AD/F2000/26 - Engine Fire Detection Units

Applicability. The Directive applies narrowly to Dassault Falcon 2000EX aeroplanes, serial number 06 and serial numbers 28 through 107 inclusive, but expressly excludes aircraft already modified by modification M2958. This is a restrictive, serial-numbered applicability clause. The exact text under "Applicability" is: "Falcon 2000EX aeroplanes, serial number 06 and 28 to 107 inclusive, without modification M2958."

Mandated equipment change. The core operational requirement is to remove fire monitoring units P/N 6342-01 and replace them with P/N 6342-02 units. The document sets the replacement parts by part number and identifies the method of compliance as the Dassault Aviation Service Bulletin F2000EX-138 or later revision approved by EASA. The Directive therefore prescribes both the physical article to be installed and the procedural source that dictates the installation steps.

Timeframe. The compliance timeframe is explicit: "Within the next 12 months after the effective date of this Directive." The effective date is provided as 5 July 2007. Thus the AD sets a firm one-year compliance window tied to a specific calendar effective date rather than, for example, flight-hour or cycle thresholds.

Regulatory cross-reference. The AD cross-references EASA AD 2007-0119 and the Dassault service bulletin. It also records that AD/F2000/22 was an interim measure and "will be cancelled." The text therefore positions AD/F2000/26 as a supplanting Directive that replaces the prior interim action with a mandatory modification.

Safety rationale. The Background contains the safety rationale: a detected in-service CAS message exposed a design or tolerance weakness whereby a single-loop failure among the two fire detector loops per engine might not be detected by the existing monitoring units. The AD states the new units are of an "improved design" and "each one of them is capable of monitoring the integrity of both detectors on the associated engine."

Approval condition. Compliance requires adherence to a service bulletin "or later revision approved by the European Aviation Safety Agency (EASA)". This imposes an approval gate: only EASA-approved revisions of the Dassault SB satisfy the AD requirement.

Administrative facts. The Directive bears administrative markings: AD/F2000/26, date 7/2007, signed by Charles Lenarcic as Delegate of the Civil Aviation Safety Authority, and shows the effective date and the issuance context (it replaces an interim AD).

Aircraft operators and owners. The Directive is addressed operationally at owners and operators of Falcon 2000EX aeroplanes within the serial-number range specified and not modified by M2958. Those parties must ensure the physical replacement of P/N 6342-01 units with P/N 6342-02 units within the 12-month compliance period. The AD’s Requirement,"Remove the two fire monitoring units part number (P/N) 6342-01 and replace them with P/N 6342-02 units in accordance with Dassault Aviation Service Bulletin (SB) F2000EX-138 or later revision approved by the European Aviation Safety Agency (EASA)",places an operational obligation on the entity responsible for aircraft maintenance and airworthiness.

Maintenance organisations and technicians. Maintenance organisations that perform the replacement must follow the Dassault service bulletin and any steps and inspections it prescribes. The AD conditions compliance on using the SB "or later revision approved by the European Aviation Safety Agency (EASA)." Therefore, the maintenance organisation must obtain and apply the EASA-approved SB revision specified by the AD.

Parts suppliers and manufacturers. The requirement to replace P/N 6342-01 with P/N 6342-02 creates demand for the P/N 6342-02 units. Dassault, authorised parts distributors and suppliers of those specific part numbers will be affected by procurement and supply logistics. Operators dependent on parts availability will be affected by lead times, although the AD does not address supply arrangements.

Regulators and certification bodies. The AD references EASA approval of the service bulletin and cross-refers to EASA AD 2007-0119. The Civil Aviation Safety Authority (CASA) issued AD/F2000/26 and indicates cancellation of the previous interim AD/F2000/22. CASA and EASA thus occupy coordination roles: CASA enforces the Australian AD; EASA’s approved SB revisions and AD are referenced as the technical approval instruments.

Excluded parties. Aircraft already modified by modification M2958 are explicitly excluded from applicability and therefore not required by this AD to undertake the P/N swap. The Directive does not describe modification M2958; it is simply an exclusion criterion.

Operational planners and flight departments. The 12-month compliance window will affect maintenance scheduling, aircraft availability and operational plans for affected aircraft. Those planning maintenance must integrate the replacement into planned downtime within the compliance window.

Legal and compliance teams. Entities responsible for regulatory compliance must track the effective date (5 July 2007) and the 12-month compliance obligation, ensure documentation of compliance with the AD and the EASA-approved SB, and account for cancellation of the interim AD/F2000/22.

