AD/LYC/113 Amdt 2 - ECi Cylinder Assemblies

The directive introduces several concepts that must be understood precisely to ensure compliance. “Applicability” is not a single condition but a layered set of criteria. The engine must fall within the Lycoming models 320, 360, and 440 series parallel valve reciprocating engines that are specified in Table 1 of FAA AD 2006-12-07. In addition, those engines must be fitted with ECi cylinder assemblies of part number AEL65102 series “Classic Cast” that have casting head markings EC 65099-REV-1, and have serial numbers 1 through 9879. The note clarifies that the set of numbers appearing below and to the left of the serial number (in the form 12345-67) is not used for determining applicability. This is a common source of error if operators mistakenly use that secondary number to identify the cylinder.

“Overhauled or repaired since new” is a critical triggering condition. Engines that have never been overhauled or had any major repair since leaving the factory are excluded from the inspection and replacement requirements. The directive does not define “major repair”, but that term carries a specific meaning under the Civil Aviation Regulations and cannot mean any minor repair. An operator whose engine had a top overhaul or cylinder replacement since new would likely fall within the requirement, but a mere oil change or accessory replacement would not. The uncertainty here creates a compliance risk: an operator who assumes their engine is unaffected because it has never been fully overhauled might miss a prior major repair that triggers the AD.

“Operating hours in service” (HIS) determines the replacement deadline. The directive uses two compliance tiers: if the cylinder assembly has fewer than 800 HIS on the effective date, replacement must occur by the time it reaches 800 HIS; if it has 800 HIS or more, replacement must occur within 60 HIS. This structure penalises operators who have already accumulated significant hours on a prohibited assembly, giving them only a short window to replace. It also creates an incentive for operators with lower-hour assemblies to track hours carefully so they can schedule replacement before exceeding the 800 hour limit.

“Replacement cylinder assembly” is defined restrictively. The list includes Lycoming serviceable units, FAA-approved PMA units from other manufacturers, ECi “Titan” assemblies (P/N AEL85099), and ECi “Classic Cast” assemblies with serial numbers 9880 or higher. Notably, an ECi “Classic Cast” assembly that falls within the prohibited serial number range cannot serve as a replacement, even if it is serviceable and was manufactured later. This definition effectively creates an approved parts pool and prohibits reinstallation of any cylinder from the suspect batch.

“Effective date” is 3 August 2006 for Amendment 2. An earlier operator who complied with Amendment 1 must check whether the applicability errors corrected in Amendment 2 affect them. For example, if the earlier version included engines that should not have been covered, or excluded engines that should have been, an operator who was not subject to Amendment 1 may now be covered, and vice versa.

“FAA AD 2006-12-07” is referenced as the source of the Table 1 engine list. This means an Australian operator must also consult the FAA directive to determine whether their specific Lycoming engine model and serial number combination falls within scope. The AD does not reproduce Table 1, so obtaining that document is necessary for full compliance.

“ECi Mandatory Service Bulletin 05-8 Revision 2 dated 28 February 2006” is also referenced. The directive does not incorporate the bulletin by reference, but it provides background. Operators may need to consult the bulletin for additional identification details or procedural instructions, though the directive itself contains the core requirements.

This directive bears directly on aircraft owners, operators, and maintainers of any aircraft that uses Lycoming 320, 360, or 440 series parallel valve reciprocating engines fitted with ECi cylinder assemblies of the specified part number and serial number range. Because the engine models are common in light general aviation aircraft, the affected population includes flying schools, private pilots, charter operators, and aerial work operators such as crop dusters or survey companies. The AD does not distinguish between commercial and private operations; every engine within the applicability criteria is subject to the same requirements.

The directive also affects maintenance organisations that carry out inspections, repairs, or overhauls on these engines. A licensed aircraft maintenance engineer (LAME) or an approved maintenance organisation must be aware of the AD when performing any work that involves the cylinder assemblies. For example, an engineer who repairs a cylinder or performs a top overhaul on an engine that has the prohibited assemblies would need to ensure the cylinder is replaced, not reused. Similarly, an engineer installing a replacement cylinder must verify that the new component falls within one of the approved categories.

