Airworthiness Directives 2004 - Revocation and Remaking - Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters

The central concept is the airworthiness directive. Under the CASR 1998, an AD is a mandatory regulatory instrument issued by CASA that directs the owner, operator, or maintainer of an aircraft or aeronautical product to carry out a specified action within a compliance time to address an unsafe condition. ADs typically require inspections, modifications, parts replacements, life limitations, or operational restrictions. The instrument at hand does not itself define an AD; it assumes that definition from the parent regulation.

A second concept is revocation and remaking. This is a legislative technique where a statutory instrument or a part of it is repealed and replaced by a new instrument that re enacts the same provisions. It is often done to move existing directives from a consolidated list into individual instruments, to ensure each AD has its own legal identity for referencing, enforcement, and amendment. It may also be done to regularise the legal status of directives that were originally issued in a less formal way or that were incorporated by reference rather than enacted as separate instruments.

The instrument also distinguishes between active ADs, cancelled ADs, and superseded ADs. Cancelled ADs are those that have been withdrawn or have no further force. Superseded ADs are those replaced by a later version; the later version is listed separately (e.g., AD/BELL 206/6 Amdt 7 supersedes AD/BELL 206/35 Amdt 3). The instrument’s schedule includes both active and cancelled entries. This raises a technical question: if a cancelled AD is remade as a separate instrument, does that instrument have any legal effect? Typically a remade directive that was cancelled would itself be a directive stating that it is cancelled, i.e., imposing no obligation. But the instrument does not clarify the content of each remade AD; it only says each is remade in exactly the same form as the latest published edition. If the latest published edition of a cancelled AD simply states that it is cancelled, then the remade instrument is likewise a cancellation notice. The result is a form of regulatory neatness but no operational impact.

Another key concept is the delegate of CASA. The signatory, David Alan Villiers, is a delegate. That means the instrument is made under delegated powers, not personally by the CASA Board or the Director of Aviation Safety. Delegates exercise statutory powers on behalf of CASA. The instrument states the specific subregulation (39.001(1)) under which the power is exercised. The validity of the instrument depends on the delegation being properly made within CASA’s administrative framework.

The instrument also makes explicit that the remade ADs are separate instruments. That distinction matters for legal interpretation: each AD must be read on its own, not as part of a larger set. However, because the content is identical to the previous form, the practical difference is nil. The separation may affect how the ADs are amended in the future: instead of amending a consolidated list, CASA would amend individual instruments. This could reduce the risk of unintended collateral changes to unrelated ADs.

Importantly, the instrument does not incorporate any of the substantive AD text. The reader cannot determine the content of AD/BELL 206/1 (Fuel Booster Pump Wiring - Modification) or any other AD from this document alone. The instrument is merely a procedural device. A person subject to these ADs must refer to the separately published AD instruments to know the required actions, compliance times, and affected serial numbers. This instrument serves only as a record that those separate instruments were validly made at a particular date.

The instrument directly affects any person who owns, operates, maintains, or certifies the airworthiness of a Bell Helicopter Textron Canada 206 series helicopter or an Agusta Bell 206 series helicopter registered in Australia. That category includes private owners, commercial operators (such as charter, aerial work, and training companies), maintenance organisations (including approved maintenance organisations and licensed aircraft maintenance engineers), and CASA itself (as the issuer and enforcer of ADs). The aircraft models covered are those within the type certificate held by Bell Helicopter Textron Canada and its Italian licensee Agusta for the 206 series, which includes the Bell 206 JetRanger, LongRanger, and other variants, as well as the Agusta Bell 206 (AB 206) models built under licence.

Given the breadth of the AD list, the instrument affects virtually every airframe in the Australian Bell 206 fleet. The ADs cover the entire aircraft: main rotor system (blades, hub, yoke, grips, mast, trunnion, pillow block, retention bolts, split cone sets), tail rotor system (blades, hub, yoke, pitch links, control tubes, gearbox, driveshaft, bearings, clamps), transmission (spider, magnetic drain plugs, fan shaft, mount spindle, sun gear), engine (mount, exhaust clamps, fuel lines, chip detectors, firewalls, starter generator), fuel system (booster pump wiring, aluminium lines, tubes, filters, flow switches, heater fuel lines, auxiliary fuel systems), flight controls (cyclic controls, collective controls, tail rotor pedals, bellcranks, balance springs, idler links, levers), hydraulic system (actuators, servo valves, support assemblies, relief valves), electrical system (voltage regulator, battery relay diode, magnetic brakes), structures (tail boom, longerons, skin splices, stabilisers, fins, doors, centre post, landing gear cross tubes, cross tube assemblies), and emergency equipment (flotation bags, inflation valves, solenoid valves, rescue hoist). The AD list also addresses bogus parts: bogus tail rotor hub assemblies, bogus main rotor blades, bogus tension torsion straps, and bogus pressure gauges for emergency floats. That means the instrument indirectly affects parts suppliers, distributors, and brokers who supply components for these helicopters, as ADs often require removal of suspect unapproved parts.

