AD/BEECH 200/73 - Main Landing Gear Actuator Nut

The AD involves several key concepts that define its scope and effect. An airworthiness directive is a legally enforceable notice issued by CASA that requires a modification, inspection, or other action on an aircraft type to correct an unsafe condition. Non-compliance is an offence under the Civil Aviation Act. The AD applies to a defined population of aircraft: Beechcraft 200, B200, 200T, B200T, 200C, B200C, 200CT, B200CT, and A200CT (FWC-12D) models, subject to specific serial number ranges and exclusions. The exclusion is for aircraft that already incorporate Beech Kit No. 101-8018, which presumably is a modification that addresses the nut issue. The AD targets only the right MLG actuator nut assembly, not the left. The two prohibited part numbers are GMD115-810029-17 and GMD115-810029-23. The replacement part is GMD115-810029-23B or an approved equivalent. “Approved equivalent” is not defined in the AD itself but would normally mean a part that CASA or the manufacturer has determined meets the same specifications. The compliance timeline uses “time-in-service” (TIS), which means the total time the aircraft has been in flight. The 30-calendar-day component covers periods when the aircraft is not flying. The AD allows the operator to choose between two compliance pathways for the initial action: a records check or a physical inspection. Doing either counts as satisfying requirement 1 or 2. However, the substantive obligation is that the aircraft must not be flown with a suspect nut installed after the compliance deadline. The AD also references an FAA AD, indicating harmonisation between the US and Australian regulators on this issue. The concept of “before further flight” is absolute: once the suspect part is found, the aircraft is grounded until it is replaced. The service bulletin from General Machine Diecron is the prescribed method of inspecting for the part numbers; the AD does not permit alternative inspection methods unless separately approved. The AD is final and not subject to appeal within its terms, though an operator could seek an exemption from CASA under section 20 of the Civil Aviation Act, which involves a separate process.

The AD directly affects a defined set of aircraft owners, operators, and maintenance organisations. The owners of the listed Beechcraft 200 series models (including the 200, B200, 200T, B200T, 200C, B200C, 200CT, B200CT, and A200CT) with serial numbers within the specified ranges are the primary duty holders. The aircraft must be on the Australian register or temporarily imported for the AD to have effect, but CASA has authority over Australian-registered aircraft wherever they are. The exclusion for aircraft that already incorporate Beech Kit No. 101-8018 narrows the real-world impact to those aircraft that have not had that kit installed. Operators of aircraft that have been modified with that kit bear no compliance cost. Charter operators, flying schools, and private owners who use these aircraft for business or personal transport are affected. The AD also imposes obligations on maintenance organisations and licensed aircraft maintenance engineers. They must perform the records check, inspection, and replacement as directed. If they fail to do so, they may face enforcement action. Parts suppliers and distributors are indirectly affected because they cannot sell or supply the prohibited part numbers for use on the right MLG actuator, and they may face reduced demand for those parts. Insurers may require proof of compliance before covering aircraft, and lessors may make compliance a condition of lease agreements. The economic burden falls most heavily on operators with multiple aircraft in the affected serial number range. For a small operator with one aircraft, the direct cost includes labour for checking records (30 minutes to an hour), possible inspection labour (two to three hours under the service bulletin), and the cost of the replacement nut assembly (likely several hundred dollars from the manufacturer plus shipping). For a fleet operator, these costs multiply. The AD also creates a secondary market effect: aircraft with the Beech Kit 101-8018 installed may become slightly more attractive in the resale market because they are excluded from the AD, while aircraft without the kit may suffer a modest price discount until compliance is verified. The enforcement risk is concentrated on maintenance organisations that perform the work, because they are in the best position to detect non-compliance and may face liability if they sign off an aircraft that is not compliant.

