AD/F100/73 Amdt 1 - Wing-to-Fuselage Fairings

The directive affects three classes of persons and entities directly, and a broader set indirectly.

• Operators and owners of the affected aircraft: The AD applies to Model F.28 Mk.0100 and Mk.0070 aircraft, all serial numbers (see “Applicability”). That means every operator who has one of those airframes on its Australian register, and likely those responsible for airworthiness where the AD applies, must carry out the required inspection and sealing. Because the AD prescribes the method by reference to a Fokker Services service bulletin, the owner/operator is the practical decision-maker for commissioning and scheduling the work (see “Requirement”).

• Maintenance organisations and certificated personnel: Compliance requires the work to be performed in accordance with the Accomplishment Instructions of SBF100-53-107 (26 Feb 2008) or a later EASA-approved revision. That presumes access to appropriate maintenance capability, technical data, and materials to apply a fillet seal and to inspect the aerodynamic seal and fuselage skin. Maintenance organisations engaged by operators will therefore carry out the inspection, interpretation of the SBF, and the physical sealing work.

• Civil Aviation Safety Authority (CASA): The AD is issued by CASA (signed by a CASA delegate), and CASA is the issuing regulator identified in the document (see signature). The regulator sets the effective date and compliance timeframe and is the originator of the amendment.

Indirectly affected parties include suppliers of seals, adhesives, or parts specified in the Fokker service bulletin, and the aircraft dispatch planners because mod-related downtime may affect availability. The text does not identify pilots, passengers, or third parties as having duties, but it states that the AD’s purpose is to prevent conditions that previously caused roll control difficulties during flight (see “Background”), which is a safety outcome relevant to all who operate or use the aircraft.

The document does not allocate explicit financial responsibility, but the combination of operational and maintenance obligations implies the owner/operator will arrange and fund the inspection and sealing work, and coordinate with maintenance providers to comply with the stated compliance period. The AD’s universal applicability within the specified models and its linkage to a manufacturer service bulletin means there is no statutory exemption or selective applicability described in the text.

The AD imposes a narrow set of duties and leaves broader rights and enforcement mechanisms outside the text.

Duties imposed in the text:

• Inspect the aerodynamic seal of the wing-to-fuselage fairings and the fuselage skin (see “Requirement”).
• Apply an improved sealing by means of a fillet seal, in accordance with the Accomplishment Instructions of Fokker Services SBF100-53-107, dated 26 February 2008, or a later EASA-approved revision (see “Requirement”).
• Complete this work within 12 calendar months after 3 July 2008, with the amendment effective from 3 July 2008 (see “Compliance”).

The AD also explicitly notes EASA AD 2008-0079 is relevant (see “Requirement: Note”), which places an interpretive obligation on operators to consider the related European directive and to ensure they use either the specified SBF or a later revision but only if that later revision has EASA approval.

Rights and limits in the document:

• The text does not provide any express exemptions, variances, or alternative compliance procedures within the document itself. It does permit an alternative only implicitly by allowing “later EASA approved revision” of the service bulletin, meaning operators may rely on a subsequent EASA-approved SBF revision instead of the dated one listed (see “Requirement”).

• The AD does not include express provisions for extensions, delegations, or deferrals in the text. No rights to compensation, cost-sharing, or repair-time extensions are contained in the document.

• The directive does not itself include any operational relief or temporary measures (for example, allowing restricted operations pending compliance). It requires completion within the stated compliance period.

Because the AD achieves technical prescription by reference to a manufacturer service bulletin, the duty is effectively to follow the SBF’s Accomplishment Instructions. The operator’s permissible course is therefore to adopt the specified SBF (26 February 2008) or, if available and EASA-approved, a later revision, and to schedule and carry out the inspection and fillet sealing within the stated time window.

The directive text contains limited information about penalties and enforcement. What the document states and what it does not state should both be noted.

Explicit statements in the text:

• The AD is presented as an amendment that becomes effective on 3 July 2008 and sets a compliance deadline of “within 12 calendar months after 3 July 2008” (see “Compliance”).
• The instrument is issued by the Civil Aviation Safety Authority, signed by its delegate, indicating the issuing authority (see signature).