Parts suppliers and distributors are affected indirectly because the AD prohibits installation of the specific ECi cylinders with serial numbers 1 through 9879. This means that stock of those cylinders cannot be sold for use on any engine, and any cylinders still in inventory become effectively worthless for airworthy installations, unless they can be exported to a jurisdiction that does not recognise this AD. Suppliers may face a loss on unsold stock.

Insurers and financiers are indirectly affected. An aircraft that is known to have non-compliant cylinders and is not in compliance with the AD may have reduced market value or may be uninsurable for certain risks. Financiers holding liens on aircraft may need to enforce compliance to protect their collateral. Insurance policies typically require the aircraft to be maintained in accordance with all applicable airworthiness directives, and failure to comply could void coverage in the event of a claim.

The manufacturer ECi is affected, although the AD does not impose direct obligations on the company. The directive essentially bans a specific batch of its products from use, which may carry reputational and liability implications. However, the definition of acceptable replacement cylinders includes later ECi products (the “Titan” and Classic Cast with SN 9880+), so ECi retains a market for those products.

The regulator (CASA) is affected in that it must monitor compliance, respond to reports of non-compliance, and potentially issue enforcement directions. The FAA is also involved, as the directive references FAA AD 2006-12-07 and relies on the failure data provided by the FAA.

Finally, passengers and third parties on the ground are affected in a safety sense, but not in a direct legal sense. They bear the risk of failure if a non-compliant cylinder remains in service, and they benefit from the reduction in risk if the AD is effectively complied with.

The directive imposes a series of duties on the person responsible for the continuing airworthiness of the aircraft, typically the owner or the chief pilot, but any maintenance organisation acting on their behalf also carries obligations. The first duty is to determine applicability by consulting the engine log books and maintenance records. If the records do not show the part number and serial number of the cylinder assemblies, the operator has a duty to perform a visual inspection to verify the identity. This inspection must be carried out within 10 hours after the effective date of the AD (3 August 2006), unless it has already been accomplished.

If the inspection reveals that the cylinder assembly meets the prohibited criteria, the duty to replace it arises. The replacement must be completed by the compliance time based on the operating hours in service on the effective date: before the assembly reaches 800 HIS (if it had fewer than 800 on the effective date), or within 60 HIS (if it already had 800 or more on the effective date). The duty includes selecting a replacement cylinder from the approved list. The operator does not have a duty to replace cylinders that are not among the prohibited batch; the AD is limited to that specific batch.

There is also a continuing duty not to install any prohibited cylinder assembly onto any engine after the effective date. This applies whether the cylinder is new, used, or overhauled; the serial number range is the sole disqualifier.

The aircraft owner or operator has the right to choose between the different categories of replacement cylinder assemblies. The AD does not mandate the use of Lycoming parts, nor does it require a specific brand. This preserves some competition among suppliers. The operator also has the right to apply for an alternative means of compliance (AMOC) under CASR Part 21, although the directive does not mention this explicitly. Standard CASA practice allows an operator to propose a different method of achieving the safety outcome, subject to CASA approval. This could be relevant if, for example, a specific engine is not flown enough to accumulate hours and the operator wishes to inspect rather than replace, or if a replacement part is unavailable.

The operator does not have a right to delay replacement beyond the prescribed HIS limits, except by obtaining an AMOC. Nor does the operator have a right to destroy or dispose of the removed cylinders in a manner that would allow them to be reinstalled on another engine; the prohibition on installation applies to any engine, not just the specific aircraft.

The directive does not impose a duty to notify CASA that compliance has been achieved, but the operator must document compliance in the aircraft log books, as is customary for all airworthiness directives. Failure to maintain proper records could count as a separate compliance failure.

