AD/B717/1 Amdt 2 - Horizontal Stabiliser Jackscrew

The document uses a compact set of concepts to convert a foreign safety directive into an Australian mandatory requirement. The main concepts are:

• Adoption by reference, via a foreign regulator’s AD. The Requirement fields state operators must take "Action in accordance with the technical requirements of FAA AD 2000-15-15 Amendment 39-11847" and to use Boeing SB 717-27-A0002 Rev 3 (or a later FAA-approved revision) as the accomplishment instructions. The AD therefore relies on the FAA document to supply the detailed inspection intervals, procedures, compliance times, and corrective actions.

• Applicability as a bright-line model-based scope. Applicability is "All Model 717-200 aircraft" (Applicability). The AD does not specify serial numbers, operator classes, or exemptions in the provided text; the model designation is the operative scope.

• Use of a manufacturer's service bulletin as the execution vehicle. The AD directs compliance via Boeing SB 717-27-A0002 Revision 3 and permits later revisions only if the FAA has approved them as an AMOC. That ties the mandatory remedy to the manufacturer's procedural document, subject to FAA approval for alternative methods.

• Alternate Means of Compliance (AMOC) with external approval. The text permits use of "a later revision that has been approved by the FAA as an alternate means of compliance (AMOC)". The AD therefore places discretion over acceptable alternatives with the FAA rather than with the issuer of the Australian AD (the CASA delegate), at least as described here.

• Safety trigger and required activity. The Background explains the safety trigger,reports of metallic shavings,and the remedial activity required in prior amendments: inspection of lubrication for metallic particles, inspection of adjacent areas, and follow-on/corrective actions. The current amendment updates service bulletin references and AMOC wording.

These concepts create a compliance architecture where Australian operators must implement a FAA-prescribed technical regime, using a Boeing SB as the practical method, and may only use alternate methods if the FAA approves them. The AD updates the reference version to ensure that the instructions that operators must follow are the specified revision or an FAA-approved later revision.

The AD explicitly affects operators and owners of all Boeing Model 717-200 aircraft. The Applicability box states "All Model 717-200 aircraft." That phrasing draws a direct line from the instrument to every airframe of that model in scope, irrespective of operator size, ownership structure, leasing status, or whether the aircraft is in commercial, private, or other operation, as no carve-outs are specified in the provided text.

Practical roles that will bear the obligations include maintenance organisations, aircraft operators, and those responsible for continuing airworthiness management. The Requirement directs that actions be "in accordance with the technical requirements of FAA AD 2000-15-15" and the accomplishment instructions contained in Boeing SB 717-27-A0002 Revision 3 (Requirement), so the personnel who normally perform service bulletin tasks, inspections, lubrication analysis and corrective maintenance will be tasked to execute the AD.

Because the AD references the FAA AD and a Boeing service bulletin, parties who maintain records, negotiate leases, or manage airworthiness compliance (for example leasing companies, third-party maintenance providers, and continuing airworthiness management organisations) will be affected in their documentation and maintenance scheduling practices. The AD’s compliance statement "As specified in the requirement document" makes adherence contingent on the details found in the FAA AD and the Boeing SB, so those administrators must obtain and follow those documents.

The document names the FAA as the authority for approving alternate methods of compliance (AMOC). The Requirement explicitly permits only later Boeing SB revisions "that has been approved by the FAA as an alternate means of compliance (AMOC)". That is an allocation of decision-making power: an Australian operator seeking to use a different procedure will need FAA AMOC approval to rely on a later SB revision as compliant under this AD, according to the text provided.

Finally, the AD affects safety oversight and enforcement agents inside CASA because the instrument is issued by a CASA delegate (David Villiers) and becomes effective on the stated date, generating an enforceable obligation within the Australian regime once effective.

Duties

• Implement the FAA-prescribed technical requirements. The AD requires operators to "Action in accordance with the technical requirements of FAA AD 2000-15-15 Amendment 39-11847 for the Model 717-200 aircraft" (Requirement). The detailed nature of the duty,inspection intervals, procedure steps, corrective action thresholds,lies in the FAA AD and Boeing SB, which the operator must obtain and follow.

