AD/CESSNA 185/42 - Seat Rail Latch - CANCELLED

The cancellation primarily affects operators and owners of Cessna 185 series aeroplanes that were subject to the original AD. The original AD targeted "the pilot and co‑pilot seats" on Cessna 185 series aeroplanes and required inspections to ensure "that both seat latch pins fully engage the seat rail and locks the seat securely in position." Those persons who were required to carry out that inspection under the original AD,aircraft owners, operators, maintenance organisations, and maintenance engineers who performed inspections in accordance with Cessna SEB 85‑20,are the parties affected by the cancellation, because the regulatory obligation created by the AD is being removed.

The notice does not identify other classes of stakeholders such as manufacturers, suppliers, or regulators beyond CASA, but it does implicitly affect Cessna (as the author of the referenced SEB) by terminating a regulatory requirement that referenced a manufacturer document. The statement "As all aircraft would have been inspected by now" frames CASA's expectation about the state of compliance in the affected fleet; that expectation, if correct, means that the owners/operators who previously bore the inspection obligation have already performed the required work. The instrument does not record any new obligations, nor does it specify continuing record‑keeping, reporting or inspection duties.

No mention is made in the source of affected third parties such as passengers or insurers, nor does the notice set out any transitional arrangements for aircraft that might not have been inspected. The only named decisionmaker is the CASA delegate who signed the cancellation. The cancellation date and the dates in the original AD (compliance within 25 hours after 2 April 1986) delineate the temporal window in which affected parties were required to act.

The text describes the original duty that the AD imposed and then withdraws it; it does not create new duties or rights.

• Duty previously imposed: The original AD required an inspection of pilot and co‑pilot seats "in accordance with Cessna SEB 85‑20, to ensure that both seat latch pins fully engage the seat rail and locks the seat securely in position." That duty had a specific compliance timeframe: "within 25 hours time in service after 2 April 1986." Those were the operative requirements while the AD was in force.

• Withdrawal of duty: The document states clearly, "Requirement: CANCELLED. This AD is cancelled on 3 July 2008." That declaration removes the AD’s inspection requirement from continuing regulatory force as of the cancellation date. After that date, the particular AD no longer imposes an enforceable duty under its own terms.

• Rights implied by cancellation: The source does not expressly create affirmative rights, exemptions, or indemnities for owners/operators. By cancelling the AD, the regulator removes the specific duty under that instrument; affected parties therefore cease to owe that particular inspection obligation. The notice does not waive other potential legal duties (for example, duties under broader maintenance or airworthiness frameworks), nor does it state whether the cancellation affects any records, approvals, or continuing airworthiness documentation. The document does not specify a requirement to retain evidence of past compliance, nor does it assign any continuing surveillance role to CASA.

• Discretion and decision authority: The signature block names a CASA delegate as the acting official ("David Villiers, Delegate of the Civil Aviation Safety Authority"). The document therefore records an administrative exercise of delegated authority to cancel the AD.

• Presumptions in the instrument: The background contains a factual presumption used to justify the cancellation: "As all aircraft would have been inspected by now, the unsafe condition no longer exists." That is presented as the reason for removing the obligation but is stated as a presumption rather than as verification of each aircraft's compliance status. The source does not set out an audit or verification mechanism tied to that presumption.

The source document does not include any express penalties, sanctioning provisions, or enforcement mechanisms. It is a cancellation notice that records the removal of a prior regulatory requirement; the text reads "Requirement: CANCELLED. This AD is cancelled on 3 July 2008." No fines, suspension powers, or enforcement steps are recited in the cancellation notice itself.

Because the source is limited to the cancellation and the background justification, it is silent on the enforcement posture that applied while the AD was live (for example, whether non‑compliance with the original 1986 AD attracted specified sanctions or regulatory consequences). The only enforcement‑related element the document contains is an implicit reliance on historical compliance: the background asserts that "all aircraft would have been inspected by now," which signals an expectation that the regulated population complied with the prior directive. The cancellation therefore rests on an administrative view about the state of compliance rather than on any enforcement action described in this document.

The notice identifies the decision authority as a CASA delegate, which indicates administrative control over the AD lifecycle (issuance and cancellation). Beyond that, the document contains no procedural instructions for enforcement, no penalties for failure to comply with the now‑cancelled AD, and no reference to remedial measures in the case where an aeroplane had not been inspected. The cancellation is therefore an administrative closure of the AD record, and the source is silent on retrospective enforcement or on whether evidence of prior compliance should be retained.