The source text does not list a penalty dollar amount or specific enforcement mechanism, but as an Airworthiness Directive issued under the Civil Aviation Regulations, non-compliance exposes the aircraft operator and the licensed maintenance engineer to enforcement action under the Civil Aviation Act 1988 and the Civil Aviation Regulations. The Act provides for criminal penalties for operating an aircraft that does not meet airworthiness requirements, as well as civil penalties up to significant sums for each day of contravention. In practice, CASA can issue a direction to ground the aircraft until the AD is complied with, and can suspend or cancel the aircraft’s certificate of airworthiness for continued non-compliance.

The enforcement posture is shaped by the safety rationale. The background notes approximately 30 reports of failure of the subject cylinder assemblies, including cylinder head separation. The risk is catastrophic engine failure in flight. Regulators treat such ADs with high priority, and an inspector who discovers non-compliance during a ramp check or maintenance review will likely issue an enforcement action rather than a warning.

The operator also faces liability beyond regulatory penalties. If an accident occurs because of a cylinder failure that could have been prevented by compliance with the AD, the operator may face civil claims for negligence by injured parties or their estates. Insurance policies typically exclude coverage for losses arising from non-compliance with airworthiness directives, so the operator could bear the entire financial loss.

The directive also indirectly exposes ECi to potential product liability claims from operators who suffered economic loss due to the grounding or replacement costs, although the AD itself does not create a private right of action. The background does not indicate whether ECi reimbursed operators for the failed cylinders, but the fact that the AD permits later ECi products as replacements suggests the company continued to supply the market.

Maintenance organisations that install prohibited cylinders after the effective date could face action under the maintenance regulations, including suspension of their authorisation, and personal liability for the engineer who certified the work.

The directive does not create a self-reporting obligation, but if an operator discovers that a prohibited cylinder is installed and they do not take corrective action within the compliance time, they are in breach. The 10 hour initial inspection deadline means that the enforcement clock starts very soon after the effective date. An operator who is unaware of the AD because they do not monitor CASA publications is not excused; ignorance of an airworthiness directive is not a defence.

This directive sits within a hierarchy of Australian aviation law. It is issued by CASA under the Civil Aviation Act 1988 and the Civil Aviation Regulations 1988 (specifically, continuing airworthiness provisions). It is a mandatory directive that overrides any less restrictive maintenance instructions or manufacturer’s recommendations. For example, if an engine manufacturer’s overhaul manual states that a cylinder is serviceable up to 2000 hours without inspection, this AD overrides that for the specific cylinder assemblies.

The directive interacts with the FAA’s AD 2006-12-07. The Australian directive incorporates by reference the Table 1 of the FAA AD for the list of affected engine models. This means that the scope of the Australian requirement is partly defined by a US regulation. Any amendment to the FAA AD that changes Table 1 would not automatically change the Australian directive; a further CASA amendment would be needed. However, in practice, the two regulators often align, and operators of US-registered aircraft in Australia would also be subject to the FAA AD. For Australian-registered aircraft, compliance with the CASA AD is sufficient, but the operator may need to obtain the FAA AD to understand the engine list.

The directive also references ECi Mandatory Service Bulletin 05-8 Revision 2. This service bulletin is not itself a legal requirement, but the AD uses it as background and to identify the affected parts. The service bulletin may contain inspection or identification procedures that operators can use, but the AD’s own text contains the binding requirements.

The directive interacts with the Australian maintenance regulations, such as CASR Part 42 (Continuing Airworthiness) and Part 145 (Approved Maintenance Organisations). Organisations that hold an approval must have procedures to ensure they receive and comply with all applicable airworthiness directives. Failure to apply an AD during a scheduled maintenance check would be a breach of the maintenance regulations and could result in the organisation’s approval being suspended.

The directive also interacts with contractual obligations between aircraft owners and their lessors, insurers, or buyers. A lease agreement may require the lessee to maintain the aircraft in compliance with all airworthiness directives. Non-compliance could be a default under the lease. Similarly, a purchase agreement may include a representation that the aircraft has no outstanding ADs; if a prohibited cylinder is discovered post-sale, the buyer may have a claim for misrepresentation.

The directive does not directly interact with criminal law beyond the Civil Aviation Act, but if a cylinder separation causes death or injury, the operator could face charges under state criminal laws for manslaughter if gross negligence is proven. The existence of a known, unaddressed AD would be strong evidence of a breach of duty.