The AD creates four distinct duties. First, the duty to check maintenance records for evidence that either of the two suspect nut assemblies (P/N GMD115-810029-17 or P/N GMD115-810029-23) has been replaced on the right MLG actuator. This duty must be performed by the compliance deadline of 50 hours TIS or 30 calendar days after 31 August 2006. If the records show that the replacement has already occurred using the approved replacement part (P/N GMD115-810029-23B or an approved equivalent), and that the replacement was properly recorded, no further action is required under the AD. Second, if there is no such record, the duty to inspect the aircraft in accordance with the specified service bulletin to determine whether either suspect part is currently installed. The operator has the right to skip the records check and go directly to inspection; this is an explicit election under the AD. Third, if either suspect part is found during either the records check or the inspection, the duty to replace it with the approved part before the next flight. This duty is immediate and overrides the 50-hour/30-day compliance period. Fourth, the duty not to install either suspect part on any right MLG actuator from the effective date of the AD onward. This is a continuing prohibition with no expiry. The operator also has the right to use an “approved equivalent” part instead of P/N GMD115-810029-23B. The AD does not specify what constitutes an approved equivalent, but it would need to be a part that CASA or the design approval holder (likely Textron Aviation, the successor to Raytheon) has determined meets the same design standard and is eligible for installation. The operator may also apply to CASA for an alternative means of compliance or an exemption under CASR Part 39. The AD does not create a right to seek an extension of the compliance deadline; any extension would require a formal exemption. The operator’s right to fly the aircraft is contingent on compliance. Once the suspect part is found and replaced, the operator has a right to continue operating normally. The AD also implies a right to rely on maintenance logs for the records check: if the logs clearly show the replacement was performed, the operator is entitled to accept that without physical inspection.

The AD is a legislative instrument made under the Civil Aviation Act 1988. Failure to comply with an airworthiness directive is an offence under regulation 39.015 of the Civil Aviation Safety Regulations 1998 (CASR). The maximum penalty for an individual is 50 penalty units (currently one penalty unit is AUD 313, so AUD 15,650) and for a body corporate is 250 penalty units (AUD 78,250). However, CASR also contains provisions that can lead to higher penalties under the Crimes Act 1914 for intentional non-compliance or reckless conduct. CASA may also take administrative enforcement action. The most consequential enforcement tool is the suspension or cancellation of an aircraft’s certificate of airworthiness. If CASA determines that an aircraft is not airworthy because of a known non-compliance with an AD, it can ground the aircraft, which prevents it from being flown. CASA can also suspend or cancel the authorisations of maintenance organisations or individual engineers who certify aircraft as airworthy when they know or should know that the AD has not been complied with. CASA can issue infringement notices (on-the-spot fines) of up to 12 penalty units. The AD does not impose any civil liability directly, but a failure to comply could be used as evidence of negligence in a civil claim for damages if the MLG fails and causes injury or property damage. The FAA AD referenced in the background (2006-12-25) is enforced by the FAA in the United States and may also affect Australian operators if the aircraft is registered in the US or operated under a bilateral agreement. In practice, CASA’s enforcement tends to focus on operators who repeatedly fail to comply or who operate commercially. The compliance time (50 hours or 30 days) is short, and aircraft in active service are likely to be caught quickly. An operator that fails to comply and continues to fly is committing an ongoing offence, and each flight could be treated as a separate offence. The AD’s requirement that replacement be performed “before further flight” gives CASA a strong basis to ground the aircraft immediately if the suspect part is found. The enforcement burden is partly on the maintenance organisation, which should not sign off the aircraft as airworthy if the AD is not complied with. The practical risk for the operator is that an annual or periodic airworthiness review will uncover the non-compliance, triggering enforcement and possible grounding.

This AD sits within a hierarchy of aviation safety regulation in Australia. The Civil Aviation Act 1988 gives CASA the power to issue airworthiness directives. The Civil Aviation Safety Regulations 1998, Part 39, sets out the legal framework for ADs. Regulation 39.015 makes it an offence to operate an aircraft in contravention of an AD. The AD is therefore a mandatory requirement, not merely a recommendation. The AD also interacts with the continuing airworthiness management system under CASR Part 42 and Part M (for Australian aircraft). Operators must include AD compliance in their maintenance program and ensure that records are kept for inspection by CASA or authorised maintenance organisations. The AD’s requirement to check maintenance records aligns with the general obligation under regulation 42.325 to maintain proper records of all maintenance. The AD also interacts with the Airworthiness Directive system of the state of design. The AD explicitly references FAA AD 2006-12-25. This is common for aircraft designed or certified in the United States. CASA may adopt FAA ADs directly or issue its own version with minor variations. In this case, CASA issued its own AD, which is likely to be substantively identical to the FAA version. The interactions with international law: an Australian-registered aircraft operating overseas must comply with this AD regardless of where it is at the time. If the aircraft is also required to comply with the law of the country it is visiting, the AD must be met. Conversely, a foreign-registered aircraft operating in Australian airspace must comply with the applicable ADs of its state of registry; this Australian AD does not directly apply to it unless the foreign state has adopted a similar requirement. The AD also interacts with contract law. An operator who leases an aircraft may be contractually obliged to ensure compliance with all applicable ADs. A failure to do so could be a breach of the lease agreement, leading to termination or liability. Insurance policies typically exclude coverage for losses caused by non-compliance with airworthiness directives. The AD therefore affects the legal relationship between the insured and the insurer. There is no interaction with Australian consumer law because aircraft components are not consumer goods in the ordinary sense. However, if the replacement nut is defective, the manufacturer could be liable under tort or contract law.

