AD/SD3-60/68 Amdt 2 - Elevator Trim Tab Balance Weight Brackets

The AD rests on a small set of tightly specified concepts drawn from the source text.

• Applicability: The AD applies to "Model SD3‑60 aircraft, all serial numbers" (Applicability). That is an inclusive scope within the SD3‑60 type certificate rather than a list of individual serials.

• Mandatory compliance by reference: The AD does not list the technical work in full. It makes compliance mandatory by instructing operators to "action in accordance with the requirements of EASA Emergency AD 2007‑0107‑E" and to refer to Shorts Service Bulletins SD360‑55‑20 Revision 2 and SD360‑55‑A21 Revision 1, or later EASA‑approved revisions (Requirement; Note). The directive therefore functions as a legal instrument that incorporates another regulator's AD and specified manufacturer service bulletins as the operative requirements.

• Safety finding: The technical justification is a manufacturing non‑conformity. The manufacturer examined cracked brackets and determined they were not conforming to approved design standards, with the result that fatigue life may be "greatly reduced", creating a risk of premature crack initiation and failure (Background). The AD treats that finding as sufficient safety risk to require corrective measures.

• Consolidation of prior actions: The Amendment history explains that earlier ADs were cancelled and that subsequent amendments were prompted by other authorities (UK CAA) and by EASA. Amendment 2 responds to an EASA AD and "combines the necessary corrective actions into a single AD that assures the correct standard of elevator trim tab mass balance weight brackets are installed" (Background). The AD therefore consolidates prior corrective paths into one instrument.

• Effective date mechanism: The AD sets compliance timing by reference to the Requirement document and enacts a revised effective date, 30 August 2007, for the amendment (Compliance).

These concepts show the AD as an instrument that (i) identifies the affected fleet, (ii) delegates the technical remediation to another regulator's emergency AD and to manufacturer service bulletins, and (iii) unifies prior fragmented actions into a single CASA AD with a stated effective date. The text does not include a schedule of inspections or replacement intervals within the document itself; those details are located in the referenced EASA AD and service bulletins (Requirement; Note).

The AD directly affects operators and owners of Short SD3‑60 aeroplanes. The Applicability entry states "Model SD3‑60 aircraft, all serial numbers" (Applicability). That means any operator who has SD3‑60 airframes in service or storage is within scope.

Who pays: The document itself does not allocate costs between parties. Because the AD requires operators to "action in accordance with the requirements of EASA Emergency AD 2007‑0107‑E" and refers to manufacturer service bulletins for the corrective work, the immediate financial burden of inspection, modification, repair or replacement will fall on the aircraft operator or owner who must comply with the AD. The instrument contains no provision for financial assistance, subsidies, or indemnities (Requirement; Note; Compliance).

Who decides: CASA issued the AD and the document is signed by a CASA delegate, David Villiers, indicating the decision authority is CASA exercised through its delegate (signature block). The operative technical decisions, however, are largely delegated to the EASA Emergency AD and the manufacturer service bulletins. The AD therefore creates a two‑tier decision structure: CASA sets the legal obligation and effective date, while EASA and the aircraft manufacturer specify the technical rectification steps to be followed (Requirement; Note).

Maintenance organisations and maintenance engineers performing the remedial actions are indirectly affected because they must use the referenced service bulletins and any EASA‑approved revisions. Parts suppliers and manufacturers are affected if replacement brackets or approved reworks are required; the AD notes that earlier manufactured brackets "were not manufactured in conformity to the approved design standard" and also flags the issue of 'reworked' brackets (Background, Amendment 2 summary), which will affect parts inventory and acceptance criteria.

Regulators: The AD records interaction with other airworthiness regulators. It records that Amendment 1 was prompted by a UK CAA AD which cancelled previously issued ADs (Background), and Amendment 2 was issued in response to an EASA AD. That shows the AD is part of a multinational regulatory response affecting SD3‑60 operators in the CASA jurisdiction.

Other stakeholders: insurers, lessors and leasing managers are not mentioned in the source, but in practice they are likely to be interested because the AD imposes a mandatory safety requirement on the asset; the text itself does not address commercial arrangements. The AD makes no statement about operational grounding or movement restrictions; such actions would be determined by the technical requirements in the referenced documents.

Duties imposed by the AD are concise and expressed by reference. The key duty is to undertake the actions set out in EASA Emergency AD 2007‑0107‑E. The Requirement entry states: "Action in accordance with the requirements of EASA Emergency AD 2007‑0107‑E" and also calls out the relevant manufacturer service bulletins as the reference for carrying out those actions (Requirement; Note). The AD therefore imposes a duty on operators to comply with the EASA AD and the specified service bulletins or any later EASA‑approved revisions.