• Use the specified Boeing service bulletin, or an FAA-approved later revision. The AD mandates accomplishment instructions "contained in Boeing SB 717-27-A0002 Revision 3 or a later revision that has been approved by the FAA as an alternate means of compliance (AMOC)" (Requirement). Operators must therefore follow Rev 3, unless they hold FAA AMOC approval for a later revision.

• Perform inspections and corrective actions as framed in prior amendments. The Background records that Amendment 1 required "inspecting for metallic particles in the lubrication for the jackscrew assembly, inspection of the surrounding area to detect any discrepancy, and provided follow-on and corrective actions." The current amendment carries forward those technical expectations via the FAA AD reference.

• Comply within the times and methods specified in the requirement document. The Compliance box states "As specified in the requirement document." This places on operators the duty to comply with the precise compliance times and procedural requirements set out in the FAA AD/Boeing SB.

Rights and procedural features

• Right to use FAA-approved AMOCs. The AD permits later Boeing SB revisions only if "approved by the FAA as an alternate means of compliance (AMOC)" (Requirement). That creates a pathway for operators to use updated or alternative procedures, subject to FAA approval.

• The AD’s effective date is stated, giving operators a temporal boundary for when compliance becomes mandatory. The instrument "becomes effective on 7 July 2005" (Compliance). Operators therefore have clear notice of when the duty crystallises.

• The AD’s reliance on an external technical specification (the FAA AD and Boeing SB) means operators have the right to consult those documents for the fine detail of obligations. The AD ties compliance to those documents rather than restating the technical minutiae in the Australian instrument.

Allocation of decision-making

• Technical decision-making on acceptable alternative procedures is allocated to the FAA. The AD explicitly conditions acceptance of later SB revisions on FAA AMOC approval. The CASA delegate issued the AD, but the text leaves the AMOC approval gate with the FAA. That affects who decides whether an operator may use a different approach in practice.

The AD does not, in the text provided, specify enforcement mechanisms, penalties, or appeals processes beyond the effective date or provide an explicit CASA AMOC pathway. It places a duty on operators to comply with a specified foreign AD and service bulletin, preserving an operator’s procedural right to seek an FAA AMOC.

The AD text supplied does not set out express penalties, monetary sanctions, or the enforcement procedures in statutory detail. The table contains the standard AD components: Applicability, Requirement, Compliance, Effective date, and Background. The Compliance box states "As specified in the requirement document." That means the AD mandates actions, but the instrument as provided does not itself include explicit penalty clauses.

From the structure and content of the AD the enforcement regime is implicit rather than elaborated in the text supplied.

• Implied enforcement mechanisms. The AD creates a mandatory obligation to carry out the actions prescribed by the FAA AD and Boeing SB. Historically, airworthiness directives are legally enforceable instruments; this document is presented as an AD issued by a CASA delegate (signature: David Villiers, Delegate of the Civil Aviation Safety Authority). The signature and effectiveness statement show it is an official CASA action. Non-compliance with a CASA AD typically exposes operators to CAB/administrative enforcement and may affect the aircraft’s continuing airworthiness status, but the supplied text does not spell out the enforcement steps or penalties.

• Role of documentation and continuing airworthiness. Because compliance is "As specified in the requirement document," operators will need to maintain records showing inspections and corrective actions were completed per the FAA AD and Boeing SB. Absent such records an operator could be exposed to regulatory action by CASA, however the AD text does not prescribe the evidentiary standards or enforcement penalties.

• AMOC approvals and compliance defences. The AD allows use of later Boeing SB revisions only when "approved by the FAA as an alternate means of compliance (AMOC)". That creates a mechanism by which operators can lawfully deviate from the specified SB only with FAA approval. The AD does not specify whether CASA will accept an FAA AMOC unilaterally, but the text conditions acceptance of later SB revisions on FAA approval.