What the text does not contain:

• The document does not specify any statutory penalties, fines, suspension mechanisms, criminal sanctions, or administrative enforcement steps for non-compliance. No clauses in the provided text set out an enforcement regime, remedial notices, or appeal rights.

Implications for practitioners relying solely on this text:

• The AD imposes a mandatory technical requirement with an effective date and compliance timeframe; however, the text does not describe the legal consequences of failing to comply. To determine enforcement mechanisms, penalties, or enforcement process, a reader must consult the broader administrative or aviation regulatory framework that governs CASA-issued ADs. That framework is not reproduced in the supplied text.

• The presence of an explicit effective date and a defined deadline signals that the issuing regulator intended a time-bound, mandatory measure, but the absence of penalty language in the text means this document alone cannot be read as prescribing what happens if an operator does not comply.

• The AD’s reliance on an external service bulletin and a cross-reference to EASA AD 2008-0079 suggests that regulatory conformity and possible enforcement assessment may depend on verification that the inspection and sealing were done in accordance with the stated SBF or an EASA-approved revision. The text, however, does not set out how compliance will be audited, certified, or recorded.

For legal or compliance certainty about enforcement and penalties, the reader must therefore treat the directive as a mandatory technical requirement but seek the applicable CASA enforcement provisions and administrative practice outside this document, because those matters are not detailed within the AD itself.

The AD references related regulatory material but does not itself reproduce or amend other legislative instruments. The only cross-reference present in the text is to an EASA airworthiness directive and to a Fokker Services service bulletin.

• EASA AD linkage: The Requirement includes a Note stating “EASA AD 2008-0079 refers.” This explicitly connects the CASA amendment to an EASA airworthiness directive; the AD was prompted by that European AD and the amendment is issued in response to a new EASA AD (see “Requirement: Note” and “Background”). Practically, that means there is an interaction in which CASA’s amendment aligns with or mirrors action taken by EASA, and it conditions the acceptability of later revisions of the SBF on EASA approval (see “Requirement”).

• Incorporation by reference to a service bulletin: The AD prescribes compliance through the Accomplishment Instructions of Fokker Services SBF100-53-107 dated 26 February 2008, or a later EASA-approved revision (see “Requirement”). This creates an operational interaction between the regulatory instrument and private-sector technical material. The AD does not reproduce technical details; it imports them by reference, making the service bulletin part of the compliance regime to the extent the AD requires adherence.

• No mention of domestic legislative amendment: The text does not claim to amend, repeal, or otherwise alter any domestic statute or regulation beyond being an AD issued by the regulator. It does not, for example, quote or change provisions of the Civil Aviation Act or other statutes in the supplied text.

• Absence of cross-references to other domestic instruments: The AD contains no explicit cross-references to other Australian legislative instruments, manuals, certification rules, or enforcement regulations. Therefore, within the scope of the supplied text, the only explicit external interactions are with (i) the named Fokker Services service bulletin and (ii) the EASA AD.

In short, within the four corners of this document, interaction with other laws is limited and effected by reference: operators must follow a manufacturer service bulletin (which itself may incorporate technical standards) and should treat the EASA AD as a related authority. Any further interoperation,such as how CASA enforces ADs domestically or how records must be kept under Australian aviation law,is not described in the supplied instrument and must be established from the broader regulatory corpus.

The text itself is an amendment and records the principal changes and dates relevant to this action.

• Instrument identity: The AD is cited as AD/F100/73 Amdt 1, captioned “Wing-to-Fuselage Fairings” with the date marker 7/2008 (see top table).

• Origination and signature: The document is signed by David Villiers, Delegate of the Civil Aviation Safety Authority, and dated 16 May 2008 (see signature block).

• Effective date: The AD states that “This Amendment becomes effective on 3 July 2008” (see “Compliance”).

• Compliance timeframe: The text places the required work “Within 12 calendar months after 3 July 2008” (see “Compliance”). That sets the one-year compliance window anchored to the effective date.

• Source technical document and revision control: The AD requires compliance in accordance with Fokker Services SBF100-53-107 dated 26 February 2008, or a later revision provided that later revision has EASA approval (see “Requirement”). This shows the amendment’s technical requirements are tied to a dated service document and explicitly allows substitution only if the later service bulletin revision carries EASA approval.