Rights and discretion included in the instrument are limited. The document allows for reference to "later EASA approved revisions" of the specified service bulletins, meaning operators may follow a later revision of the service bulletin provided that revision has EASA approval (Requirement Note). That provides some flexibility for operators to use updated service information, subject to EASA approval. The AD itself does not include a process for requesting alternative methods of compliance or exemptions; the instrument does not set out such procedures in the text provided. If such mechanisms exist elsewhere in CASA practice, they are not recorded in this document.

The AD specifies an effective date: the amendment "becomes effective on 30 August 2007" and compliance is "as specified in the Requirement document, with a revised effective date of 30 August 2007" (Compliance). Operators must respect that timing for carrying out the referenced actions.

Allocation of operational responsibility is implicit: the operator/owner of each SD3‑60 is responsible for ensuring that the required action per the EASA AD and the referenced service bulletins is completed. The AD places the technical prescription and corrective steps outside the text of the CASA AD and within the EASA AD and manufacturer documentation; hence, the duty is to comply with those external technical requirements.

The AD does not create any new property rights, compensation rights, or express administrative review rights within the supplied text. It does not specify record‑keeping obligations, post‑compliance reporting, or continued airworthiness surveillance beyond the referenced EASA AD and service bulletins. Those details, if required, must be sought in the EASA AD and the referenced manufacturer documents.

The text of this AD does not specify penalties, sanctions or enforcement procedures. The document states the Requirement and the applicable effective date, and it is signed by a CASA delegate, David Villiers, dated 20 July 2007; however the instrument does not include a penalties section, enforcement powers, or prescribed administrative sanctions within the lines of the source. The AD therefore imposes a mandatory obligation but does not itself contain express statutory penalty provisions in the supplied material (Requirement; Compliance; signature block).

What the AD does make clear is that compliance is required via incorporation by reference of EASA Emergency AD 2007‑0107‑E and specific service bulletins. In aviation regulatory practice, failure to comply with an AD typically affects the lawful airworthiness status of an aircraft; the source text does not state that consequence explicitly. The AD likewise does not set out an inspection schedule or a timetable of enforcement checks. Any enforcement, monitoring or sanctioning mechanism is outside the text provided here.

Because the AD was issued by CASA and signed by its delegate, the instrument establishes a legal expectation that operators will carry out the referenced measures. The absence of explicit penalty language in the document means the reader must rely on broader statutory and regulatory frameworks governing Australian aviation to determine the sanctions for non‑compliance; those frameworks are not contained in this document and therefore are not described here.

In short, the source establishes the mandatory requirement and effective date, but does not itself specify how CASA will detect non‑compliance, what administrative or criminal sanctions (if any) will follow non‑compliance, or what remedial enforcement steps CASA will take. Those enforcement details would need to be sourced from broader CASA enforcement policy or relevant aviation statutes, which are outside the scope of this document.

The AD explicitly imports obligations from other regulatory instruments and reflects regulatory coordination across jurisdictions. The Requirement instructs operators to "action in accordance with the requirements of EASA Emergency AD 2007‑0107‑E" and references Shorts Service Bulletins SD360‑55‑20 Revision 2 and SD360‑55‑A21 Revision 1, or later EASA‑approved revisions (Requirement; Note). That means the CASA AD functions as a national enforcement mechanism that makes compliance with an EASA emergency directive and manufacturer service bulletins a CASA obligation.

The Background records interaction with the UK Civil Aviation Authority (CAA). Amendment 1 "was prompted by a new UK CAA AD, which cancelled previously issued ADs 009‑06‑2003 (AD/SD3‑60/66) and G‑2004‑0032" (Background). This indicates that prior CASA ADs had been influenced by or mirrored UK CAA actions and that the UK CAA subsequently revised its approach, prompting a CASA amendment. Amendment 2 explicitly "is issued in response to a new EASA AD" and combines corrective actions into a single AD (Background). Therefore the CASA AD interlocks with EASA and UK CAA regulatory activity rather than operating in isolation.

The practical legal effect is that CASA has used its domestic AD instrument to require compliance with a foreign regulator's emergency AD and with manufacturer service documents. That integration implies operators must consult EASA AD 2007‑0107‑E and the referenced service bulletins to understand the substantive requirements; the CASA AD does not reproduce those technical obligations. Any conflict between the CASA AD and the referenced EASA AD is unlikely because the CASA AD expressly requires compliance with the EASA AD; however the CASA AD also permits operators to refer to "later EASA approved revisions" of the service bulletins, which creates an avenue for using updated EASA‑approved technical information.

