Sensenich fixed‑pitch propellers on Lycoming engines to inspect serial numbers for a \"K\" revision and, if not already modified, carry out the blade modification per Sensenich service bulletin R‑14A. It’s intended to prevent blade fatigue failure that could cause in‑flight breakage. It affects affected aircraft owners/operators and maintenance organisations; compliance timing depends on accumulated propeller hours."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"This amendment mandates that all affected propellers be at the “K” revision status irrespective of engine crankshaft installation, expanding the set of installations requiring modification or certification compared with prior, more installation‑specific treatment. It imposes a universal marking/modification requirement with stepped deadlines based on time‑in‑service."},"complexity_factors":["Multiple specific propeller models and a limited engine type (Lycoming O‑360) narrow but complicate applicability.","Requirement depends on presence or absence of a serial‑number ‘K’ marking, creating a binary compliance path (record vs. modify).","Variable compliance deadlines tied to time‑in‑service thresholds (500 hours, 550 hours) and unknown TIS scenarios.","Mandated work references an external service bulletin (Sensenich R‑14A, 28 July 1995), adding dependence on another document for technical action.","Record‑keeping obligation to enter certification against Amendment 3 in the propeller logbook introduces administrative compliance burden.","Applicability extends to aircraft modified by STC action and lists multiple aircraft types, increasing the number of affected operators.","Cross‑references to earlier ADs (FAA AD and previous AD/PFP amendments) add historical and regulatory linkage that can complicate interpretation."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of certain Sensenich fixed‑pitch propellers (models M76EMM, M76EMMS, 76EM8 and 76EM8S) installed on Lycoming O‑360 engines to check serial numbers for a “K” marking and either record certification in the propeller logbook or carry out the blade modification set out in Sensenich Service Bulletin R‑14A (28 July 1995).\n\nThe measure is intended to prevent blade fatigue failure. Compliance deadlines depend on the propeller’s time‑in‑service; owners/operators bear inspection and modification costs and must update maintenance records."},"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-pfp-8-amdt-3-sensenich-propellers-blade-modification","history":"/api/acts/ad-pfp-8-amdt-3-sensenich-propellers-blade-modification/history","analysis":"/api/acts/ad-pfp-8-amdt-3-sensenich-propellers-blade-modification/analysis","conflicts":"/api/acts/ad-pfp-8-amdt-3-sensenich-propellers-blade-modification/conflicts","importantCases":"/api/acts/ad-pfp-8-amdt-3-sensenich-propellers-blade-modification/important-cases","documents":"/api/acts/ad-pfp-8-amdt-3-sensenich-propellers-blade-modification/documents"}}