The instrument does not affect operators of other helicopter types, unless they use Bell 206 parts (e.g., same part number applicable to other models). It also does not directly affect foreign operators, because ADs issued by CASA apply only to Australian registered aircraft, unless extended by bilateral agreements or by an operator’s own national aviation authority. However, the revocation and remaking may have indirect effects on the Australian maintenance industry: if the new separate instruments make it easier to locate and reference specific ADs, compliance costs could marginally decrease. Conversely, if the separation creates confusion about which version supersedes which, the compliance burden could increase initially until operators and maintainers adjust.

For aircraft lessors and financiers, the instrument preserves the existing AD landscape, so no new airworthiness liabilities are created. For buyers and sellers of Bell 206 aircraft, the due diligence process remains unchanged: they must still check the list of applicable ADs and ensure compliance. The remaking does not change the status of any AD as mandatory or otherwise.

The instrument itself creates no duties or rights; those arise from the underlying ADs that are remade. However, because the instrument revokes the previous form of the ADs, it simultaneously extinguishes the legal obligation that existed under that previous form. The simultaneous remaking imposes identical duties under the new form. Therefore, the net effect on duties is zero. The technical legal point is that after the instrument takes effect, the duty is owed under the new instrument, not the old one. This can matter for enforcement: if a breach occurred before the revocation and remaking, the prosecutor would need to prove the duty existed under the old AD. Because the content is the same, this should not create a gap, but it introduces a technical issue about the continuity of obligations for continuing breaches (e.g., a non compliant part still installed). CASA would likely argue that the duty to remove or replace that part continues under the new AD. But a defendant could argue that the old AD no longer exists and the new AD only applies from the remaking date. The instrument does not contain a transitional provision addressing such continuity; it simply revokes and remakes simultaneously. In practice, because the content is identical and the remaking is stated to be exactly the same form, a court would likely find that the duty is continuous. But the drafting choice not to include a savings clause is notable.

The primary duty for the aircraft owner or operator is to ensure compliance with each AD that applies to the helicopter. That includes performing inspections within the prescribed intervals (e.g., every 100 flight hours, every 12 months, before further flight), carrying out modifications or replacements, maintaining records of compliance, and making those records available to CASA on request. The ADs may also impose duties on maintenance organisations to use approved data and to certify compliance.

Rights of the aircraft owner include the right to apply to CASA for an alternative means of compliance (AMOC) if the AD imposes a requirement that is impractical or if a different approach can achieve an equivalent level of safety. That right is not created by this instrument but exists under CASR 1998. The instrument does not affect that right. Owners also have the right to seek review of a CASA decision under the Administrative Appeals Tribunal Act 1975, but again that exists independently.

The instrument also preserves CASA’s right to take enforcement action for noncompliance with the remade ADs. That right was present under the old ADs and continues unchanged.

The instrument does not prescribe penalties. However, the parent regulation, CASR 1998, likely does. Under subregulation 39.001, an AD is a legislative instrument and noncompliance can be an offence. The typical penalty for contravening an AD under civil aviation legislation can include infringement notices (on the spot fines) of several hundred penalty units for an individual and higher for a body corporate, or prosecution leading to fines of up to thousands of penalty units or imprisonment in serious cases. The exact penalties would depend on the specific provisions of the Civil Aviation Act 1988 and the regulations in force at the time of the instrument (2004). Since then, penalties have increased significantly; current maximum penalties for operating an aircraft not in compliance with an AD can be very substantial.

Enforcement action can be taken by CASA or the Australian Federal Police. Because the instrument merely revokes and remakes ADs without changing content, the enforcement posture is unchanged. However, there is a subtle risk: if the revocation occurred first (even momentarily) and the remaking a second later, a helicopter operator who flew during that gap could argue there was no AD in force. The instrument states it both revokes and makes the ADs as separate instruments; the order of operation may be simultaneous. But if a court interprets the revocation as taking effect before the making, a brief window of no AD could exist. The instrument does not specify a staggered commencement. The delegate signed it on 20 December 2004, but commencement is not indicated; it likely commenced on the day of registration or as specified. The absence of a transitional provision is a drafting weakness. In practice, operators were probably advised to treat the ADs as continuing, but a cautious lawyer would note this potential loophole.