• Effective date as enforcement threshold. The AD becomes effective on "7 July 2005", making the duties enforceable from that date. Compliance prior to that date is therefore not mandated by this instrument, and after that date failure to have complied with the requirements specified in the FAA AD/Boeing SB could expose the operator to regulatory consequences, as determined by CASA's enforcement framework (not detailed in the text provided).

Because the supplied document does not enumerate penalties or the precise enforcement process, readers should treat enforcement as implicit in the AD framework and look to CASA’s broader regulatory and enforcement instruments for procedural detail. The AD itself signals an enforceable safety requirement, with compliance judged against the FAA AD and Boeing SB.

The instrument explicitly interacts with foreign regulatory and manufacturer documents, rather than spelling out intersections with broader domestic statutes in the provided text. The primary interactions are:

• Adoption by reference to a foreign regulator’s AD. The Requirement instructs action "in accordance with the technical requirements of FAA AD 2000-15-15 Amendment 39-11847." That means the Australian AD incorporates, by direction, the FAA AD as the operative technical standard for compliance. The FAA AD contains the detailed inspection requirements and corrective-action protocol; the Australian instrument therefore imports those technical obligations into the domestic compliance architecture.

• Reliance on a manufacturer's service bulletin. The AD points to "Boeing SB 717-27-A0002 Revision 3 or a later revision that has been approved by the FAA as an alternate means of compliance (AMOC)" as the detailed accomplishment instructions. That binds operator actions to a manufacturer-generated document, subject to FAA approval for later revisions.

• Allocation of AMOC authority to the FAA. The text ties acceptance of later service bulletin revisions to FAA approval as an AMOC. That places procedural interaction with an external regulator (the FAA) rather than leaving the AMOC gate solely to CASA in this instrument, as written.

• Procedural status within CASA’s regulatory instrument set. The AD is issued by a CASA delegate (the signature is shown: David Villiers, Delegate of the Civil Aviation Safety Authority). As an AD, it sits within CASA’s safety oversight instruments and will interact with domestic continuing airworthiness requirements, maintenance recordkeeping duties, and any national enforcement powers CASA exercises. The instrument does not itself state how it interacts with other domestic provisions such as maintenance release rules, flightworthiness certificates, or policing powers; the AD’s text confines itself to mandating the technical requirements and pointing to the FAA AD and Boeing SB for the particulars.

• Temporal interaction with prior amendments. The Background records an earlier Amendment 1 effective 2 November 2000 and an original issue effective 5 October 2000. The current amendment updates the service bulletin revision status and clarifies AMOC provisions. That shows the AD interacts with and supersedes or amends prior AD iterations for the same hazard in the Boeing 717-200 jackscrew context.

The AD does not reference specific Australian statutes or regulations in the provided text. Its main legal cross-references are external: the FAA AD and Boeing SB. Operators will therefore need to manage compliance by consulting those foreign documents and then aligning their domestic maintenance and airworthiness paperwork with CASA expectations for AD compliance.

The AD text contains an internal timeline of issuance and prior amendments related to the jackscrew issue. The elements recorded are:

• Original issue: The Background notes "The original issue of this Airworthiness Directive became effective on 5 October 2000." That marks the initial imposition of mandatory action on the jackscrew issue.

• Amendment 1: The Background records "Amendment 1, effective 2 November 2000, was issued in response to a new FAA AD which required inspecting for metallic particles in the lubrication for the jackscrew assembly, inspection of the surrounding area to detect any discrepancy, and provided follow-on and corrective actions." Amendment 1 therefore incorporated or responded to a subsequent FAA AD and added the described inspection and corrective obligations.

• Current amendment (Amendment 2): The header and Compliance cell show this instrument as "AD/B717/1 Amdt 2 ... 7/2005" and state "This Amendment becomes effective on 7 July 2005." The Background explains the current amendment "updates the referenced service bulletin revision status, as well as providing some clarification of the alternative method of compliance provisions." The AD is dated 25 May 2005 and signed by a CASA delegate.

