{"id":"F2007L01373","name":"AD/SUPERIOR/1 Amdt 2 - Cylinder Assemblies","slug":"ad-superior-1-amdt-2-cylinder-assemblies","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":65685,"registerId":"commonwealth-F2007L01373-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Superior Air Parts Piston Engines","sectionType":"division","heading":"Superior Air Parts Piston Engines","content":"### Superior Air Parts Piston Engines\n\n| AD/SUPERIOR/1 Amdt 2 | Cylinder Assemblies | 6/2007 |\n| -------------------- | ------------------- | ------ |\n\n| Applicability: | Superior Air Parts (SAP) O-360 and IO-360 series reciprocating engines.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Determine the part number (P/N) and the serial number (S/N) of the cylinder assemblies installed in your engine, in accordance with the procedures detailed in Superior Air Parts, Inc Mandatory Service Bulletin (MSB) B06-01 Revision E dated 24 January 2007.Remove from service any cylinder assemblies that are affected by Superior Air Parts MSB B06-01 Revision E.The affected cylinder assemblies are known to have been manufactured between April 2005 and November 2005.2. Do not install any cylinder assembly that is affected by Superior Air Parts MSB B06-01 Revision E, into any engine.Note 1: FAA AD 2007-04-19 R1 Amendment 39-15005 dated 23 March 2007 refers. |\n| Compliance:    | 1. Before cylinder assemblies reach 150 hours total time in service (TTIS).Note 2: For aircraft with engine cylinder assemblies that have greater than 150 hours total time in service (TTIS), special flight permits may be issued to ferry the aircraft to a maintenance base.2. After the effective date of this AD.                                                                                                                                                                                                                                                                                                                                                                  |\n|                | This Amendment becomes effective on 7 June 2007.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |\n| Background:    | This AD results from discovery of nine separated SAP cylinder assemblies installed in TCM 470, 520, and 550 series reciprocating engines and one separated SAP cylinder assembly installed in Lycoming Engines 320, 360, and 540 series engines. CASA is issuing this AD to prevent cylinder separation that can lead to engine failure, a possible engine compartment fire, and damage to the aeroplane.The current amendment corrects manufacturing date range and makes a few editorial changes.                                                                                                                                                                                      |\n\n|     | Amendment 1 of this AD made reference to the cylinders assemblies detailed in the manufacturer’s service bulletin and became effective on 5 March 2007.The original issue of this AD became effective on 2 March 2007. |\n| --- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nDavid Punshon  \nDelegate of the Civil Aviation Safety Authority\n\n26 April 2007","sortOrder":0},{"sectionNumber":"AD/SUPERIOR/1 Amdt 2","sectionType":"part","heading":"AD/SUPERIOR/1 Amdt 2","content":"## AD/SUPERIOR/1 Amdt 2","sortOrder":1},{"sectionNumber":"Cylinder Assemblies","sectionType":"part","heading":"Cylinder Assemblies","content":"## Cylinder Assemblies","sortOrder":2},{"sectionNumber":"6/2007","sectionType":"part","heading":"6/2007","content":"## 6/2007","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The amendment corrected the manufacturing date range and made editorial changes but did not materially broaden the AD’s substantive reach. The instrument remains narrowly targeted at SAP O-360 and IO-360 cylinder assemblies identified by MSB B06-01 Rev E and retains the same required actions (identify, remove affected parts, and ban reinstallation). It therefore did not grow significantly beyond its original safety-removal purpose."},"complexity_factors":["Short, single-issue AD focused on one component (cylinder assemblies)","Relies on one external document: Superior Air Parts Mandatory Service Bulletin B06-01 Revision E (procedural detail delegated to the MSB)","One clear compliance deadline tied to a single metric (150 hours TTIS)","Limited exceptions: special flight permits for aircraft already over 150 TTIS","Cross-reference to FAA AD 2007-04-19 R1 (external cross-reference)","Amendment only corrects manufacturing date range and editorial points (minor amendment)"],"plain_english_summary":"**What this instrument does (mechanically)**\n\n- Requires owners/operators of aircraft with Superior Air Parts (SAP) O-360 and IO-360 series piston engines to identify the part number (P/N) and serial number (S/N) of the cylinder assemblies installed, following the procedures in Superior Air Parts Mandatory Service Bulletin (MSB) B06-01 Revision E (24 January 2007). (Requirement)\n- Requires removal from service of any cylinder assemblies that are identified as affected by MSB B06-01 Revision E. (Requirement)\n- Prohibits installation of any cylinder assembly identified as affected by MSB B06-01 Revision E into any engine. (Requirement)\n- Sets the compliance deadline: affected cylinder assemblies must be inspected and removed before they reach 150 hours total time in service (TTIS). For engines already over 150 TTIS, a special flight permit may be issued to ferry the aircraft to maintenance. (Compliance)\n- The AD became effective 7 June 2007 and refers to FAA AD 2007-04-19 R1 Amendment 39-15005 (Note 1). (Compliance / Note)\n\n**Who this affects**\n\n- Aircraft owners and operators that have SAP O-360 or IO-360 series engines with SAP cylinder assemblies installed. (Applicability)\n- Maintenance organisations and