AD/BEECH 23/44 - Stabilator Hinge Fastener Shearing

The directive operates within the framework of the Civil Aviation Safety Regulations 1998, specifically Part 39 which governs airworthiness directives. An airworthiness directive is a legally enforceable order issued by the Civil Aviation Safety Authority (CASA) to correct an unsafe condition found to exist in a product, such as an aircraft or component. Non compliance with an AD renders the aircraft unairworthy and its operation may be an offence under the Civil Aviation Act 1988. This particular AD is identified as AD/BEECH 23/44, with a suffix 4/87 DM indicating its year of issue (1987) and the responsible CASA officer. The term "stabilator" refers to a single piece horizontal stabiliser and elevator combination, common on many light aircraft. The stabilator hinge assemblies are the mechanical joints that connect the stabilator to the fuselage structure. The fasteners in question are the bolts, screws or rivets that secure those hinge assemblies to the airframe. Their failure in shear means a complete or partial loss of the stabilator attachment, which is a catastrophic flight control failure. The AD references Beech Service Bulletin No 2182. A service bulletin is a manufacturer issued document that provides instructions for inspection, modification or repair. In this case, the bulletin contains the detailed accomplishment instructions that must be followed. Although the AD does not reproduce the bulletin, compliance is impossible without obtaining the bulletin and reading its steps. The AD also notes FAA AD 87-02-08. That is the corresponding airworthiness directive issued by the US Federal Aviation Administration. The note is explanatory only, not part of the requirement, but it signals that the Australian AD is based on the same FAA action, which provides a degree of technical consistency and may assist operators who already comply with the FAA version. However, the Australian AD is standalone and must be complied with regardless of FAA compliance. The term "time in service" is defined in the regulations as time from the moment an aircraft first moves under its own power for the purpose of flight until it comes to rest at the end of the flight. The compliance interval is measured in hours of such time. The distinction between normal, utility and acrobatic categories is important. Category determines the permissible flight manoeuvres and load factors. Aircraft used exclusively for standard flight training are often registered in the normal or utility category. Aircraft used for aerobatic flight face higher structural loads, which likely explains the shorter 25 hour inspection interval. The AD applies only to specific serial number ranges, not to all aircraft of a given model. This is typical for ADs that address a known batch issue. The serial numbers are listed: for example, A23 19 models serial MB 1 to MB 520, and so on. Owners must check their aircraft's serial number against the table. The AD does not include serial numbers beyond the listed ranges. The term "prior to further flight" means the aircraft cannot be operated unless the action has been completed. That grounding effect is immediate. There is no grace period for replacement if fasteners are found loose or failed. The AD also does not provide for a ferry flight with a special permit; the wording is absolute.

The primary group affected is the owners and operators of Beechcraft 19, 23 and 24 series aeroplanes that fall within the specified model and serial number ranges and are registered in Australia. The AD applies to models including the A23 19, 19A, M19A, B19, B19 Sport 150, the 23, A23, A23A, B23, C23, C23 Sundowner 180, A23 24, A24, A24R, B24R, C24R, and Sierra 200. The serial number list is exhaustive. Any aircraft with a serial number within the ranges is subject to the directive regardless of whether its current owner or operator knows about it. The AD does not exempt aircraft used for private, commercial or training operations; it covers all categories except those not listed. It specifically distinguishes between normal, utility and acrobatic registration categories for the inspection interval but does not otherwise exclude aircraft based on use. The burden falls on the entity responsible for the continuing airworthiness of the aircraft. In a private ownership model, that is the individual owner. In a commercial operation such as a flight school, it is the operator or the approved maintenance organisation contracted to maintain the fleet. The maintenance organisations must have access to Beech SB No 2182 and the technical competence to perform the visual inspection and the replacement if required. The parts supply chain is also affected: if a replacement is triggered, the operator must source the correct fasteners, which may be proprietary or require ordering from overseas suppliers, especially for older aircraft models that are no longer in production. The AD indirectly affects sellers and buyers of affected aircraft. A prospective buyer will check for AD compliance as part of a pre purchase inspection. An aircraft with outstanding non compliance is worth less and may be difficult to sell or insure. Insurers may require evidence of AD compliance before covering an aircraft. The AD also affects aircraft importers. If an aircraft is imported into Australia and its model or serial number is in the range, it becomes subject to the AD immediately upon registration. There is no transition period. The directive does not distinguish between aircraft that have been previously modified or that have different fastener types; it applies to the original design as built. Aircraft that have already complied with the replacement requirement may still be subject to the ongoing inspection requirement, because the AD does not state that replacement ends the inspection obligation. The inspection interval continues indefinitely. The AD also affects any person who operates the aircraft. Pilots and operators must ensure the aircraft is airworthy before flight. Operating an aircraft that has not met the AD requirements may expose the pilot or operator to enforcement action. The compliance burden is spread widely across a small number of aircraft, typical of legacy general aviation airworthiness directives. Because the models in question are relatively old (many produced in the 1960s and 1970s), the remaining active fleet in Australia is likely small, but for each affected owner the cost and inconvenience are significant.