CASA’s enforcement policy typically focuses on education and voluntary compliance first, but can escalate to suspension or cancellation of an airworthiness certificate, or to prosecution. Because the instrument preserves the same ADs, any ongoing noncompliance that existed before the remaking continues as a breach of the new AD. That means an operator who had not complied with AD/BELL 206/6 (Retirement Life - Fatigue Critical Components) before the remaking is still noncompliant after the remaking. The instrument does not provide amnesty for past noncompliance. However, because it revokes the old AD, a prosecution for breach of the old AD after the revocation would be legally complex; CASA would need to rely on the new AD if the breach continued after its commencement.

The presence of many cancelled ADs in the schedule is also interesting from an enforcement perspective. If a cancelled AD is remade as a separate instrument that itself says “cancelled,” then there is no duty under that AD. But if the remaking inadvertently re instates a cancelled AD by not including the cancellation in the text, it could create a new obligation. The instrument says each AD is remade in exactly the same form as the latest published edition. For cancelled ADs, the latest published edition likely states that the AD is cancelled. Therefore, the remade instrument should reflect that. But if the latest edition erred or if CASA’s records were ambiguous, an operator could be confused. The instrument does not attempt to clarify these statuses; it simply lists them.

The instrument interacts with several layers of Australian aviation law. The primary framework is the Civil Aviation Act 1988, which empowers CASA to issue regulations, including CASR 1998. Subregulation 39.001(1) is the specific head of power. The instrument is a legislative instrument and would need to be registered under the Legislative Instruments Act 2003 (now the Legislation Act 2003) to be enforceable. The instrument itself does not mention registration, but presumably it was registered.

The remade ADs also interact with Part 39 of the CASR 1998, which governs airworthiness directives. That Part sets out the criteria for issuing ADs, the process for seeking alternative means of compliance, and the record-keeping requirements. The instrument does not change Part 39.

The ADs are also relevant to provisions of the Civil Aviation Safety Regulations dealing with maintenance (Parts 42, 145, 66, 147 modern equivalents, though in 2004 the structure was different). For example, an approved maintenance organisation must have access to applicable ADs when performing maintenance. The ADs impose mandatory inspections and modifications that must be included in the aircraft’s maintenance program.

The instrument may also interact with the Foreign Airworthiness Directive policy. Under section 39.002 of CASR 1998, CASA can adopt foreign ADs issued by the state of design (in this case, Transport Canada for Bell 206 helicopters). Many of the ADs listed may be based on Canadian or US ADs. The instrument does not reference the equivalent foreign AD numbers, but the content likely mirrors them. Australian operators must comply with whichever is more restrictive if there is difference.

State and territory laws regarding workplace health and safety may also apply to the maintenance actions required by the ADs (e.g., if a modification involves hazardous materials). However, the instrument itself does not preempt those laws; it only imposes aeronautical safety requirements.

Contractual interactions: An aircraft lease agreement often requires the lessee to maintain the aircraft in compliance with all applicable ADs. The revocation and remaking does not change that contractual duty, but the lessee must ensure it is complying with the remade ADs, not the old ones. A careful lessee will update its compliance records to reference the new AD number (which appears to be the same as the old AD number, but the instrument identity may change). The schedule lists AD numbers such as AD/BELL 206/1 through AD/BELL 206/154, which likely remain the same after remaking, so the numbering is unchanged.

Insurance policies may require compliance with all ADs as a condition of coverage. Again, the remaking does not alter the substance, so coverage is unaffected.

The instrument itself is not an amending instrument; it is an original instrument revoking and remaking. It does not describe its own amendment history. However, the schedule reveals that many of the ADs listed have been amended multiple times over the years before this revocation and remaking. For example, AD/BELL 206/6 is listed as “Amdt 35”, indicating 35 amendments. AD/BELL 206/90 is “Amdt 6”, AD/BELL 206/73 is “Amdt 7”, AD/BELL 206/72 is “Amdt 6″ but also cancelled. These amendment numbers show that the ADs have a long history, dating back possibly decades. The instrument preserves the latest amendment state when it says exactly the same form as the latest published edition.

