{"id":"F2006B06887","name":"AD/SD3-60/41 - Propeller Attaching Bolts","slug":"ad-sd3-60-41-propeller-attaching-bolts","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114767,"registerId":"commonwealth-F2006B06887-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SD3-60/41 - Propeller Attaching Bolts","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nShort SD3-60 Series Aeroplanes\n\nAD/SD3-60/41 Propeller Attaching Bolts 13/94\n\nApplicability: All model SD3-60 series aircraft fitted with Hartzell HC-B5MP-( ) propellers. Requirement: Action in accordance with Hartzell Alert SB A203.\n\nCompliance: Within 120 hours time in service from 8 December 1994.\n\nThereafter, reinspect at intervals not exceeding 120 hours time in service.\n\nNote: This directive does not apply until the propeller AND engine flanges have been in operation for 3000 or more hours since new.\n\nBackground: The FAA has previously advised that at least 12 failures of the P/N B-3339 propeller attaching bolts had occurred. This Directive is being raised after advice from the propeller manufacturer that further cracked and failed propeller attaching bolts have been reported.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1526},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive remains tightly scoped to the specific safety issue of propeller attaching bolt failures on Short SD3-60 aircraft with Hartzell HC-B5MP propellers. No evidence of scope expansion beyond the original safety-critical maintenance requirement."},"complexity_factors":["Requires reference to external technical document (Hartzell Alert SB A203) without reproducing its contents","Heavy use of aviation-specific nomenclature and part numbers (P/N B-3339, HC-B5MP series)","Conditional applicability based on accumulated flight hours threshold (3000 hours)","Precise recurring compliance intervals measured in 'time in service' (120 hours TIS)"],"plain_english_summary":"This mandatory aviation safety order requires urgent and recurring inspections of the B-3339 propeller bolts that attach Hartzell HC-B5MP propellers on Short SD3-60 aircraft. It applies only where propeller and engine flanges have accrued 3,000+ hours.\n\nInitial inspection must occur within 120 flight hours of 8 Dec 1994, with re-inspections every 120 hours, after reports of at least 12 cracked or failed bolts that could allow in-flight propeller separation."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sd3-60-41-propeller-attaching-bolts","history":"/api/acts/ad-sd3-60-41-propeller-attaching-bolts/history","analysis":"/api/acts/ad-sd3-60-41-propeller-attaching-bolts/analysis","conflicts":"/api/acts/ad-sd3-60-41-propeller-attaching-bolts/conflicts","importantCases":"/api/acts/ad-sd3-60-41-propeller-attaching-bolts/important-cases","documents":"/api/acts/ad-sd3-60-41-propeller-attaching-bolts/documents"}}