• Rationale for the amendment: The Background section describes that Amendment 1 was issued in response to a new EASA AD, which itself was prompted by new reports of moisture-related problems in the same area (see “Background”). The amendment therefore represents a follow-on or tightening step to an earlier AD or to previously issued guidance.

• Nature of the required action under the amendment: Amendment 1 mandates an additional one-time inspection and application of improved sealing. The AD therefore augments prior requirements by adding a specific sealing task and an additional inspection protocol derived from a new service bulletin (see “Background”).

The text does not include a history of previous amendments beyond identifying itself as Amendment 1. It does not set out a timeline of prior AD versions or earlier compliance actions apart from connecting this amendment to the EASA AD that prompted it. Any prior AD content, rescissions, or successive amendments are not reproduced in the supplied text and would need to be retrieved from the regulatory record to build a complete amendment chain.

The supplied instrument contains no litigation history or references to judicial proceedings. The document is strictly an administrative airworthiness directive and its text does not mention any court cases, appeals, enforcement proceedings, or disputes arising from this AD.

What is in the text:

• The AD records the technical requirement, effective date, compliance deadline, the service bulletin to be followed, and the issuing authority’s delegate signature (see “Requirement,” “Compliance,” signature block). It does not make any mention of disputes, appeals, or precedent decisions.

What the absence implies for practitioners reading only this document:

• There is no record in the supplied text of any challenge to, negotiation over, or judicial interpretation of this AD. The document does not describe an appeal mechanism or administrative review process within its content.

• For parties seeking to understand whether this AD has been the subject of litigation or precedent, the supplied text provides no information. Inquiry into litigation would require consulting external sources, such as judicial databases, tribunal records, or CASA enforcement records, none of which are included here.

Therefore, based solely on the supplied AD text, there is no litigation history to report.

The AD is concise but contains several technical and compliance traps that may cause confusion or missed obligations if read too quickly. The following points are grounded in the text and highlight potential operational or interpretive pitfalls.

• Universal applicability within models: The AD applies to “Model F.28 Mk.0100 and Mk.0070 aircraft, all serial numbers” (see “Applicability”). That wording leaves no serial-number carve-outs. Operators who assume only a subset is affected risk non-compliance.

• Incorporation by reference and approval criterion: The AD requires following the Accomplishment Instructions of Fokker Services SBF100-53-107 dated 26 February 2008, “or later EASA approved revision” (see “Requirement”). Two practical risks flow from that clause:

  • Using a later Fokker revision that does not have explicit EASA approval will not meet the AD’s stated condition.
  • Operators who rely on a newer service bulletin without checking the EASA approval status may inadvertently use non-conforming instructions.

• Ambiguity on scope of inspection: The AD mandates inspection of “the aerodynamic seal of the wing-to-fuselage fairings and the fuselage skin” (see “Requirement”). The text does not define inspection criteria, acceptance limits, or pass/fail thresholds , those details are in the SBF. Relying solely on the AD without consulting the SBF risks inconsistent inspection outcomes.

• Timing anchored to effective date: The compliance window is “Within 12 calendar months after 3 July 2008” (see “Compliance”). That specific anchor means that operators must calculate the deadline from 3 July 2008 rather than from the date of the AD’s signature (16 May 2008) or the date they receive the bulletin. Mistaking the anchor date could lead to late compliance.

• One-time nature and future recurrence: The Background and Amendment note that the AD mandates “an additional one-time inspection and application of improved sealing” (see “Background”). Operators should not assume the absence of recurring inspections; however, the AD itself prescribes a one-off action only. Maintenance programmes that automatically schedule recurring checks may need to consider whether further monitoring is required, but such decisions fall outside this text.

• No recordkeeping or certification language: The AD does not state what records must be kept to prove compliance, nor does it specify who must certify the compliance action. The lack of explicit documentation requirements in the AD (see whole text) means operators must consult their normal regulatory obligations or the SBF to determine how to evidence completion.

• Cross-jurisdictional dependencies: The AD expressly refers to EASA AD 2008-0079 (see “Requirement: Note”) and conditions later SBF revisions on EASA approval. Operators or maintenance organisations operating across jurisdictions must ensure that any later revisions they adopt have the stated EASA approval, not merely manufacturer endorsement.

