{"id":"F2006B09490","name":"AD/EMB-110/5 Amdt 4 - Flight Control Trim System Bearings","slug":"ad-emb-110-5-amdt-4-flight-control-trim-system-bearings","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":54015,"registerId":"commonwealth-F2006B09490-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/EMB-110/5 Amdt 4 - Flight Control Trim System Bearings","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)  \nEmbraer EMB-110 (Bandeirante) Series Aeroplanes\n\nAD/EMB-110/5\n\nAmdt 4\n\n  \nFlight Control Trim System Bearings 2/92\n\nApplicability: All EMB-110 series.\n\nRequirement: 1. Disconnect and visually inspect the bearings at the following locations for jamming:\n\n    At the tube terminals of the elevator, rudder and aileron trim tab control systems.\n\n    b. At the aileron trim tab bellcrank and actuator eyelets.\n\nNote 1: EMBRAER SB No 110-27-036 R2 refers.\n\nNote 2: Brazilian AD 82-06-01 R8 refers.\n\nNote 3: Compliance with AD/EMB-110/36 terminates the inspection requirement on the elevator trim rods and reverts the inspection interval to that prescribed in the Maintenance Planning Guide.\n\nNote 4: Modification of the aileron and rudder trim tab rod bearings in accordance with EMBRAER SB No 110-27-060 R2 terminates that inspection requirement.\n\n2. Action in accordance with Embraer Service Bulletin No. 110-27-060 R2. Compliance: 1. At intervals not to exceed 250 hours time in service, until compliance with\n\nRequirement 2.\n\n2. Within 1500 hours time in service or 8 months after 3 February 1992; whichever occurs first. The compliance of the previous issue of this Directive was: at intervals not exceeding 250 hours time in service after 28 February 1982 until the relevant modifications are carried out. This amendment is effective from 3 February 1992.\n\nBackground: An inflight failure of the terminal of the control rod in an elevator trim tab has been attributed to jamming of the trim tab bearing assembly.\n\nAmendment 4 is issued in response to a recently issued Country of Origin Directive which requires modification action in lieu of ongoing repetitive inspections.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Amendment 4 changes scope by moving from indefinite repetitive inspections to a mandated modification that, once completed, terminates the inspection requirement. Previously operators relied on recurring 250‑hour inspections; the amendment requires the specified modification within 1500 hours or eight months to end those checks (Background; Compliance; Note 4)."},"complexity_factors":["Multiple compliance paths: ongoing repetitive inspections until a terminating modification is done (Requirement 1; Note 4; Compliance 1).","Specific inspection locations are enumerated (trim‑tab tube terminals, bellcrank and actuator eyelets), creating inspection scope detail (Requirement 1).","Time and calendar deadlines: 250‑hour inspection interval until modification; modification due within 1500 hours or 8 months from 3 Feb 1992 (Compliance 1–2).","Cross‑references to external materials and directives (Emb­raer Service Bulletins No. 110‑27‑060 R2 and 110‑27‑036 R2; Brazilian AD 82‑06‑01 R8) that define the technical steps (Note 1–2; Requirement 2).","Interactions with other ADs: compliance with AD/EMB‑110/36 or specified SBs can terminate certain inspection requirements (Note 3–4).","Applicability to the entire EMB‑110 series simplifies who is covered but requires fleet‑wide action (Applicability).","Amendment history and effective date tie compliance timing to a specific regulatory update, requiring operators to track versions and previous compliance statements (Compliance; Amendment 4 statement)."],"plain_english_summary":"Requires operators of all Embraer EMB‑110 aeroplanes to inspect—and then, within a set period, modify—flight‑control trim‑tab rod bearings. Mechanically it mandates periodic disconnect-and-visual inspections until operators complete an Embraer service‑bulletin modification, which then ends the inspection requirement; the mod must occur within 1500 flight hours or eight months from 3 February 1992. The measure responds to an inflight failure attributed to bearing jamming and substitutes a one‑off modification for ongoing repetitive checks."},"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"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment stays within the original scope of addressing flight control trim system bearing failures. Amendment 4 simply updates the compliance method from ongoing inspections to requiring a permanent modification, in line with the aircraft manufacturer's country of origin directive. The scope remains focused on the same mechanical systems and aircraft type."},"complexity_factors":["Short, single-purpose directive with clear mechanical requirements","Only 4 defined references to external documents (Embraer Service Bulletins and Brazilian AD)","Simple conditional logic: repetitive inspections OR permanent modification","Straightforward compliance timeline (250-hour intervals vs 1500-hour/8-month deadline)","Minimal cross-referencing — only 2 related airworthiness directives mentioned","No nested exceptions or layered conditional requirements"],"plain_english_summary":"This safety directive for Embraer EMB-110 Bandeirante aircraft requires operators and maintenance engineers to inspect flight-control trim bearings (elevator, rudder, ailerons) for jamming every 250 flight hours at specified control-rod connections until a permanent modification is installed.  \n\nWithin 1,500 flight hours or 8 months operators must modify the aileron and rudder trim bearings per Embraer service instructions; compliance with AD/EMB-110/36 exempts further elevator-trim inspections. It addresses a bearing-jam failure that risked loss of control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-emb-110-5-amdt-4-flight-control-trim-system-bearings","history":"/api/acts/ad-emb-110-5-amdt-4-flight-control-trim-system-bearings/history","analysis":"/api/acts/ad-emb-110-5-amdt-4-flight-control-trim-system-bearings/analysis","conflicts":"/api/acts/ad-emb-110-5-amdt-4-flight-control-trim-system-bearings/conflicts","importantCases":"/api/acts/ad-emb-110-5-amdt-4-flight-control-trim-system-bearings/important-cases","documents":"/api/acts/ad-emb-110-5-amdt-4-flight-control-trim-system-bearings/documents"}}