{"id":"F2006L02216","name":"AD/LYC/113 Amdt 2 - ECi Cylinder Assemblies","slug":"ad-lyc-113-amdt-2-eci-cylinder-assemblies","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":117544,"registerId":"commonwealth-F2006L02216-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Lycoming Piston Engines","sectionType":"division","heading":"Lycoming Piston Engines","content":"### Lycoming Piston Engines\n\n| AD/LYC/113 Amdt 2 | ECi Cylinder Assemblies | 8/2006 |\n| ----------------- | ----------------------- | ------ |\n\n| Applicability: | Lycoming Engines (formerly Textron Lycoming) models 320, 360, and 540 series, parallel valve, reciprocating engines that are:A. specified in Table 1 of FAA AD 2006-12-07; andB. fitted with Engine Components Inc. (ECi) cylinder assemblies, part number (P/N) AEL65102 series \"Classic Cast\", having casting head markings EC 65099-REV-1; andC. with serial numbers (SNs) 1 through 9879 installed. (SN may have an \"L\" prefix for a long reach spark plug).Note 1: The set of numbers appearing on the cylinder, below and to the left of the SN, in the form of \"12345-67\" is not used for determining applicability.                                                                                                                                                                                                                                                                                                                                                          |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | Engines Not Repaired or Overhauled Since NewIf your engine has not been overhauled or had any major repair since new, no further action is required.Engines Overhauled or Repaired Since New1. If your engine was overhauled or repaired since new, determine if ECi cylinder assemblies, P/N AEL65102 series \"Classic Cast\", having casting head markings EC 65099-REV-1 and SNs 1 through 9879 (SN may have an \"L\" prefix for a long reach spark plug) are installed on your engine, as follows:a. Inspect the engine log books and maintenance records for reference to the subject ECi cylinder assemblies.b. If the engine log books and maintenance records did not record the P/N and SN of the cylinder assemblies, visually inspect the cylinder assemblies and verify the P/N and SN of the cylinder assemblies.c. If the cylinder assemblies are not ECi, P/N AEL65102 series \"Classic Cast\", having casting head markings EC 65099-REV-1, no further action is required. |\n\n|             | 2. If any cylinder assembly is an ECi P/N AEL65102 series \"Classic Cast\", with casting head markings EC 65099-REV-1 and a SN 1 through 9879, replace the cylinder assembly. (SN may have an \"L\" prefix for a long reach spark plug).Definition of a Replacement Cylinder AssemblyFor the purpose of this AD, a replacement cylinder assembly is defined as follows:i. A serviceable cylinder assembly made by Lycoming Engines.ii. A serviceable FAA-approved, Parts Manufacturer Approval cylinder assembly from another manufacturer.iii. A serviceable ECi cylinder assembly, P/N AEL65102 series, \"Titan\", having casting P/N AEL85099.iv. A serviceable ECi cylinder assembly, P/N AEL65102 series “Classic cast” having casting head markings EC 65099-REV-1 that has a SN 9880 or higher. (SN may have an \"L\" prefix for a long reach spark plug).3. Do not install any ECi cylinder assembly, P/N AEL65102, having casting head markings EC 65099-REV-1, that has a SN 1 through 9879 onto any engine. (SN may have an \"L\" prefix for a long reach spark plug).Note 2: FAA AD 2006-12-07 amendment 39-14632 refers. FAA AD 2006-12-07 supersedes AD 2005-26-10.Note 3: ECi Mandatory Service Bulletin 05-8 Revision 2 dated 28 February 2006 pertains to the subject of this AD. |\n| ----------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Compliance: | 1. Within 10 hours after the effective date of this AD, unless previously accomplished.2. If the cylinder assembly has fewer than 800 operating hours- in-service (HIS) on the effective date of this AD, replace the cylinder assembly at no later than 800 operating HIS. No action is required until the operating HIS reaches 800 hours.If the cylinder assembly has 800 operating HIS or more on the effective date of this AD, replace the cylinder assembly within 60 operating HIS after the effective date of this AD.3. After the effective date of this AD.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |\n|             | This Amendment becomes effective on 3 August 2006.