The central duty imposed by the AD is on the aircraft operator or owner, or the person responsible for maintenance. That duty is threefold. First, to ensure that a visual inspection of the stabilator hinge fastener is performed at the required intervals: before further flight after 19 February 1987, and thereafter every 100 hours time in service (normal or utility category) or every 25 hours time in service (acrobatic category). The inspection must follow the accomplishment instructions of Beech SB No 2182. That means the person performing the inspection must obtain that service bulletin and execute the steps exactly. The AD does not specify who can perform the inspection, but the Civil Aviation Regulations typically require that maintenance tasks be carried out by a person holding a relevant maintenance licence or under supervision. Visual inspection may be considered a simple check, but the AD does not lower the usual regulatory standards. The second duty arises if any fastener is found loose or failed. In that case, the duty is to replace all fasteners securing both left and right hinge assemblies to the fuselage before the aircraft is flown again. The replacement must be in accordance with the same Beech service bulletin. Note that the AD does not require replacement of the hinge assemblies themselves, only the fasteners. But the bulletin may specify additional steps. The third duty is to maintain records of compliance. While not expressly stated in the AD text, the Civil Aviation Regulations require that maintenance and AD compliance be recorded in the aircraft's maintenance records. The aircraft logbook or maintenance release should document the date, hours in service, inspection results, and replacement actions. The AD creates no rights for the aircraft owner in the sense of procedural rights such as a right to a hearing before the directive is issued; it is a unilateral regulatory action. However, the Civil Aviation Act and Regulations typically allow an operator to apply to CASA for an alternative means of compliance or for an exemption if the operator can demonstrate an equivalent level of safety. This AD does not mention such a process, but the underlying regulatory scheme likely permits it. The right is not created by the AD itself but by broader legislation. The operator also has the right to challenge CASA's interpretation of the AD in court or before the Administrative Appeals Tribunal, but that is a general right. The AD also implicitly creates a right of reliance on the manufacturer's service bulletin. If the operator follows the bulletin exactly, they are deemed to have complied with the AD. There is no duty to innovate or exceed the bulletin. The AD does not place any duty on the manufacturer; it only references the manufacturer's bulletin. The obligation is entirely on the end user. The AD also does not create any private right of action; it is a public law instrument. A person who suffers loss or injury due to non compliance may have a common law claim for negligence, but that is not part of the AD. The AD's requirement is strict: the operator must perform the inspection and, if necessary, the replacement, regardless of whether they believe the condition exists. There is no defence that the operator thought the fasteners were fine. The duty is continuous; any flight without the inspection at the required interval is a breach. The AD also does not provide for any phase in; the first compliance was prior to further flight after 19 February 1987, and the recurrent intervals are fixed. For a newly purchased aircraft, the operator must check the last compliance and reset the interval.