The directive does not mention any interaction with the Competition and Consumer Act 2010, but the ban on installing certain ECi cylinders could theoretically affect competition. ECi’s later models are still permitted, so the effect is limited to the specific batch. There is no obvious anti-competitive purpose or effect beyond the safety rationale.

The source text provides a clear chronology. The original issue of the AD became effective on 16 February 2006. Amendment 1 became effective on 13 April 2006 and corrected a typographical error. Amendment 2 became effective on 3 August 2006 and made three changes: it deleted the reference to FAA AD 2005-26-10 (which had been superseded by FAA AD 2006-12-07), corrected “applicability errors”, and updated the reference to the latest revision of ECi Service Bulletin (Revision 2 dated 28 February 2006).

The applicability errors corrected in Amendment 2 are not itemised in the source, but they could involve changes to the engine model list, the serial number range, or the definition of replacement cylinders. This is significant for operators who complied with Amendment 1. If Amendment 2 expanded the applicability, an operator who thought they were exempt may now be covered. Conversely, if it narrowed the applicability, some operators who replaced their cylinders unnecessarily may have incurred costs that could have been avoided. The directive does not provide a grace period for those who acted under the earlier version; the compliance times run from the effective date of Amendment 2, but the inspection and replacement may already be due if the operator had not yet acted.

The amendment history also shows that the AD was updated to align with the latest ECi Service Bulletin. This suggests that the regulator is responsive to manufacturer developments. However, it also imposes an additional information-gathering burden: operators must ensure they are using the correct revision of the service bulletin when verifying part numbers or performing inspections.

The sequence of amendments is relatively compressed, spanning only about six months from original to Amendment 2. This indicates that the regulator identified issues quickly and moved to correct them. It also means that operators who did not continuously monitor CASA notices during that period may have missed one or both amendments. The effective date of Amendment 2 (3 August 2006) started the 10 hour inspection clock from that date, not from the original effective date. For engines already in service under the original AD, the operator should have already inspected and possibly replaced the cylinders. If they had not, they are now required to act within the new compliance period.

The AD does not include a sunset or review date. It remains in effect until superseded or withdrawn. The source does not indicate whether the AD was ever withdrawn or further amended after 2006. An operator reading this today must confirm they are using the latest version, which may be available from CASA’s AD database.

The amendment history is relevant for litigation: if an operator complied with Amendment 1 but a later accident occurred involving a cylinder that should have been inspected under Amendment 2’s corrected applicability, the operator’s earlier compliance might not be a defence if the correction was substantive. A court would look at whether the operator exercised reasonable diligence in staying current with amendments.

The source text does not mention any litigation related to this directive. However, several avenues of potential litigation are relevant. An operator who suffers an engine failure because a prohibited cylinder separates could bring a product liability claim against ECi for manufacturing or design defects. The AD itself is evidence that the regulator considered the cylinders unsafe, which could support the plaintiff’s case. The defence might argue that the operator failed to comply with the AD and so contributed to the loss, but if the cylinder failed before the compliance deadline, the manufacturer could still be liable.

Another potential claim is by an operator against a maintenance organisation that failed to inspect or replace a prohibited cylinder during a scheduled maintenance check. If the AD was applicable and the maintenance organisation missed it, the operator could sue for breach of contract or negligence. The maintenance organisation might argue that the operator did not provide the AD or that it was not listed in the work scope. This underscores the importance of clear communication between owner and maintainer.

A third potential area is judicial review of the AD itself. An affected operator or ECi could challenge the validity of the AD on grounds that it was procedurally unreasonable, that CASA failed to consider alternatives, or that the directive was issued without proper consultation. In Australia, such challenges under the Administrative Decisions (Judicial Review) Act 1977 are possible, but the courts defer to the regulator’s safety expertise, so success is rare unless there is a clear error of law. The background only says “approximately 30 reports of failure”, which might be criticised as vague, but it is unlikely to be sufficient to overturn the AD.