Taken together, the amendment history is a short sequence: original AD (effective 5 October 2000), Amendment 1 (effective 2 November 2000) addressing inspections and corrective actions, and the present Amendment 2 (effective 7 July 2005) updating the Boeing SB reference and AMOC wording. The sequence indicates iterative regulatory responses to either new information from the FAA or to updated manufacturer instructions.

The AD text does not include a full register of all previous textual changes or the precise redline of what wording was amended between versions. It records the effective dates and the high-level reasons for amendment: the initial safety action, the incorporation of inspection/corrective actions in Amendment 1, and an update to SB revision status plus clarification of AMOC provisions in Amendment 2.

The provided document contains no litigation references. It does not mention any judicial challenges, appeals, administrative review proceedings, or court determinations relating to the AD. The only legal procedural text in the document is the AD itself, the signature of the CASA delegate (David Villiers), and dates of effect and prior amendments.

Therefore, based solely on the text supplied:

• No litigation is recorded in the AD document.

• No cases, disputes, or enforcement proceedings are referenced or recited in the Background or other cells.

If a practitioner requires information on any challenge, appeal, or enforcement action that may have arisen from this AD, that material is not contained in the document provided and will need to be sourced from CASA files, court records, or administrative appeal records outside this AD text.

The instrument is compact, but a number of practical pitfalls arise from how it frames compliance and references external documents. The following items are explicit or strongly implied by the source text.

• The AD ties compliance to external instruments rather than stating the technical steps in full. The Requirement directs action "in accordance with the technical requirements of FAA AD 2000-15-15 Amendment 39-11847" and the Boeing SB as the accomplishment instructions. The AD therefore requires operators to obtain and read the FAA AD and Boeing SB to know the exact inspection tasks, intervals, acceptance criteria, and corrective actions. An operator who relies on the AD text alone without consulting the FAA AD and Boeing SB risks omitting required steps.

• AMOC acceptance is conditioned on FAA approval. The AD permits later Boeing SB revisions only if "approved by the FAA as an alternate means of compliance (AMOC)". Practically, this means that an operator cannot unilaterally adopt a later SB revision as compliant unless the FAA has approved that later revision as an AMOC. If an operator mistakenly assumes that any later Boeing SB revision is acceptable without FAA AMOC, they risk non-compliance.

• The AD does not itself specify enforcement penalties or the recordkeeping standard. The short "Compliance" cell says "As specified in the requirement document." That leaves open the evidentiary question of what proof CASA will want to see. Operators must therefore anticipate that CASA will expect records demonstrating adherence to the FAA AD/Boeing SB, but the AD does not define the form, retention period, or audit process.

• The AD’s applicability is model-wide. It applies to "All Model 717-200 aircraft." That may catch leased airframes, engineless ferried aircraft, or aircraft in storage; operators must check whether the AD’s requirements are triggered by their operational status or maintenance schedules under the FAA AD/Boeing SB. The AD text does not carve out conditions for aircraft that are out of service or in storage.

• Timing and transitional issues. The AD becomes effective on "7 July 2005". Operators must reconcile any inspections that would otherwise have been scheduled under prior AD iterations and ensure there is no gap or duplication of inspections when moving from Amendment 1 to Amendment 2. The AD does not provide transitional guidance or grace periods; it simply sets the effective date.

• The AD references metallic shavings and the risk of "loss of vertical control." Those phrases identify the hazard but do not quantify risk thresholds or acceptable wear tolerances; those specific acceptance criteria will be in the FAA AD or Boeing SB. Operators must not presume that the presence of some metallic particles is automatically permissible.

• The AD delegates signature is a CASA delegate but the AMOC approval language only references the FAA. The document does not indicate whether CASA will accept FAA AMOC decisions automatically or whether CASA will require separate domestic acceptance or notification. Operators should not assume domestic acceptance without confirming CASA practice.