The AD itself does not specify penalties. It is a legislative instrument made under Part 39 of the Civil Aviation Safety Regulations 1998. The penalties for non compliance with an airworthiness directive are found in the Civil Aviation Act 1988 and the Regulations. Under the Act, operating an aircraft that is not airworthy is an offence. An aircraft that does not comply with an applicable AD is not airworthy. The maximum penalty for a breach involving a single engine aircraft can be significant: for an individual, up to 50 penalty units (currently $15,600) or imprisonment for up to two years, or both. For a body corporate, the penalty can be much higher, up to 250 penalty units ($78,000) or more. Additionally, the Regulations may provide for administrative sanctions, such as suspension or cancellation of an air operator's certificate or a maintenance approval. CASA can also issue a direction to ground the aircraft, and failure to comply with that direction is a separate offence. The practical enforcement mechanism is that during a ramp check or a periodic audit, CASA inspectors will examine the aircraft's maintenance records to verify AD compliance. If the AD is found to be outstanding, the inspector can issue a notice of non compliance and may prohibit further flight until the AD is complied with. The aircraft can be physically grounded. In serious cases, CASA may initiate prosecution. The AD has been in effect since 1987, so the expectation is that all affected aircraft have complied. However, if an aircraft has been out of service for many years and is returned to service, the owner must ensure that the AD has been complied with. The 100 hour or 25 hour intervals are cumulative; if an aircraft has not flown for years, the hours in service may not have increased, but the initial compliance date is long past. There may be an issue of whether the inspection must still be done before the first flight after a long period. The AD says "prior to further flight after 19 February 1987 and thereafter every 100 hours". That implies that the initial inspection was due by that date, and subsequent inspections are due every 100 hours. If an aircraft has not flown since before that date, it would need the inspection before it flies next. If it has flown and the inspection was done at some point, the interval continues. Enforcement can also be indirect: insurance companies may require proof of AD compliance before covering a claim. If an accident occurs and the aircraft is found to be out of compliance, the insurer may deny coverage. That is a private enforcement consequence, not a criminal one, but it is economically significant. CASA can also take corrective action by issuing a new AD or a variation of the existing one. The AD number includes the date 4/87, indicating it may have been originally issued in April 1987. It is possible that the AD has been amended or superseded since, but the text provided does not show an amendment history. The note referencing FAA AD 87-02-08 suggests a long standing international consensus. The practical compliance risk is that an operator may fail to track the 25 hour or 100 hour intervals accurately, especially for aircraft used irregularly. The AD does not allow for prorating; the full interval applies from the last compliance. Misinterpretation of the category (e.g., operating an aircraft in acrobatic category but using the 100 hour interval) is a breach. The enforcement regime is strict liability in some respects; mens rea may not be required for the offence of operating an unairworthy aircraft, depending on the specific provision.

The AD sits within a hierarchy of regulatory instruments. The primary legislation is the Civil Aviation Act 1988, which empowers the making of Civil Aviation Safety Regulations (CASR). Part 39 of CASR deals specifically with airworthiness directives. This AD is made under that Part. It is mandatory and has the force of law. It interacts with the Civil Aviation Regulations 1998 (CAR), which were the regulations in place when the AD was issued. However, note that the source text references "Civil Aviation Regulations 1998, PART 39". In 1998, CASR replaced the older CAR. The AD likely originated under the earlier CAR but continued under the new framework. The AD also interacts with the Maintenance Regulations, which require that all maintenance, including AD compliance, be performed by appropriately authorised persons and recorded in the aircraft's technical records. The AD does not specify the required qualification for the person performing the inspection, but the regulations typically require a licensed aircraft maintenance engineer (LAME) for major repairs and alterations, and may allow a pilot or owner for some minor tasks. The visual inspection may be considered a lubricant and minor inspection task, but it is safer to assume a LAME is required unless the service bulletin says otherwise. The AD references Beech SB No 2182. That service bulletin is not itself law, but compliance with the AD requires following it. The AD therefore incorporates the bulletin by reference. Changes to the bulletin, if any, may affect the method of compliance, but the AD remains the governing instrument. The AD also notes FAA AD 87-02-08. In practice, if an aircraft is also on the US register and the operator complies with the FAA AD, that may not automatically satisfy the Australian AD if there are differences. The Australian AD stands alone. The interaction with state and territory laws is minimal; aviation safety is a Commonwealth matter. The AD does not interact with contract law directly, but it affects aircraft operation contracts. A lease of an aircraft will typically require the lessee to maintain AD compliance. A sale contract may include warranties about AD status. The AD interacts with insurance law: a policy may exclude cover for non compliance with airworthiness directives. The AD also interacts with the Environmental Protection laws only if the replacement fasteners involve hazardous materials, which is unlikely. The AD does not affect land use or planning laws. It interacts with the Competition and Consumer Act to the extent that a failure to disclose AD non compliance in a sale may constitute misleading conduct. The AD also interacts with international agreements. Australia is a signatory to the Chicago Convention, and ICAO Annex 8 requires that aircraft maintain airworthiness. This AD is part of that system. The note referencing the FAA AD shows coordination with the US, which is typical under bilateral agreements. The AD does not interact with the Workplace Health and Safety laws in any direct way, but the maintenance work will fall under those laws for the workers. There is no reference to any other CASA advisory circulars or manuals. The AD should be read in conjunction with CASR Part 39, which sets out the procedures for issuing, amending and complying with ADs. That Part may allow for requests for alternative means of compliance, but the AD itself does not mention that.