The AD does not mention interaction with other Australian laws, such as civil aviation safety legislation, consumer law, contract law, or tort law. It does not purport to modify contractual rights under leases or insurance contracts; however making an AD mandatory will have downstream contractual implications for operators, owners, lessors and insurers. Those interactions are not documented in this AD and must be explored in the relevant legal instruments outside the text.

In sum, the AD operates by incorporating external regulatory and manufacturer material into a CASA legal obligation; it documents coordination with UK CAA and EASA actions and thereby meshes the CASA AD with other airworthiness regimes. The AD text itself does not contain further cross‑statutory adjustments or specified interagency enforcement provisions.

The document includes a concise account of amendment prompts and purposes. The text records an initial AD (not reproduced here) and two amendments. Key points in the amendment history, as stated in the source:

• Amendment 1: Prompted by a new UK CAA AD. The UK CAA action cancelled previously issued ADs 009‑06‑2003 (AD/SD3‑60/66) and G‑2004‑0032. This sequence followed an investigation by the Type Certificate Holder which revealed the new brackets were not manufactured in conformity with the applicable design data. The source states that Amendment 1 was a response to that UK CAA action and the Type Certificate Holder’s findings (Background).

• Amendment 2: Issued in response to a new EASA AD. Amendment 2 addresses the issue of 'reworked' brackets and "combines the necessary corrective actions into a single AD that assures the correct standard of elevator trim tab mass balance weight brackets are installed" (Background). The current document is AD/SD3‑60/68 Amendment 2.

• Effective date revision: The Compliance cell explicitly states that compliance is "as specified in the Requirement document, with a revised effective date of 30 August 2007" and that "This Amendment becomes effective on 30 August 2007" (Compliance).

• Signature and date: The AD is signed by David Villiers, Delegate of the Civil Aviation Safety Authority, with a signature date of 20 July 2007 (signature block). That indicates the timing of issuance and the delegate authority.

The AD also references the specific EASA Emergency AD number (2007‑0107‑E) that prompted Amendment 2 and the specific manufacturer service bulletins used to implement the corrective actions (SD360‑55‑20 Rev 2 and SD360‑55‑A21 Rev 1). The instruction to "refer" to these service bulletins allows for later EASA‑approved revisions to be used.

The source does not list earlier amendment texts in full nor does it provide the precise content of earlier ADs that were cancelled by the UK CAA. It does however describe the causal chain: manufacturer investigation → discovery of non‑conforming brackets → UK CAA action prompting Amendment 1 → EASA emergency AD prompting Amendment 2 and consolidation of corrective actions.

For practitioners, the amendment history recorded in the AD indicates that the matter has been the subject of iterative regulatory responses by multiple authorities and that operators should examine the progression of requirements as reflected in the EASA AD and the referenced service bulletins to ensure they comply with the latest consolidated corrective actions.

The text of this AD contains no litigation history. There are no court cases, appeals, or disputes recorded in the document. The AD records regulatory actions and administrative amendments prompted by findings from manufacturer investigation and by other aviation authorities (UK CAA and EASA), but it does not record any legal challenges to the ADs or to the underlying manufacturing non‑conformity.

Because the source is an administrative airworthiness directive, any litigation arising from enforcement, compliance costs, or related contractual disputes would be external to and not recorded in this document. The AD does not provide a record of judicial review, injunctions, or enforcement litigation. If litigation exists, it is not mentioned in the AD itself and would have to be researched separately in judicial or administrative decision records; such material is beyond the content of the provided text.

Therefore, within the boundaries of this source, there is no litigation history to summarise. Readers must not infer litigation outcomes, case law or precedential authority from this document alone because none is provided here.

This AD is short and to the point, but several practical traps and points of potential confusion follow directly from the text.

• Obligation by reference: The AD does not set out the corrective steps in the text; it requires action "in accordance with the requirements of EASA Emergency AD 2007‑0107‑E" and refers to specific service bulletins for technical detail (Requirement; Note). Operators who read only the CASA AD and not the referenced EASA AD and service bulletins will not have the full remedial prescription. The requirement is therefore contingent on consulting and correctly applying external documents.

• Scope wording: Applicability is "Model SD3‑60 aircraft, all serial numbers" (Applicability). That broad formulation includes all aircraft of the type irrespective of production batch. Operators should not assume that only certain serial number ranges are affected.

• Reworked brackets issue: Amendment 2 specifically addresses the issue of 'reworked' brackets (Background). That suggests that even replacement brackets that have been subject to rework need verification against the approved design standard. Operators who simply accept replacement parts without documentary proof of conformity to the approved design standard risk non‑compliance or continued risk of premature failure.

• Incorporation of later revisions: The AD permits the use of "later EASA approved revisions" of the specified service bulletins (Requirement Note). Operators must ensure any later revision is indeed EASA approved; using an unapproved or locally modified service instruction would not meet the AD's stated compliance pathway.