• Lack of domestic amendment detail. The Background says this Amendment "updates the referenced service bulletin revision status, as well as providing some clarification of the alternative method of compliance provisions." The AD does not reproduce those clarifications in full; operators must consult the AD, the FAA AD, and Boeing SB Rev 3 to understand what changed and what that means for previously planned work.

These "gotchas" arise from the AD’s structure: reliance on external technical documents, appointment of the FAA as the gatekeeper for AMOCs, model-wide applicability, and minimal domestic procedural text. Each of these items requires operators to take affirmative steps to obtain the referenced documents and to confirm procedural acceptance with the FAA and CASA as appropriate.

The AD’s compliance pathway is procedural and document-driven. The following step-by-step checklist is grounded in the wording of the AD and the Background notes. Each step explicitly follows what the AD requires or implies.

1. Confirm applicability to your aircraft. The AD applies to "All Model 717-200 aircraft" (Applicability). Verify your airframe is a Model 717-200 and therefore within scope.

2. Obtain the FAA AD referenced. The Requirement mandates action "in accordance with the technical requirements of FAA AD 2000-15-15 Amendment 39-11847." Obtain that FAA AD text to read the specific inspection intervals, methods, acceptance criteria, and required corrective actions.

3. Obtain Boeing SB 717-27-A0002 Revision 3. The AD directs operators to follow the accomplishment instructions "contained in Boeing SB 717-27-A0002 Revision 3" or a later FAA-approved revision. Secure Rev 3 and familiarise maintenance personnel with the procedures it contains.

4. If you intend to use a later Boeing SB revision, secure FAA AMOC approval. The AD conditions use of later SB revisions on their being "approved by the FAA as an alternate means of compliance (AMOC)." If you plan to rely on a later revision, ensure the FAA has granted AMOC approval for that revision before executing the work.

5. Schedule and perform the inspections described. The Background and Amendment 1 indicate inspection tasks include "inspecting for metallic particles in the lubrication for the jackscrew assembly, inspection of the surrounding area to detect any discrepancy, and provided follow-on and corrective actions." Execute the inspection tasks at the intervals and to the methods specified in the FAA AD and Boeing SB.

6. Execute corrective actions when inspection triggers occur. The FAA AD and Boeing SB will describe thresholds and corrective measures for wear, metallic particle contamination, or other discrepancies found during inspection. Carry out those follow-on and corrective actions as specified.

7. Maintain records documenting compliance. Although the AD text does not stipulate recordkeeping detail, compliance evidence will typically be necessary. Keep inspection reports, findings, maintenance actions, parts replaced, and any FAA AMOC correspondence. These records support that the inspections and corrective actions were completed "as specified in the requirement document."

8. Confirm effective date and timing. The AD "becomes effective on 7 July 2005." Ensure inspections and any scheduled maintenance actions are aligned with the effective date and with any compliance times specified in the FAA AD.

9. Coordinate with the relevant regulatory and maintenance stakeholders. Because the AD relies on the FAA AD and ties AMOC approval to the FAA, coordinate with your FAA point of contact if operating under a US registry or if seeking AMOC approval. Also notify or consult CASA as needed for domestic acceptance, recordkeeping, and possible audit expectations.

10. Review Amendment history and ensure no prior outstanding obligations. The Background notes previous AD versions (original issue effective 5 October 2000 and Amendment 1 effective 2 November 2000). Confirm whether any prior scheduled inspections remain outstanding and whether Amendment 2 changes affect previously planned work.

11. Seek clarification where the AD is ambiguous. If the FAA AD or Boeing SB terms are unclear, seek clarification from the FAA, Boeing, or CASA, as appropriate. Because the AD conditions AMOCs on FAA approval, clarification from the FAA will be necessary if you propose an alternative method.

Following this compliance path aligns with the instrument’s stated requirements: execute actions in accordance with FAA AD 2000-15-15 Amendment 39-11847, use Boeing SB 717-27-A0002 Revision 3 (or later FAA-approved revision), and perform inspections and corrective actions as specified in the requirement document, on or after the effective date of 7 July 2005.