{"id":"F2006B05017","name":"AD/CESSNA 177/23 - Stabilator Trim Actuator Attach Bolt","slug":"ad-cessna-177-23-stabilator-trim-actuator-attach-bolt","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44927,"registerId":"commonwealth-F2006B05017-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 177/23 - Stabilator Trim Actuator Attach Bolt","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Cessna 177 Series Aeroplanes\n\n \n\nAD/CESSNA 177/23 Stabilator Trim Actuator Attach Bolt 9/76\n\nApplicability: All models 177 and 177RG with S/Nos. 17702255 to 02494, and 177RG0700 to 0937.\n\n \n\nRequirement: Action in accordance with Cessna SL SE76-14.\n\n \n\nNote: FAA AD 76-14-08 AMDT. 39-2671 refers.\n\n \n\nCompliance: Within 25 hours time in service after 18 August 1976.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in a limited production run of aircraft. It has not expanded beyond its original purpose of mandating inspection/replacement of a single component."},"complexity_factors":["Extremely short document (under 200 words)","Only 4 operative provisions: applicability, requirement, reference note, and compliance deadline","Single cross-reference to external document (Cessna Service Letter SE76-14)","No defined terms section","Simple conditional logic: if aircraft serial number falls within listed ranges, directive applies","Clear, fixed compliance deadline with no exceptions or alternative methods of compliance stated"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA) that mandates a safety fix for specific Cessna 177 aircraft.\n\n**What it does:**\n- Requires owners and operators of certain Cessna 177 and 177RG model aeroplanes to inspect or replace the **stabilator trim actuator attach bolt** — a critical component that helps control the aircraft's pitch (nose up/down movement).\n\n**Who it affects:**\n- Owners and operators of Cessna 177 and 177RG aircraft with specific serial numbers:\n  - Model 177: Serial numbers 17702255 through 17702494\n  - Model 177RG: Serial numbers 177RG0700 through 177RG0937\n\n**What must be done:**\n- Follow the instructions in **Cessna Service Letter SE76-14** (a manufacturer-issued technical bulletin).\n- Complete the work **within 25 hours of flight time** after 18 August 1976.\n\n**Why it matters:**\n- Faulty stabilator trim hardware could lead to loss of pitch control, potentially causing a crash. This AD ensures the bolt is properly secured before the aircraft can continue flying.\n\n**Background note:**\n- This aligns with a similar US Federal Aviation Administration (FAA) directive (AD 76-14-08), showing this was a known safety issue across jurisdictions."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument establishes its scope within the text: it applies to specified Cessna 177 and 177RG serial-number ranges, mandates compliance with Cessna SL SE76-14, and requires completion within 25 hours TIS after 18 August 1976. The document does not indicate any alteration to that original scope; it sets the initial and operative boundaries rather than modifying a prior scope."},"complexity_factors":["Narrow applicability: specific models and serial-number ranges limit who is affected (Applicability).","Short compliance window: 25 hours time in service after a calendar date creates scheduling pressure (Compliance).","External technical detail referenced but not reproduced: required actions are contained in Cessna SL SE76-14, which operators must obtain and follow (Requirement).","Cross-reference to a foreign regulator's AD (FAA AD 76-14-08) increases traceability steps but does not add procedural complexity to the AD itself (Note).","No alternative compliance or extension mechanism included in the text; straightforward mandatory requirement reduces regulatory discretion (Requirement; Compliance)."],"plain_english_summary":"This AD makes compliance with Cessna Service Letter SE76‑14 mandatory: owners/operators of specified Cessna 177 and 177RG aeroplanes (serials 17702255–02494 and 177RG0700–0937) must address the stabilator trim actuator attach bolt per that service letter within 25 hours TIS after 18 August 1976. It converts the manufacturer’s guidance into a binding safety requirement, creating immediate scheduling, cost, and parts/maintenance pressures for affected operators."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-177-23-stabilator-trim-actuator-attach-bolt","history":"/api/acts/ad-cessna-177-23-stabilator-trim-actuator-attach-bolt/history","analysis":"/api/acts/ad-cessna-177-23-stabilator-trim-actuator-attach-bolt/analysis","conflicts":"/api/acts/ad-cessna-177-23-stabilator-trim-actuator-attach-bolt/conflicts","importantCases":"/api/acts/ad-cessna-177-23-stabilator-trim-actuator-attach-bolt/important-cases","documents":"/api/acts/ad-cessna-177-23-stabilator-trim-actuator-attach-bolt/documents"}}