The revocation and remaking itself can be seen as an amendment to the regulatory structure: it changes the legal packaging of the ADs from a single list into separate instruments. That is an administrative amendment. But the instrument does not amend any AD content.

After this instrument, future amendments to each AD would be made by further separate instruments amending the specific AD instrument rather than the consolidated list. That could simplify the amendment process in the long run. However, the instrument does not provide any transitional or savings provisions for previous amendments. This creates a risk that if a prior amendment was not correctly reflected in the latest published edition, that amendment could be lost. The instrument presumes the latest published edition is authoritative, but if CASA’s records were incomplete, the remaking could inadvertently drop an amendment that had been made but not published in the latest edition. The instrument does not have a catch all preserving all previous amendments. Such a risk is small but real in a large fleet with many amendments.

The instrument itself has no recorded litigation history within its text. No cases are cited. However, the underlying ADs may have been litigated in the past, particularly those involving bogus parts (AD/BELL 206/116 - Bogus Tail Rotor Hub Assembly, AD/BELL 206/117 - Bogus Main Rotor Blades, AD/BELL 206/118 - Bogus Tension Torsion Straps). Bogus parts cases often involve criminal prosecution for fraud or for endangering the safety of an aircraft. The ADs themselves are not typically the subject of litigation; rather, they are used as evidence in enforcement proceedings against operators or maintainers.

The revocation and remaking could be challenged on procedural grounds if a person affected by the ADs argued that CASA did not have the power to revoke and remake in one instrument, or that the power under subregulation 39.001(1) only allows issuing ADs, not revoking them in a consolidated instrument. However, subregulation 39.001(1) likely confers the power to issue, vary, or revoke airworthiness directives; many enabling provisions include incidental power. The instrument’s validity would depend on the precise wording of CASR 1998 as at December 2004. No litigation is known, but a potential challenge could have been based on lack of consultation (ADs are usually issued without public consultation due to safety urgency), but that would apply to the original ADs, not the remaking.

The presence of cancelled ADs on the list might lead to confusion and could spawn litigation if an operator is incorrectly cited for noncompliance with a cancelled AD that was remade without a clear cancellation statement. An operator might seek judicial review of the instrument to clarify that the remade cancelled AD imposes no duty. Given that the instrument states the ADs are remade in exactly the same form, a court would likely find that a cancelled AD has no operative effect. But the administrative cost of such clarification is real.

Several aspects of this instrument warrant caution for those relying on it.

First, the instrument does not include the text of any AD. It relies entirely on the “latest published edition” of each AD. If CASA’s published edition was lost, ambiguous, or incorrectly compiled before this instrument, the remade AD could enshrine that error. There is no mechanism in the instrument to correct any error found later. The operator’s only recourse is to apply for an alternative means of compliance or to request a formal amendment to the new AD instrument.

Second, the instrument does not contain a commencement clause. It is signed 20 December 2004, but it does not say when the revocation and remaking take effect. Under the Legislation Act 2003 (as it then was), a legislative instrument may commence on the day of registration or a later date specified. Without a specified date, it commences on the day after registration. An operator relying on the instrument to know the precise moment the old ADs were revoked could face uncertainty if a flight spanned the commencement time.

Third, the inclusion of cancelled and superseded ADs in the schedule could mislead someone who does not read the status annotations. A quick glance might suggest that AD/BELL 206/33 Amdt 2 is still active. The schedule shows “CANCELLED” next to it, but the remaking instrument says it is remade. An unwary operator might think that because it is remade, it must be in force. In fact, a cancelled AD is remade only as a record of cancellation. The instrument should have been clearer by excluding cancelled ADs from the remake altogether, or by stating explicitly that cancelled ADs are remade as records only.

Fourth, the instrument revokes the ADs mentioned in Schedule 1. Does that include the cancelled ones? The wording is “revoke the Airworthiness Directives mentioned in Schedule 1; and (b) make, as separate instruments, each Airworthiness Directive mentioned in Schedule 1”. This suggests that even cancelled ADs are revoked and then remade. If a cancelled AD was previously revoked (that is how it became cancelled), revoking it again may have no effect. But the simultaneous making could create a new legal instrument that is identical to the cancelled version. The result is a new instrument that says the AD is cancelled, which is arguably unnecessary. However, it may inadvertently reinstate a cancelled AD if the latest published edition incorrectly omitted the cancellation language. This is a risk stemming from reliance on “latest published edition” without independent verification.