The AD is designated AD/BEECH 200/73 with an amendment number of 9/2006. It is effective from 31 August 2006. The source document does not disclose any prior amendments to this specific AD. It appears to be a standalone directive that addresses a newly identified unsafe condition. A note at the bottom of the AD states: “FAA AD2006-12-25 Amdt 39-14651 dated 9 June 2006 refers.” The FAA AD is an earlier instrument (9 June 2006) that likely formed the basis for the Australian AD. CASA may have issued this AD in response to the same failure reports and the FAA action. The AD does not supersede any earlier Beechcraft AD number, but it may be part of a series; the number AD/BEECH 200/73 suggests it is the 73rd AD issued for the Beechcraft 200 series. The amendment history beyond this instrument is not captured in the source. Typically, ADs can be amended to extend compliance times, change the applicability, or incorporate updated service information. There is no evidence that this AD has been amended after 2006. If it has, we would need to consult the CASA AD database. Because the source is a single PDF dated 2006, we can only report what it contains. The practical significance is that the AD remains in force unless formally superseded or withdrawn. CASA may have issued subsequent ADs that address the same or related components, such as AD/BEECH 200/85 or later numbers. The amendment history of the FAA AD (2006-12-25) may include amendments to the service bulletin or compliance time, but the Australian AD does not reference them. The operator should check the current CASA AD listing to confirm the status. The AD’s structure (with separate requirements and compliance times) indicates it was drafted with care to avoid ambiguity. The requirement numbering (1 to 4) is logical, and the compliance times are clear. The document is signed by James Coyne, a delegate of CASA. This is consistent with the usual procedure for issuing ADs.

The source document does not mention any litigation. There is no record within the AD itself of any legal challenge to the directive or its provisions. In general, airworthiness directives are rarely litigated in Australia. The reasons are pragmatic. The cost of challenging an AD is high relative to the cost of compliance for most operators. The time to obtain a court order is long, and the AD usually requires compliance quickly (50 hours or 30 days in this case). CASA has broad powers under the Civil Aviation Act, and courts tend to defer to the regulator’s safety assessment unless there is clear error or bad faith. The AD also follows an FAA action, which adds credibility and reduces the chance of a successful challenge. There is no indication that any operator sought judicial review of this AD. The administrative law avenue would be to apply to the Administrative Appeals Tribunal for review of CASA’s decision to issue the AD, but such applications are rare for ADs because they must be lodged quickly and the AD makes mandatory directions that are not usually subject to merits review. The more likely legal disputes are civil claims arising from a failure of the actuator nut. If the nut fails and causes an accident, an operator or manufacturer might be sued for negligence. The existence of this AD could be used as evidence that the operator knew or should have known of the risk and failed to act. Conversely, if the operator complied with the AD and the nut still failed, the manufacturer might face a product liability claim. The AD itself could be cited in such proceedings to establish the standard of care. There is no reported case in Australia that directly interprets this AD or imposes liability. In the United States, there may be litigation involving the FAA AD, but that would not bind Australian courts. The AD’s background statement says it results from “several reports of failures,” suggesting that the unsafe condition has been observed but not necessarily litigated. The AD is therefore a preventive measure, not a response to litigation.