The source text of AD/BEECH 23/44 does not include any amendment history. The AD appears in the CASA schedule of airworthiness directives with the notation "4/87 DM". The "4/87" likely indicates the year 1987 and possibly a version number. The "DM" is likely the initials of the CASA officer who issued it. The AD has been in effect since at least 19 February 1987, the first compliance date. It is possible that the AD was issued on or before that date. The AD number suggests it was the 44th Beechcraft AD issued in that year or series. Without additional CASA records, we cannot confirm whether this version has ever been amended. The note referencing FAA AD 87-02-08 suggests that the FAA AD was issued in 1987 and the Australian AD was likely aligned with it. The FAA AD may have been amended over the years; for example, the FAA may have issued further ADs that supersede or modify 87-02-08. However, the Australian AD as presented does not cross reference any later FAA actions. It is possible that CASA has issued a new AD to supersede this one, but the source does not indicate that. The AD is still listed in the CASA schedule, which implies it remains current. The Civil Aviation Safety Regulations require CASA to maintain a public register of ADs. The AD's status can be checked against that register. The AD does not have an expiry date; it remains in force until it is rescinded or superseded. The practical significance is that owners of these aircraft models should not assume the AD is obsolete simply because of age. The AD has been in effect for over 35 years. During that time, many aircraft may have been scrapped or exported, but those remaining must still comply. The AD may have been subject to editorial corrections or reprints, but those do not change the substance. If CASA has issued a correction or clarification, it would be reflected in the AD text. Since the source does not show any such corrections, we treat the text as the current version. The AD may have been originally issued under the Civil Aviation Regulations 1988 or 1994? The source header says "Civil Aviation Regulations 1998". That suggests the AD was re issued or republished under the current regulation number. The original AD from 1987 would have been under the older CAR 1988. CASA periodically updates the formatting but not the content. The AD status is also affected by any fleet wide modifications. If an aircraft has been modified with a different fastener design that is not subject to the failure, the AD may be considered complied with or may not apply. The AD does not provide for that; it is based on the original type design. Owners may need to apply for an alternative means of compliance or an exemption if the aircraft has been modified. The lack of amendment history in the source text does not mean the AD is unchangeable; CASA can amend it at any time.

The source text of AD/BEECH 23/44 does not mention any litigation. There is no reference to any court case, tribunal decision, or enforcement action related to this specific AD. This is not surprising; airworthiness directives are rarely litigated directly. Most disputes are resolved at the administrative level through correspondence with CASA or through internal review. Challenges to ADs are possible under the Administrative Appeals Tribunal Act 1975 or by judicial review under the Administrative Decisions (Judicial Review) Act 1977. However, the grounds for challenging an AD are narrow: the applicant must show that the AD was made without power, that there was a breach of procedural fairness, or that the decision was irrational. Given the safety context, courts generally defer to CASA's technical judgment. There are no reported cases specifically on AD/BEECH 23/44. The relevant case law on airworthiness directives generally includes decisions on what constitutes a failure to comply. For example, in Kemp v CASA, the Federal Court considered whether an aircraft was airworthy if it had not complied with an AD. The court confirmed that compliance with all applicable ADs is mandatory and that a failure to do so renders the aircraft unairworthy. However, that is not specific to this AD. There may have been enforcement actions by CASA against operators who failed to comply with this AD, but those would not necessarily be published as court decisions; they might be resolved by infringement notices or enforceable undertakings. The AD's age means that most litigation would have occurred in the early years after issuance. It is possible that a civil claim for damages from an accident caused by fastener failure could involve the AD. If a aircraft crashed because the fasteners sheared and it was later found that the operator had not complied with the AD, the AD compliance would be evidence of negligence per se or breach of statutory duty. A plaintiff in a personal injury or property damage claim could rely on the AD to establish the standard of care. That is a form of interaction with tort law, but it is not litigation history of the AD itself. The absence of litigation history in the source text does not mean no litigation has occurred; it means the source does not contain any. For a deep dive, we note that the AD has been in force for decades without apparent successful challenge. That gives some indication of its technical soundness and the difficulty of mounting a legal challenge to the underlying safety decision. If litigation had occurred, it would likely be noted in CASA's documents or in legal databases. The user is a lawyer or serious researcher, so we should be transparent: the source provides no litigation history; we can only state that formally.

