{"id":"F2006B09483","name":"AD/EMB-110/43 Amdt 2 - Elevator Balance Weight Arm","slug":"ad-emb-110-43-amdt-2-elevator-balance-weight-arm","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":53995,"registerId":"commonwealth-F2006B09483-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/EMB-110/43 Amdt 2 - Elevator Balance Weight Arm","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-110/43\n\nAmdt 2\n\n  \nElevator Balance Weight Arm 3/92\n\nApplicability: Models EMB-110K1, EMB-110P1 and EMB-110-P2; equipped with 10 degrees dihedral stabilizer, but not incorporating balance weight arms P/N 110-3012-01-15 and P/N 110-3012-01-16.\n\nRequirement: 1. Inspect in accordance with Embraer Alert Service Bulletin 110-027-0088.\n\n2. Replace the elevator balance weight arms P/N 110-3012-01-01 and\n\nP/N 110-3012-01-06 with P/N 110-3012-01-15 and P/N 110-3012-01-16 arms.\n\nNote: Brazil CTA AD 90-05-03R1 Amdt 39-684 refers.\n\nCompliance: 1. At intervals not exceeding 150 hours time in service.\n\n2. Within 600 hours time in service after 12 January 1992. The compliance of the previous issue of this Directive was:\n\nwithin the next 10 hours time in service after 23 May 1990 , and thereafter at intervals not exceeding 150 hours time in service.\n\nBackground: There have been reports of cracks in the elevator balance weight arms. This condition could result in a failure, followed by extreme vibration or flutter and loss of control of the aircraft. Amendment 1 was issued to align this Directive with a revision of the relevant country of origin AD, which requires terminating action in lieu of ongoing inspections.\n\nAmendment 2 is issued to correct an error in the Compliance 2 calendar time.","sortOrder":0}],"analysis":{"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":2,"scope_assessment":{"changed":false,"description":"This is Amendment 2 to an existing Airworthiness Directive. The amendment is purely corrective—fixing a calendar date error in Compliance 2. The scope remains identical to the original directive: addressing cracked elevator balance weight arms on specific Embraer aircraft. No expansion of scope has occurred."},"complexity_factors":["Single technical subject matter (one aircraft component)","Only 2 substantive requirements (inspect and replace)","Limited applicability (3 specific aircraft models with specific configuration)","Simple compliance structure (time-based intervals)","No nested definitions or cross-references to other legislation","Background explanation provided in plain language"],"plain_english_summary":"This AD mandates inspection and replacement of specific elevator balance weight arms on Embraer EMB-110 K1/P1/P2 aircraft with 10° dihedral that still have the old part numbers. Operators must inspect per Embraer’s service bulletin every 150 flight hours and replace the old arms within 600 flight hours (deadline tied to 12 Jan 1992). Cracked arms can cause dangerous flutter and loss of control; this amendment corrects a prior date error."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Amendment 2 corrects an error in the stated calendar timing for the replacement deadline; it does not alter which aircraft are affected or the required actions (inspection and replacement). The Directive's substantive scope—inspection intervals and terminating replacement—remains as set by the earlier amendment."},"complexity_factors":["Technical specificity of affected parts: multiple explicit part numbers (P/N 110-3012-01-01, -06, -15, -16).","Limited applicability: applies only to EMB-110K1, EMB-110P1 and EMB-110P2 with 10° dihedral that lack certain P/Ns.","Dual compliance regime: recurring inspections (150 hours TIS) plus a terminating replacement deadline (amended calendar time).","Dependence on external documents: refers to Embraer Alert Service Bulletin 110-027-0088 and Brazil CTA AD 90-05-03R1 Amdt 39-684 for inspection/repair procedures.","Regulatory history: amendment corrects a prior calendar-time error, requiring readers to reconcile versions for exact deadlines."],"plain_english_summary":"This airworthiness directive requires operators of certain Embraer EMB‑110K1/P1/P2 aeroplanes (those with a 10° stabiliser dihedral that do not have specified balance weight arm part numbers) to perform regular inspections and to replace the elevator balance weight arms. It responds to reported cracks that could lead to extreme vibration, flutter and potential loss of control.\n\nOperators pay for inspections and replacement parts; the directive sets a recurring inspection interval and a deadline for terminating replacement, and it relies on an Embraer service bulletin and a Brazil CTA AD for the technical procedure."}},"importantCases":[],"_links":{"self":"/api/acts/ad-emb-110-43-amdt-2-elevator-balance-weight-arm","history":"/api/acts/ad-emb-110-43-amdt-2-elevator-balance-weight-arm/history","analysis":"/api/acts/ad-emb-110-43-amdt-2-elevator-balance-weight-arm/analysis","conflicts":"/api/acts/ad-emb-110-43-amdt-2-elevator-balance-weight-arm/conflicts","importantCases":"/api/acts/ad-emb-110-43-amdt-2-elevator-balance-weight-arm/important-cases","documents":"/api/acts/ad-emb-110-43-amdt-2-elevator-balance-weight-arm/documents"}}