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |\n\n| Background: | The FAA has approximately 30 reports of failure of the subject cylinder assemblies marketed by ECi. The requirements of this AD are to prevent loss of engine power due to cracks in the cylinder assemblies and possible engine failure caused by separation of a cylinder head.Amendment 2 deletes reference to FAA AD 2005-26-10 which is now superseded by FAA AD 2006-12-07. The current amendment also corrects applicability errors and makes reference to the latest revision of ECi Service Bulletin.Amendment 1 of this AD corrected a typographical error noted in the original issue of the AD and became effective on 13 April 2006.The original issue of the AD became effective on 16 February 2006. |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n20 June 2006","sortOrder":0},{"sectionNumber":"AD/LYC/113 Amdt 2","sectionType":"part","heading":"AD/LYC/113 Amdt 2","content":"## AD/LYC/113 Amdt 2","sortOrder":1},{"sectionNumber":"ECi Cylinder Assemblies","sectionType":"part","heading":"ECi Cylinder Assemblies","content":"## ECi Cylinder Assemblies","sortOrder":2},{"sectionNumber":"8/2006","sectionType":"part","heading":"8/2006","content":"## 8/2006","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This is Amendment 2 of an existing Airworthiness Directive. The amendments correct typographical errors, update references to superseded FAA directives, and clarify applicability — but do not expand the scope beyond the original safety purpose of addressing defective ECi cylinder assemblies. The core requirement (replace faulty cylinders) remains consistent with the original February 2006 issue."},"complexity_factors":["Multiple nested applicability conditions (engine model + specific part number + specific serial number range + overhaul history)","Cross-reference to foreign legislation (FAA AD 2006-12-07 and its predecessor AD 2005-26-10)","Conditional compliance timeline based on operating hours (two different thresholds: 800 hours vs 60 hours)","Four different categories of acceptable replacement parts defined in detail","Serial number parsing complexity (distinguishing relevant SN from irrelevant casting numbers, handling optional 'L' prefix)","Amendment history tracking (original issue, Amendment 1, Amendment 2 with specific corrections noted)"],"plain_english_summary":"CASA has issued a mandatory AD requiring owners/operators and maintenance organisations to check Lycoming 320/360/540 engines for certain ECi \"Classic Cast\" cylinder assemblies installed during overhaul or repair, and to replace any affected cylinders with approved alternatives.\n\nStart checks promptly and follow the AD’s replacement timing. The measure responds to multiple reports of cylinder cracking and separation that can cause in-flight engine failure, so compliance prevents potential catastrophic loss of power."},"flash_summary":{"complexity_score":7,"scope_assessment":{"changed":true,"description":"Amendment 2 updates cross‑references (replacing FAA AD 2005‑26‑10 with FAA AD 2006‑12‑07), corrects applicability errors and cites a later ECi Service Bulletin. Those edits clarify and adjust the instrument's applicability and references compared with the original issue, affecting which engines/cylinders fall within the directive and which external guidance applies."},"complexity_factors":["Serial‑numbered applicability rule (SN 1–9879), with optional “L” prefix for long‑reach spark plugs, requires precise part identification.","Model‑specific scope limited to Lycoming 320/360/540 parallel‑valve engines (cross‑referencing FAA Table 1).","Conditional exemption for engines never overhauled/repaired since new adds a records‑based gate.","Multiple staged compliance deadlines: immediate inspection (within 10 hours), replacement by 800 in‑service hours if <800, or within 60 hours if ≥800 on effective date.","Cross‑references to external instruments (FAA AD 2006‑12‑07 and ECi Mandatory Service Bulletin 05‑8 Rev 2) create dependency on other documents.","Replacement definition permits several alternative parts (Lycoming serviceable, FAA‑PMA, ECi ‘Titan’ casting P/N AEL85099, or Classic Cast with SN ≥9880), requiring verification of acceptable parts.","Prohibition on installing affected cylinders on any engine imposes ongoing procurement and maintenance constraints.","Requires both records inspection and physical inspection where records are incomplete, increasing inspection burden on maintainers.","Amendment history and corrected applicability errors mean operators and maintainers must track the current amendment to determine exact requirements."],"plain_english_summary":"Requires owners/operators of Lycoming 320, 360 and 540 series parallel‑valve engines fitted with ECi “Classic Cast” cylinder assemblies (P/N AEL65102, casting head EC 65099‑REV‑1, SNs 1–9879; optional “L” prefix) to check records or inspect cylinders and to replace any affected cylinders within short, staged deadlines; it also bans installing those SNs onto any engine. The directive aims to prevent cylinder‑head cracks/separation; the compliance costs and parts sourcing fall to operators, who may use specified serviceable Lycoming, FAA‑PMA or approved ECi replacements."}},"importantCases":[],"_links":{"self":"/api/acts/ad-lyc-113-amdt-2-eci-cylinder-assemblies","history":"/api/acts/ad-lyc-113-amdt-2-eci-cylinder-assemblies/history","analysis":"/api/acts/ad-lyc-113-amdt-2-eci-cylinder-assemblies/analysis","conflicts":"/api/acts/ad-lyc-113-amdt-2-eci-cylinder-assemblies/conflicts","importantCases":"/api/acts/ad-lyc-113-amdt-2-eci-cylinder-assemblies/important-cases","documents":"/api/acts/ad-lyc-113-amdt-2-eci-cylinder-assemblies/documents"}}