Fifth, the instrument does not address the effect on aircraft that are currently noncompliant with an AD that was in force before the instrument but that is superseded by another AD in the schedule. For example, AD/BELL 206/35 is superseded by AD/BELL 206/6 Amdt 7 and cancelled. The remaking preserves cancellation. An aircraft that was compliant with AD/BELL 206/35 before its cancellation would now need to comply with the superseding AD (AD/BELL 206/6 Amdt 7). The instrument does not alert operators to these supersession relationships; they must trace the AD chain themselves.

Sixth, the instrument is signed by a delegate, not by CASA’s head. If the delegate’s power of delegation did not extend to revoking ADs (as opposed to issuing them), the instrument could be ultra vires. The instrument states the power is under subregulation 39.001(1), which uses “issue”. The term revoke is not explicitly mentioned. However, many such regulations implicitly include revocation as part of the power to issue. A court would likely read the power broadly, but it is a point of vulnerability. Any challenge would require examination of the specific wording of CASR 1998 as at 2004.

Finally, for those maintaining compliance records, the instrument creates a need to update references. If an operator’s compliance documents refer to “AD/BELL 206/1 as published in the Airworthiness Directive Register 2004”, they now must refer to the separate instrument AD/BELL 206/1. The content is identical, but the legal citation has changed. This could matter in a dispute over record accuracy.

Compliance with this instrument itself requires no action beyond understanding that the ADs remain in force. The instrument does not impose any separate duties. However, to comply with the remade ADs, an operator must:

1. Identify all ADs applicable to the specific helicopter by serial number and model variant. The instrument does not list applicability per AD; that is in each AD’s text. The operator must obtain the full text of each remade AD that applies.

2. Ensure that for each applicable AD, the required action has been accomplished within the specified compliance time, and that repeat inspections (if any) are tracked in the aircraft's maintenance program.

3. Verify that any life limited components have their retirement times recorded in the component history card or equivalent, and that they are replaced before reaching the limit.

4. For ADs that require modifications, ensure the modification is carried out in accordance with approved data (often the instructions in the AD itself, or a service bulletin referenced). After modification, the aircraft logbook entry must cite the AD number and the date of accomplishment.

5. For ADs that require inspections, maintain a schedule (e.g., by flight hours, calendar time, or cycles) and record each inspection result. If a defect is found, the AD may specify repair or replacement intervals.

6. Keep copies of all applicable ADs in the aircraft's technical records or at the operator's base. This is a requirement of CASR 1998 Part 39 or similar. The remade AD instruments are the authoritative source.

7. If an alternative means of compliance is needed (e.g., use of later approved parts that eliminate the need for a one time inspection), apply to CASA for an AMOC. The instrument does not affect that process. The AD may itself list approved alternative means.

8. When purchasing a Bell 206 from overseas or from a new owner, conduct a full AD audit using the list in this instrument as a starting point, but cross reference against the actual AD text for applicable serial numbers and compliance times. The instrument’s schedule provides a list but not the detail.

9. Monitor amendments to the remade ADs after 2004. CASA may issue further amendments to these separate instruments. The 2004 instrument does not freeze the ADs; it just serves as a baseline.

10. For cancelled ADs, ensure that no compliance action is taken unless the cancellation is confirmed. For superseded ADs, ensure compliance with the superseding AD. The instrument does not provide an effective date for supersession; that must be determined from the superseding AD’s own effective date.

The instrument does not provide a compliance checklist or compliance matrix. Operators and maintainers will need to compile their own cross referenced list of ADs, part numbers, and compliance actions. The large number of ADs (over 150) means this is a significant administrative task for any person in charge of a Bell 206 fleet. While the instrument reduces the paper burden by separating each AD into its own instrument (making it easier to find and read), it increases the number of individual instruments that must be stored and tracked. Compliance software that can handle separate instruments is recommended.

From a cost perspective, the instrument imposes no new costs, but the preexisting compliance costs remain. For example, AD/BELL 206/6 (Retirement Life - Fatigue Critical Components, Amdt 35) likely requires tracking of many components with different retirement lives, each of which may require replacement at substantial part and labour cost. AD/BELL 206/73 (Main Rotor Hub Pillow Block, Amdt 7) may require periodic inspection and replacement of expensive components. The instrument does nothing to mitigate those costs; it merely affirm that they continue to be mandatory. Therefore, the best compliance strategy is to treat the remade ADs as unchanged, incorporate them into the existing maintenance system, and ensure that any records referencing older AD editions are updated to reflect that the current legal obligation is owed to the new instrument, even if the text is identical.