Several aspects of this AD can catch out an unwary operator or maintenance organisation. The AD applies only to the right MLG actuator, not the left. An operator who checks only the left side would be non-compliant. The AD specifically excludes aircraft that incorporate Beech Kit No. 101-8018. If an operator believes they have that kit installed but cannot find a record, they cannot rely on the exclusion; they would need to verify the installation through records or inspection. The AD allows the operator to choose to do the inspection without doing the records check. This might seem like a shortcut, but it carries risk: if the inspection reveals the suspect part, the aircraft must be grounded and the part replaced before further flight. If the operator had done the records check first and found a record of replacement, they could have saved the cost and downtime of the inspection. The service bulletin (General Machine Diecron Inc. Service Bulletin GM-D32-30-01/102505) is incorporated by reference. That bulletin may contain its own procedures, parts requirements, and warnings. The operator must obtain and follow that bulletin exactly; failure to follow it could result in improper inspection or replacement. The “approved equivalent” part number is not defined in the AD. An operator who installs a part they believe is equivalent but that is not formally approved risks non-compliance. The operator should seek written confirmation from CASA or the manufacturer before reliance. The compliance time is 50 hours TIS or 30 calendar days, whichever occurs first. For an aircraft that is not flown frequently, the 30-day clock starts from 31 August 2006. An aircraft that sits in a hangar for 30 days without flying would still need compliance. An owner who flies only 10 hours in that period cannot wait until the 50-hour limit if the 30 days pass first. The prohibition in requirement 4 applies from the effective date. Even if the operator has a stock of the suspect part numbers sitting on a shelf, they cannot install them. They could sell them to someone who owns an aircraft not subject to this AD (e.g., if the aircraft has the Beech kit installed, the part is not prohibited for use on that aircraft because the AD does not apply to those aircraft), but the installer must be certain that the AD does not apply to that specific aircraft. The AD does not specify who must perform the work. An owner could attempt to check records and perform the inspection themselves if they are not an LAME, but they would need to have the proper authorisation under CASR to certify the aircraft as airworthy after the work. The practical reality is that only a licensed aircraft maintenance engineer should do the inspection and replacement, adding labour cost. If the aircraft is operated commercially, the AD may create a gap in the maintenance schedule that requires the aircraft to be pulled from service, causing revenue loss.

Compliance involves a straightforward but time-sensitive procedure. Start by obtaining the current version of the AD (AD/BEECH 200/73, 9/2006) and the referenced service bulletin (General Machine Diecron Inc. Service Bulletin GM-D32-30-01/102505 dated 21 November 2005). Verify that the aircraft is within the applicability: check the model and serial number against the table in the AD. If the aircraft incorporates Beech Kit No. 101-8018, the AD does not apply. This should be confirmed from the maintenance records. If the aircraft is not affected, no further action is needed, though you should record that the AD was checked and found not applicable. If the aircraft is affected, proceed to requirement 1: check the maintenance records for evidence that the right MLG actuator nut assembly has been replaced with P/N GMD115-810029-23B or an approved equivalent. If there is a clear record of such replacement, certified by an authorised person, and you are satisfied that the work was done correctly, no further action is needed. Keep that record accessible. If there is no such record, proceed to requirement 2: perform a physical inspection of the right MLG actuator in accordance with the service bulletin to determine whether either P/N GMD115-810029-17 or P/N GMD115-810029-23 is installed. Alternatively, you may skip the records check and go straight to inspection. If the inspection identifies either suspect part, replace it with P/N GMD115-810029-23B or an approved equivalent before the aircraft is flown again. Ensure the replacement is done in accordance with the service bulletin. After replacement, update the maintenance records to confirm compliance. Also comply with requirement 4: do not install any of the suspect part numbers on the right MLG actuator of any affected aircraft from 31 August 2006 onwards. This is a permanent prohibition. All actions must be completed within 50 hours time-in-service or 30 calendar days after 31 August 2006, whichever occurs first. For aircraft that have not been flown, the 30-day limit applies. For aircraft that are already compliant (i.e., the part has been replaced), the compliance time does not start; the AD only applies if compliance has not been done. However, the prohibition continues to apply to any future installations. After compliance, log the entry in the aircraft maintenance record system, referencing the AD number and the specific actions taken. Keep a copy of the service bulletin and the AD with the records. If an alternative means of compliance is desired, apply to CASA in writing before the compliance deadline, providing justification. The operator should also inform any pilot or maintenance organisation that may be involved in the aircraft’s operation that the AD has been satisfied.