The instrument references a manufacturer technical document and an earlier AD, and through those references it interface with other regulatory and technical materials, as described in the source.

• Reference to manufacturer material: The original AD required inspection "in accordance with Cessna SEB 85‑20." That shows the AD functioned by incorporating or mandating compliance with a specified manufacturer service engineering bulletin as the practical standard for the inspection. The cancellation removes the regulatory mandate to follow that bulletin insofar as it was required by the AD.

• Relationship to the prior AD: The notice is itself part of the AD lifecycle: a regulatory instrument that cancels a prior AD issued in 1986. The document therefore interacts with the earlier AD by terminating its continuing regulatory effect as of the stated cancellation date, 3 July 2008.

• Interaction with continuing airworthiness frameworks: The source does not mention broader statutory provisions, but by cancelling the AD it changes the set of mandatory directives applicable to the Cessna 185 fleet under the AD regime that is the operative context of this document. The text does not specify whether other statutory maintenance and airworthiness obligations remain unaffected; it does not state any interplay with certificates, approvals, or inspections beyond the AD.

• No mention of replacement instruments: The cancellation notice does not identify any subsequent AD, service bulletin adoption by rule, or alternative regulatory requirement intended to supersede the cancelled AD. The background claims the unsafe condition no longer exists because of prior inspections, which is the presented reason for not replacing the AD with another instrument.

• Administrative delegation: The signature by "David Villiers, Delegate of the Civil Aviation Safety Authority" indicates the decision sits within CASA's administrative remit and was exercised by a delegate. The source does not set out the legal basis for that delegation, but it does show the cancellation proceeded through delegated administrative authority.

Because the document is narrow in scope, it does not enumerate cross‑references to other legislative instruments, nor does it indicate any interaction with civil liability, insurance, or certificate validity. The only explicit cross‑document interaction in the text is the operational use of Cessna SEB 85‑20 as the actionable technical standard under the now‑cancelled AD.

The source records a concise lifecycle for the specific AD it cancels, and presents the cancellation as the endpoint of that lifecycle.

• Originating AD: The background identifies the AD as "issued in 1986" and describes its content: it required inspection of pilot and co‑pilot seats per Cessna SEB 85‑20 with compliance "within 25 hours time in service after 2 April 1986." Those dates and requirements constitute the initial amendment or directive that affected the Cessna 185 fleet.

• Cancellation event: The current instrument records the cancellation action, stating "This AD is cancelled on 3 July 2008." The cancellation notice was signed on 22 May 2008 by the CASA delegate, indicating the administrative decision date preceded the stated effective cancellation date.

• Rationale for cancellation: The background text explains the reason for the cancellation: CASA's view that "As all aircraft would have been inspected by now, the unsafe condition no longer exists." That is the stated basis for removing the AD. The document therefore documents a change in regulatory posture from a mandatory directive to no active directive on this particular issue.

• Unstated intermediate steps: The source does not record any interim amendments, revisions, superseding directives, or safety recommendations between the original 1986 AD and the 2008 cancellation. The text identifies only the original AD and the cancellation; it does not provide a chain of amendments or a chronology of enforcement events. The phrase "This unique Australian AD" suggests the AD was a single, distinct item in CASA's AD registry rather than part of a series of amendments, but the source does not elaborate.

• Administrative record: The signature and date at the end of the document serve as the administrative stamp for the cancellation. There is no annexed compliance record, audit, or verification report included in the notice; only the background assertion supports the cancellation decision.

In summary, the instrument documents the initiation of an AD in 1986, a defined compliance window at that time, and the administrative cancellation effective 3 July 2008 justified by an asserted state of fleet compliance.

The source contains no litigation history. It makes no reference to court proceedings, appeals, judicial review, or disputes concerning the original AD or its cancellation. The notice is purely administrative in form: it records the issuance history and cancellation, and provides a background statement of rationale.

Because the document includes only the administrative cancellation and the rationale that inspections would have been carried out by now, there is no textual material in the source indicating whether the AD or its cancellation was contested, appealed, or otherwise subject to adjudication. No case names, decisions, or pending proceedings appear in the text. The signature block records the administrative delegate who made the cancellation decision, but the instrument does not reference any internal review or external judicial process.

Where litigation or dispute might be relevant to understanding the validity or consequences of the cancellation, such information is not contained in the source. The document therefore supplies no evidence of any legal challenge to the AD, no precedent concerning the legal effect of the cancellation, and no record of remedies sought or obtained in relation to the instrument.

The source provides a few discrete items a practitioner or affected operator should note; each is directly supported by the text.