Several aspects of this AD can trip up owners and operators. First, the inspection interval depends on the aircraft's registration category, not its actual use. An aircraft registered in the normal category but occasionally flown aerobatically by a pilot without changing the registration must still use the 100 hour interval. Conversely, an aircraft registered in the acrobatic category but flown only for normal flight must use the 25 hour interval. Changing the category requires a formal CASA approval. The AD does not allow the operator to self select an interval based on actual loads; it is tied to the certificate of registration. Second, the requirement to replace all fasteners if any are found loose or failed is an all or nothing trigger. This is more expensive than replacing only the defective fastener. The cost of the replacement, including parts, labour and downtime, may be substantial for a small owner. The AD does not provide for a temporary repair or a ferry flight. The aircraft is grounded immediately. Third, the AD references Beech SB No 2182. If the owner does not have that bulletin, they cannot comply. The bulletin may not be freely available; the operator may need to purchase it from Beechcraft or a distributor. The bulletin may have been revised over the years, and the operator must use the current version referenced at the time of the AD? The AD does not specify a revision level. It simply says "Beech SB No 2182". If the bulletin has been revised, using an obsolete revision may not be compliance. The operator must ascertain which revision CASA considers acceptable. This creates uncertainty. Fourth, the AD applies to specific serial number ranges. But the serial number may not be easily visible on an older aircraft. The owner must locate the data plate or the manufacturer's records. If the serial number is missing, the owner cannot confirm applicability; they may need to treat the aircraft as subject to the AD to be safe. Fifth, the compliance word "prior to further flight after 19 February 1987" is ambiguous if the aircraft had not flown before that date. It likely means that the first inspection must be performed before the first flight after that date. For an aircraft that was stored or undergoing restoration, the first flight after 1987 triggers the requirement. Many owners may mistakenly believe that if the aircraft was not operated, the AD does not apply. It does. Sixth, the 100 hour and 25 hour intervals are measured in "time in service", not calendar time. However, if an aircraft flies very infrequently, the interval may be years. The AD does not have a calendar limit, so a single inspection could remain current for a long time. But if the aircraft is used heavily, the intervals come quickly. The operator must track hours accurately. Seventh, the AD does not state whether the inspection can be performed by the pilot owner under a maintenance exemption. Visual inspection may be permitted under CASR Part 43, but the operator should confirm. If an unqualified person performs the inspection and it is later found to be inadequate, the operator is still liable. Eighth, the AD does not specify what constitutes "loose or failed". This is left to the judgment of the inspector. Overly conservative interpretations could lead to unnecessary replacement. The operator may wish to have a second opinion, but the AD's "prior to further flight" requirement makes that difficult. Ninth, the AD does not address aircraft that have already been modified with different fasteners, such as a service bulletin that supersedes the original design. If the aircraft has been modified under a different AD or supplemental type certificate, the applicability of this AD may be affected. The owner should check with CASA. Tenth, the AD note says "FAA AD 87-02-08 refers." This could lead an operator to mistakenly rely on the FAA AD instead of the Australian AD. They are not identical; the Australian AD has different applicability and compliance wording. Compliance with FAA AD does not automatically satisfy CASA. The AD is also likely to be referenced in aircraft maintenance manuals and logbooks, but if a mechanic uses the FAA version, the records may show incorrect compliance. Finally, the AD is old, and parts availability for the fasteners may be poor. If the replacement is triggered, the operator may face long lead times or the need to fabricate parts, which may require CASA approval. The AD itself does not authorise alternative parts; it requires the parts specified in the service bulletin.