There is also the possibility of cross-border litigation. If an Australian operator purchases a cylinder from a US supplier that falls within the prohibited range and the AD was not disclosed, the operator might have a claim for misrepresentation or breach of warranty. The supplier could argue that the AD is a matter of Australian law and the buyer should have known.

The lack of cited litigation in the source is not surprising because administrative challenges to ADs are uncommon; operators usually comply to keep their aircraft flying. The cost of grounding and replacement typically dwarfs the cost of a legal challenge. Moreover, the AD specifically provides for approved replacements, so an operator who opposes the AD still has a path to compliance without resorting to litigation.

In the United States, similar ADs have been challenged, but Australian courts have not produced published decisions on this particular directive. An operator should not rely on the absence of litigation as evidence of the AD’s correctness or proportionality.

Several features of the directive can trap an unwary operator. The first is the distinction between engines that have been overhauled or repaired since new and those that have not. An operator whose engine received a major top overhaul or had a single cylinder replaced after new is likely caught by the inspection requirement, even if the rest of the engine is original. The directive does not define “repaired”, but the term “major repair” in the regulations captures many common cylinder-related repairs. Operators may incorrectly assume that only a full overhaul triggers the requirement.

The second gotcha is that the set of numbers appearing below and to the left of the serial number, in the format 12345-67, is officially not used for determining applicability. An operator who reads that number and assumes it is the serial number may incorrectly identify their cylinder as non-compliant or compliant. The actual serial number is the single digit or five-digit number (possibly with an L prefix) that appears on the cylinder casting head near the part number. Misidentification could lead to unnecessary replacement or failure to replace.

The third trap is the definition of replacement cylinder assemblies. An operator who replaces a prohibited cylinder with an ECi “Classic Cast” cylinder that happens to have a low serial number (say, 500) unknowingly installs another prohibited cylinder, because the replacement itself must have serial number 9880 or higher, even if the new cylinder is from a different batch. The operator must check the serial number of the replacement, not just rely on the part number and casting mark.

The fourth trap involves the compliance deadline. Cylinders with fewer than 800 HIS on the effective date must be replaced by the time they reach 800 HIS. If the engine is flown infrequently, the operator might think they have ample time, but the milestone is hours, not calendar time. An operator who does not track HIS accurately may exceed 800 HIS before scheduling replacement, thus violating the AD. Conversely, cylinders with 800 or more HIS on the effective date must be replaced within 60 HIS, which for a high-use engine could be as short as a few weeks.

The fifth trap is the 10 hour inspection deadline. Even for engines that have fewer than 800 HIS and do not yet require replacement, the initial inspection of records and visual check must be completed within 10 hours after the effective date. An operator who ignores the AD beyond that window is in breach from the start, even if the replacement is not yet due.

The sixth trap is the reliance on maintenance records. If the logs do not record the part number and serial number of the cylinders, the operator must visually inspect them. This means removing cowlings and possibly spark plugs to read the casting marks. An operator who assumes that the absence of a record means the cylinders are not ECi avoids the inspection only to later discover they have prohibited cylinders after the inspection deadline has passed.

The seventh trap is the interaction with the FAA AD. The Australian AD only says “specified in Table 1 of FAA AD 2006-12-07”. An operator must obtain that FAA AD to determine if their engine model is included. If they rely solely on the Lycoming model name (e.g., O-320) without checking the table, they may miss that some variants are excluded or included.

The eighth trap is that Amendment 2 corrects applicability errors from earlier versions. An operator who complied with Amendment 1 and thought their engine was not covered may now be covered by Amendment 2, or vice versa. The operator must re-check applicability against Amendment 2, not the original.

The ninth trap is that the AD does not specify what to do with engines that are installed on aircraft not currently in service (e.g., stored). The compliance time is based on operating hours, which may be zero. If the engine has zero HIS on the effective date, the cylinder replacement is not required until it reaches 800 HIS, but the inspection must still be done within 10 hours after the effective date? Yes, because the inspection is required regardless of hours. For a stored engine, “operating hours in service” may be ambiguous, but it likely means hours since new or since last overhaul. The operator should still inspect the records and the cylinders within 10 hours after the effective date, even if the engine is not flown.