• Timing: The Compliance entry revises the effective date to 30 August 2007 (Compliance). That means that where the EASA AD or service bulletin sets out specific compliance intervals, operators must be attentive to the CASA effective date for the purposes of regulatory compliance in the Australian jurisdiction.

• Consolidation may obscure prior instructions: The AD "combines the necessary corrective actions into a single AD" (Background). Consolidation can be useful, but it may also change how earlier local ADs or technical instructions were implemented. Operators should review the consolidated direction carefully to ensure they have satisfied all prior and current requirements.

• No penalties or enforcement language in the document: The absence of explicit enforcement or penalty clauses in the text may lead some readers to misread the AD as advisory. The Requirement, however, is framed as a directive; operators should treat it as mandatory and consult CASA practice or aviation law for enforcement implications because the AD itself does not state them (Requirement; Compliance).

• Record of authority: The AD is signed by a CASA delegate (signature block). Operators should confirm that they are following the latest CASA AD version and the referenced EASA AD to ensure they meet the current legal requirement.

These "gotchas" follow directly from the document’s structure: mandatory importation of external technical documents, broad applicability, attention to reworked parts, and a lack of on‑face enforcement detail. Each point derives from the text provided (Applicability; Requirement; Note; Background; Compliance).

The AD prescribes compliance by direct reference. The following compliance checklist is a distilled reading of the document; every step is traceable to the relevant entry in the source.

1. Confirm applicability to your aircraft: Verify whether the aeroplane in question is a Short SD3‑60. Applicability reads "Model SD3‑60 aircraft, all serial numbers" (Applicability). If your aircraft is an SD3‑60, the AD applies.

2. Obtain the referenced EASA Emergency AD: The Requirement directs operators to "action in accordance with the requirements of EASA Emergency AD 2007‑0107‑E" (Requirement). Obtain that EASA document in full to see the specific inspections, corrective actions, parts replacement, or limitations it prescribes.

3. Obtain and follow the referenced manufacturer service bulletins: The AD refers to "Shorts Service Bulletins SD360‑55‑20 Revision 2 and SD360‑55‑A21 Revision 1, or later EASA approved revisions" (Requirement Note). Acquire those service bulletins and follow their procedures. If more recent EASA‑approved revisions exist, operators may use them, subject to ensuring they are EASA approved.

4. Address 'reworked' brackets: Amendment 2 specifically addresses the issue of reworked brackets and consolidates corrective actions to "assure the correct standard of elevator trim tab mass balance weight brackets are installed" (Background). In practice that means verify that any replacement or repaired brackets conform to the approved design standard; if the service bulletins or EASA AD mandate replacement rather than repair, follow that prescription.

5. Schedule and perform the work in line with the effective date: The AD and Compliance entry set a revised effective date of 30 August 2007 and state the amendment "becomes effective on 30 August 2007" (Compliance). Ensure the actions are scheduled and completed in accordance with the timeframes set out in the EASA AD and service bulletins, considering the CASA effective date for Australian regulatory compliance.

6. Use only EASA‑approved revisions where allowed: The Requirement Note permits later EASA‑approved revisions of the named service bulletins. Confirm the revision status and EASA approval before relying on a later revision.

7. Liaise with maintenance organisations and parts suppliers: Because the defect arises from manufacturing non‑conformity, ensure suppliers can provide parts traceable to conforming standards and that maintenance organisations understand the requirement to verify conformity, including for reworked components (Background).

8. Document completion relative to the EASA AD and service bulletins: While the AD text does not set out record‑keeping instructions, satisfying the AD will require documented evidence that the EASA AD and the referenced service bulletins were followed. Keep copies of the EASA AD, the service bulletin revision used, and maintenance records showing compliance.

9. Monitor for further regulatory updates: The AD consolidates earlier actions and refers to EASA; monitor CASA, EASA and manufacturer communications for any subsequent ADs or approved revisions that could alter compliance steps or timelines. The amendment history shows regulatory evolution (Background, Amendment 1 and Amendment 2 summary).

10. If in doubt, contact CASA for clarification: The AD is signed by a CASA delegate and is a domestic legal instrument referencing external technical material (signature block). For ambiguous technical or compliance questions, contact CASA or the approved maintenance organisation to obtain binding guidance.

All these compliance steps are grounded in the four key entries in the AD: Applicability, Requirement, Note and Compliance, and in the Background explanation that draws attention to non‑conforming and reworked brackets. The AD does not provide the precise inspection or replacement intervals within its text; those specifics must be followed as set out in EASA Emergency AD 2007‑0107‑E and the referenced Shorts service bulletins.