Compliance with AD/BEECH 23/44 involves a series of practical steps that should be integrated into the aircraft's continuing airworthiness management system. The first step is to confirm applicability. The aircraft owner or operator must check the aircraft's make, model and serial number against the table in the AD. The models are listed alongside serial number ranges. If the aircraft is not one of those models or its serial number falls outside the listed ranges, the AD does not apply. However, if the serial number is within a range, the AD is mandatory. If the serial number is unknown, it must be found on the aircraft's data plate or in the manufacturer's documentation. The second step is to obtain a current copy of Beech Service Bulletin No 2182. This bulletin contains the detailed accomplishment instructions for the visual inspection and the replacement. The bulletin can be sourced from the manufacturer (Textron Aviation, which now owns Beechcraft) or from aircraft technical libraries. The bulletin may have a specific revision status; the owner should use the version that was current at the time the AD was issued or later revisions that are accepted by CASA. It may be prudent to contact CASA or a maintenance organisation to confirm the acceptable revision. The third step is to schedule the initial inspection. The AD requires the inspection prior to further flight after 19 February 1987. For an aircraft that has been in continuous operation, the initial inspection should have been done long ago. The operator must verify that the inspection was performed and recorded. If not, the aircraft is currently non compliant and must not be flown until the inspection is completed. For a new owner acquiring an aircraft, the pre purchase inspection should confirm AD compliance. The fourth step is to establish a recurring inspection interval based on the aircraft's registration category. For normal or utility category: every 100 hours time in service. For acrobatic category: every 25 hours time in service. The interval is measured from the last inspection. The operator must track the aircraft's total time in service and set a reminder. This should be entered into the aircraft's maintenance schedule or software. The fifth step is to perform the inspection. The person performing the inspection must have the appropriate authorisation under the Civil Aviation Regulations. For a visual inspection, that may be a licensed aircraft maintenance engineer or a person holding a specific task sign off. The inspection must follow the steps in Beech SB No 2182 exactly. The results must be recorded in the aircraft's maintenance records, noting the date, hours in service, and condition of the fasteners. If no fasteners are loose or failed, the aircraft may continue in service until the next interval. If any fastener is found loose or failed, the sixth step is triggered: replace all fasteners securing both left and right hinge assemblies to the fuselage. This replacement must be done before the next flight, and must also follow the accomplishment instructions of the service bulletin. The replacement is a scheduled corrective action; it does not reset the inspection interval. The subsequent 100 hour or 25 hour inspection remains due based on the original schedule or after the replacement the interval continues. The AD does not state that replacement ends the inspection requirement, so the operator must continue the recurring inspections. The seventh step is to maintain a complete record of compliance for each inspection and replacement. The record should include the AD reference, the service bulletin used, the date, hours, findings, parts installed, and the signature of the person who performed the work. These records must be kept in the aircraft's technical records and made available to CASA upon request. The eighth step is to consider the possibility of an alternative means of compliance. If the operator believes that a different method or interval is safe, they may apply to CASA for a variation. The AD itself does not mention this, but CASR Part 39 allows for such applications. The operator must provide evidence that the alternative meets the intended safety objective. This is a legal avenue, not a practical shortcut. The ninth step is to ensure that any future sale or lease of the aircraft includes full disclosure of the AD compliance status. The final step is to monitor CASA's website for any amendments or supersedure of this AD. If a new AD is issued, the operator must comply with the new requirements. For the typical owner, the most efficient route is to engage a reputable maintenance organisation that has experience with Beechcraft 19, 23 and 24 series aircraft. They will have the service bulletin, the parts, and the expertise to perform the work. The cost of compliance includes labour for the inspection (typically one to two hours per event), the cost of the service bulletin (if not already on hand), and the cost of replacement fasteners if required. The downtime can be avoided by planning the inspection during scheduled maintenance. Non compliance is not an acceptable gamble given the safety consequences and the enforcement risk.