Compliance can be broken into a series of concrete steps that should be documented in the aircraft maintenance log. The first step is to identify the engine model and serial number and verify that it falls within the models listed in Table 1 of FAA AD 2006-12-07. If the engine is not one of those models, no further action is required under this AD, but consult the applicable FAA AD anyway. If it is, proceed.

Second, determine whether the engine has been overhauled or has had any major repair since new. Review the engine log books from the time of manufacture. “Since new” means since the engine left the Lycoming factory, not since the last overhaul. If the engine has never been overhauled or had any major repair, no further action is required under this AD. Record this determination.

Third, if the engine has been overhauled or had a major repair, inspect the engine log books and maintenance records for references to ECi cylinder assembly P/N AEL65102 series “Classic Cast” with casting head markings EC 65099-REV-1. If the records show that such cylinders are installed and their serial numbers are recorded, check whether any serial number falls between 1 and 9879 (including an L prefix). If no such cylinders are recorded, but the records do not positively identify the cylinders by part number and serial number, proceed to visual inspection.

Fourth, perform a visual inspection of each cylinder assembly. This may require removing cowlings and possibly spark plugs to read the casting head markings and the serial number. The serial number is the single or five-digit number near the part number, not the longer number in the format 12345-67. If the casting mark is EC 65099-REV-1 and the part number is AEL65102 series, note the serial number. Also note whether it is “Classic Cast” (the AD specifies that casting head markings identify the type). If the cylinder is not ECi or not of that part number/serial number, no further action for that cylinder.

Fifth, for any cylinder that matches the prohibited criteria (P/N AEL65102 series Classic Cast, casting head EC 65099-REV-1, SN 1-9879), calculate the operating hours in service (HIS) on the effective date (3 August 2006). This is the total time the engine has operated since new or since last overhaul (consistent with the engine time record). If the cylinder has fewer than 800 HIS on the effective date, note the remaining hours until 800 HIS. Schedule replacement before the cylinder reaches 800 HIS. If the cylinder has 800 or more HIS on the effective date, schedule replacement within 60 HIS after the effective date. The replacement must be completed by the earlier of the deadline or before the next flight after the deadline.

Sixth, select a replacement cylinder from the approved list: a serviceable Lycoming cylinder, a serviceable FAA-PMA cylinder from another manufacturer, a serviceable ECi “Titan” assembly (P/N AEL85099), or a serviceable ECi “Classic Cast” assembly with serial number 9880 or higher. Ensure that the replacement cylinder is properly documented with its part number, serial number, and airworthiness approval tag. Do not install any prohibited cylinder as a replacement.

Seventh, perform the replacement in accordance with the engine manufacturer’s instructions and the applicable maintenance regulations. After replacement, update the engine log books to record that the AD has been complied with, including the date, the aircraft and engine details, the serial numbers of removed and installed cylinders, and the HIS at the time of replacement.

Eighth, for any cylinder that is not replaced because it has fewer than 800 HIS but is otherwise prohibited, monitor the HIS and schedule replacement before the 800 hour mark. Keep a log of the current HIS and the deadline. If the aircraft is flown so infrequently that the 800 HIS may not be reached for years, the AD still applies, and the replacement must be done before 800 HIS is reached, even if that takes many years.

Ninth, after the effective date, do not install any prohibited cylinder onto any engine. This includes cylinders that were originally installed but removed during an inspection or repair; they cannot be reinstalled unless they are from serial number 9880 or higher.

Tenth, consider whether an alternative means of compliance (AMOC) is appropriate if the replacement deadline cannot be met due to part unavailability or other reasons. Submit a written request to CASA with a proposal explaining how the safety outcome will be achieved by a different method. CASA may approve an extension or a different inspection schedule. Do not assume that an extension is automatic; the aircraft must remain grounded until the AMOC is approved.

Finally, maintain all records for the life of the aircraft. If the aircraft is sold, the new owner must be informed of the AD compliance status. Failure to transfer this information could lead to the new owner unknowingly operating in breach of the AD.