licensed mechanics who must carry out the identification, inspection and removal procedures stated in the manufacturer’s MSB. (Requirement)\n- Parts suppliers and repair stations that supply or fit replacement cylinder assemblies (they must not supply or install any cylinder identified as affected). (Requirement)\n\n**Why it matters (stated purpose + mechanical effect)**\n\n- CASA says the AD responds to discovered incidents of cylinder separation (broken-off cylinder assemblies) on certain SAP cylinders and equivalent installations in other engine makes. Cylinder separation can lead to engine failure, possible engine-compartment fire and aircraft damage. The AD removes suspect parts from service to reduce that risk. (Background)\n\n**Practical effects, costs and incentives**\n\n- Who pays: aircraft owners/operators pay for the inspection, parts removal/replacement, labour, and any downtime or ferry flights. (Requirement / Compliance)\n- Who decides on action: the AD prescribes action; owners/operators and maintenance providers must follow the MSB procedures to comply. CASA enforces compliance under the AD. (Requirement / Compliance)\n- Timing pressure: the before-150-hours TTIS deadline creates a near-term compliance burden for engines with low hours remaining on affected cylinders; operators must prioritise these inspections and any replacement work. (Compliance)\n- Supply and price effects: removing a cohort of cylinder assemblies from service may increase demand for replacement cylinders or overhauled cores; this can raise procurement costs and increase downtime if replacement stock is limited. (Requirement)\n- Work opportunities for maintenance providers: independent maintenance shops and authorised repair stations will perform the inspections and replacement work required by the AD. (Requirement)\n- Substitution and compliance behaviour: operators can comply by installing compliant replacement cylinders, or (if already >150 TTIS) by obtaining a special flight permit to reposition the aircraft for maintenance. There is no discretionary opt-out. (Compliance)\n- Implementation risk: correct identification requires accurate recording of P/N and S/N as per the MSB; mistakes in identification risk either unnecessary removals or missed defective cylinders. (Requirement)\n- Administrative burden: reliance on the manufacturer’s MSB (B06-01 Rev E) and a cross-reference to an FAA AD means operators must consult multiple documents to confirm affected serial ranges and procedures. (Requirement / Note)\n\n**Trade-offs and opportunity costs**\n\n- The AD reduces the risk of in-service cylinder separation at the cost of inspections, potential early replacement of parts, and associated aircraft downtime. It concentrates costs on the relatively small set of affected operators (those with SAP O-360/IO-360 cylinder assemblies manufactured in the identified manufacture-date window). (Requirement / Background)\n\n**What changed in this amendment**\n\n- The current amendment corrects the manufacturing date range for affected cylinder assemblies and makes some editorial changes to the AD. It does not add new types of actions or broaden the classes of engines beyond the SAP O-360/IO-360 applicability stated. (Background)\n\n**Immediate steps an affected operator should take**\n\n- Consult Superior Air Parts MSB B06-01 Revision E (24 January 2007) to find the exact P/N and S/N ranges identified as affected, then inspect engines to identify installed cylinder assemblies. (Requirement)\n- Remove any affected cylinder assemblies before they reach 150 TTIS and do not install any affected assemblies going forward. (Requirement / Compliance)\n- If an aircraft already has affected cylinders with greater than 150 TTIS, arrange a special flight permit only to ferry to a maintenance base for compliance work. (Compliance)\n\n(References in parentheses indicate the AD sections: Applicability, Requirement, Compliance, Note, Background.)"},"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 of an existing AD. The document explicitly states this amendment only 'corrects manufacturing date range and makes a few editorial changes' compared to Amendment 1. The original AD was issued on 2 March 2007. The scope remains tightly focused on the specific defective cylinder assemblies from the identified manufacturing period. No expansion of regulatory scope has occurred."},"complexity_factors":["Very short document (approximately 300 words)","Only 2 main requirements with clear sequential numbering","Single defined term used (TTIS — Total Time In Service, explained in context)","No nested exceptions or conditional logic beyond the 150-hour threshold","One cross-reference to an FAA AD for background only, not for operative requirements","Straightforward applicability section with specific engine models listed","Compliance deadline is a simple time-in-service limit or effective date"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspection and removal of certain Superior Air Parts O‑360/IO‑360 cylinder assemblies manufactured Apr–Nov 2005. It affects owners, operators and maintenance personnel using these common general aviation engines.\n\nThe AD requires identifying affected cylinders per the manufacturer’s bulletin and removing any defective units (and prohibiting their installation) to prevent in‑flight cylinder separation, engine failure, fire, and potential loss of aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/ad-superior-1-amdt-2-cylinder-assemblies","history":"/api/acts/ad-superior-1-amdt-2-cylinder-assemblies/history","analysis":"/api/acts/ad-superior-1-amdt-2-cylinder-assemblies/analysis","conflicts":"/api/acts/ad-superior-1-amdt-2-cylinder-assemblies/conflicts","importantCases":"/api/acts/ad-superior-1-amdt-2-cylinder-assemblies/important-cases","documents":"/api/acts/ad-superior-1-amdt-2-cylinder-assemblies/documents"}}