• Lack of enforcement detail in the text: There are no penalties or enforcement steps set out in the AD itself (see “Penalties and enforcement”). Operators who assume the AD contains all enforcement consequences risk being unaware of relevant external enforcement regimes and administrative practices.

• Responsibility for costs and scheduling not specified: The AD does not allocate costs or prescribe operational restrictions during the work. The likely burden of arranging and paying for the inspection and sealing rests with the operator, but this inference is not spelled out in the AD.

Readers should therefore treat the AD as a time-limited, technically prescriptive obligation that must be satisfied by following the named SBF; failure to check the SBF, the EASA approval status of later revisions, or the precise compliance deadline are practical gotchas that the AD itself does not resolve.

The AD prescribes a clear, limited compliance pathway by reference: obtain and follow the Accomplishment Instructions of Fokker Services SBF100-53-107 (dated 26 February 2008) or a later EASA-approved revision, and complete the work within the stated timeframe. Below are stepwise actions grounded in the text to convert the AD into operational compliance.

1. Confirm applicability to your airframe(s):

   • Check whether your aircraft is Model F.28 Mk.0100 or Mk.0070 (see “Applicability”). The AD applies to all serial numbers of those models, so any such airframe is in scope.

2. Obtain the specified service bulletin:

   • Secure Fokker Services SBF100-53-107 dated 26 February 2008. If a later revision exists, confirm whether it is EASA approved; the AD allows substitution only if that later revision carries EASA approval (see “Requirement”).

3. Read the Accomplishment Instructions:

   • The AD requires inspection of the aerodynamic seal of the wing-to-fuselage fairings and the fuselage skin, and application of an improved fillet seal per the SBF’s Accomplishment Instructions (see “Requirement”). The SBF will contain the technical steps, parts, materials, inspection acceptance criteria, tooling, and any limitations on operations during the work.

4. Plan and schedule the work within the compliance window:

   • The AD became effective on 3 July 2008 and requires completion “Within 12 calendar months after 3 July 2008” (see “Compliance”). Schedule the inspection and sealing work so it is finished before the compliance deadline.

5. Allocate competent maintenance resource:

   • Arrange for maintenance personnel or an organisation authorised to perform the SBF work to carry out the inspection and fillet seal application in accordance with the Accomplishment Instructions. The AD references manufacturer instructions as the compliance mechanism; the operator should ensure the chosen maintenance provider understands and will follow the SBF.

6. Perform the one-time inspection and sealing:

   • Execute the inspection of the aerodynamic seal and fuselage skin and apply the fillet seal as prescribed. The AD states the amendment mandates “an additional one-time inspection and application of improved sealing” (see “Background”); follow the SBF for the exact sequence and acceptance criteria.

7. Verify EASA approval if using a later SBF revision:

   • If you intend to use a SBF revision later than 26 February 2008, confirm in writing that the later revision has EASA approval, consistent with the AD’s condition (see “Requirement”).

8. Record completion and keep evidence:

   • While the AD text does not prescribe record-keeping steps, best practice grounded in the AD’s mandatory nature is to document the inspection findings, parts used, the SBF revision applied, sign-off details, and completion date. This documentation will be necessary to demonstrate compliance if queried by the regulator.

9. Consider operational implications:

   • Plan aircraft downtime, parts procurement, and scheduling so the work does not unduly disrupt operations within the compliance window. The AD does not provide operational relief or temporary measures pending compliance, so ensure the work is done within the window.

10. Note related authority and cross-reference:

    • The AD notes “EASA AD 2008-0079 refers” (see “Requirement: Note”). Consider reviewing that EASA AD and any companion guidance, and ensure your compliance aligns with any cross-jurisdictional expectations embodied in that EASA directive.

In short, compliance requires: (i) confirming applicability; (ii) obtaining and following the named SBF (or an EASA-approved later revision); (iii) performing the inspection and fillet seal application; and (iv) completing the work within 12 calendar months after 3 July 2008. The AD itself provides the requirement and the deadline but defers the technical detail and inspection criteria to the referenced Fokker Services SBF, so strict adherence to the SBF and verification of any later revisions’ EASA approval are essential compliance steps.