• Cancellation does not include continuing obligations in the text: The notice states simply "Requirement: CANCELLED. This AD is cancelled on 3 July 2008." The document does not say that operators must retain or produce records of prior compliance, nor does it specify any continuing monitoring obligations. Practitioners should therefore note the instrument itself imposes no continuing record‑keeping duty expressly, but it also does not disclaim other regulatory obligations that may still apply outside this AD.

• Reliance on a factual presumption: The stated rationale is that "As all aircraft would have been inspected by now, the unsafe condition no longer exists." That is framed as an assumption or expectation rather than as documentary verification. The word "would" signals an inferred state rather than a guaranteed one. If an individual aircraft was not inspected in accordance with the original AD, the cancellation notice does not address corrective steps; the document is silent about remedial measures where the presumption is false.

• Temporal gap between compliance window and cancellation: The original compliance window was "within 25 hours time in service after 2 April 1986." The cancellation takes effect on 3 July 2008. The source does not explain any assurance mechanism for verifying compliance over that long interval, nor does it specify checks on newly imported or re‑registered Cessna 185 aircraft that might not have been subject to the original 1986 compliance window. The document does not address aircraft that enter the Australian registry after the original compliance period.

• No enforcement statements in the cancellation: The notice contains no statement about retrospective enforcement or penalties for aircraft found not to have been inspected. The cancellation therefore removes the directive, but it does not provide a pathway for enforcement if non‑compliance with the original AD is later discovered.

• Narrow scope: The AD concerned the physical engagement of seat latch pins into the seat rail and locking of the seat "securely in position" as defined by the referenced Cessna SEB 85‑20. The cancellation removes that specific AD obligation; it does not speak to other possible airworthiness risks or separate ADs that might address related seat hardware or occupant safety,no cross‑references to other instruments are supplied.

• Administrative delegation: The document is signed by a CASA delegate. The source does not set out the basis of delegation, internal review or recordkeeping; practitioners relying on the cancellation as evidence of regulatory status should consider retaining independent evidence of prior compliance or confirmations if necessary for contractual, insurance or certification purposes.

These are the concrete points that arise from reading the document; the notice itself does not offer further clarifications or procedural directions.

The cancellation notice changes the compliance landscape by removing the specific AD obligation; the source contains limited operational guidance, so compliance steps must be derived from the text of the document itself.

• For the specific AD: No further action is required to comply with AD/CESSNA 185/42 after its cancellation date. The instrument states "This AD is cancelled on 3 July 2008." Therefore, after that date, the regulatory duty imposed by that AD is no longer in force under the terms of this notice.

• For those who had not performed the original inspection: The cancellation notice is silent on remedial steps. The background presumes "As all aircraft would have been inspected by now," but if an owner or operator cannot substantiate that an inspection was performed in accordance with Cessna SEB 85‑20 within the original timeframe, the instrument does not instruct a corrective course of action. Practitioners in that situation must therefore consider practical steps outside this notice, such as performing an inspection per the referenced Cessna SEB or seeking clarification from CASA, noting that the source document does not contain such directions.

• Record retention and evidence: The cancellation does not state a requirement to retain records of the earlier inspections. If an operator needs to demonstrate historical compliance for contractual, insurance, or internal audit reasons, that requirement is not covered by the text of the cancellation; the document itself neither demands nor relieves such recordkeeping.

• Interaction with manufacturer guidance: The AD originally required action "in accordance with Cessna SEB 85‑20." Even though the AD is cancelled, the manufacturer bulletin remains a technical document outside the text of this notice. The cancellation does not nullify the availability or technical guidance contained in Cessna SEB 85‑20; it only removes the AD’s regulatory compulsion to follow that SEB. If an operator wishes to mitigate residual risk, they may elect to use the SEB as a voluntary technical standard, but the cancellation notice does not mandate that.

• Administrative contact: The signature block identifies the decision as made by "David Villiers, Delegate of the Civil Aviation Safety Authority" dated 22 May 2008. The source does not provide procedural contact details for follow‑up queries. If operators require confirmation or have unresolved questions about an individual aircraft’s compliance history, the cancellation notice itself does not provide a channel; practitioners should consider that the document is a public cancellation notice and does not substitute for direct correspondence with CASA, although the document does not instruct that either.

In short, the cancellation removes the AD’s inspection requirement as of 3 July 2008. The document supplies no remedial or recordkeeping prescriptions; where an aircraft’s compliance history is uncertain, the notice does not specify required next steps, and affected parties will need to look beyond this document for operational or legal guidance.