Primary duty: replace specified parts. The Directive’s express duty is to "Remove the two fire monitoring units part number (P/N) 6342-01 and replace them with P/N 6342-02 units in accordance with Dassault Aviation Service Bulletin (SB) F2000EX-138 or later revision approved by the European Aviation Safety Agency (EASA)." That single sentence contains the operative obligations: removal, replacement, specific part numbers and adherence to a named service bulletin as approved by EASA.

Time-bound compliance duty. The duty is time-limited: compliance must occur "Within the next 12 months after the effective date of this Directive." The effective date is stated as 5 July 2007, so the duty is temporally bounded and not conditional on flight hours or calendar-year operations.

Duty to follow an approved method. The AD conditions the replacement on following Dassault SB F2000EX-138 or a later revision "approved by the European Aviation Safety Agency (EASA)". That imposes a procedural duty to obtain and apply an EASA-approved revision of the SB; unapproved or manufacturer-only revisions are not acceptable under the AD text.

Duty scope limited by serial number and modification status. Duty applies only to aircraft "serial number 06 and 28 to 107 inclusive, without modification M2958." Aircraft outside that serial-number range, and those with modification M2958, are not subject to the replacement duty under this AD.

No explicit rights or remedies set out. The Directive text does not enumerate rights, waivers, exemptions, alternative means of compliance, or mechanisms for seeking relief from the AD requirement. It does not specify a process for approval of alternative methods of compliance in the text provided. The only approval condition stated is that the service bulletin revision must be approved by EASA.

Interrelationship with prior interim duty. The Background states AD/F2000/22 was "initially issued, as an interim measure, to ensure fire detection system integrity by a one time inspection and will be cancelled." That indicates the prior duty under AD/F2000/22 (a one-time inspection) is intended to be superseded by the present installation duty. The text therefore creates an obligation to perform the mandated replacement instead of continuing under the interim inspection measure.

No penalties or enforcement process in the text. There is no clause in the provided Directive specifying penalties, enforcement steps, or administrative processes for non-compliance. The duty exists clearly, but the AD text itself does not state the legal consequences of failing to comply.

Documentation implied but not stated. The AD requires an installation "in accordance with" an SB, which in practice will generate maintenance paperwork and records. However the Directive does not itself detail record-keeping obligations, except by virtue of the procedural requirement to follow the SB.

No penalties or enforcement procedures are specified in the Directive text supplied. The document sets out the safety requirement, the parts and the compliance period, but it does not include any explicit penalty clauses, civil or criminal sanctions, administrative enforcement steps, or a mechanism for CASA to issue fines or grounds for grounding an aircraft in the text presented. The AD does not state how compliance will be certified, inspected, audited or enforced, nor does it describe consequences for non-compliance.

Enforcement implications that are present only by omission. Because the AD does not specify enforcement within its text, the Directive leaves enforcement and penalty mechanisms outside the document’s explicit terms. The AD does indicate CASA involvement,signed by "Charles Lenarcic, Delegate of the Civil Aviation Safety Authority",and therefore the regulatory and enforcement context will exist within CASA’s broader statutory powers, but the AD as supplied does not identify which CASA powers, processes or sanctions apply, nor does it set out administrative steps such as notification of compliance, inspections or approval of alternative actions.

Reference to EASA approvals. The requirement that the work be done "in accordance with Dassault Aviation Service Bulletin (SB) F2000EX-138 or later revision approved by the European Aviation Safety Agency (EASA)" embeds an external certification gate. Failure to use an EASA-approved SB revision would mean the mandatory method of compliance has not been followed. The AD text does not say whether an alternative method could be authorised by CASA, or which authority may approve an alternative, only that the SB or its EASA‑approved revision is the prescribed method.

Interim AD cancellation. The AD records that AD/F2000/22 "was initially issued, as an interim measure, to ensure fire detection system integrity by a one time inspection and will be cancelled." The cancellation of the interim AD may have administrative enforcement consequences, in that the prior inspection requirement is to be replaced by the present mandatory change, but the AD text does not set out mechanics of that cancellation or any transitional enforcement steps.

Practical consequence for operators. Although no penalties are stated, the AD imposes a strict compliance timeline (12 months from effective date 5 July 2007) and a specific technical requirement. In practice, failure to comply with an applicable AD typically exposes an aircraft to regulatory non-conformity, but the Directive does not itself state enforcement or remedial steps; any enforcement action would derive from CASA’s broader regulatory remit and is not described in this AD.

Cross-reference to EASA instruments. The Directive explicitly refers to and depends on certain EASA instruments. It requires compliance "in accordance with Dassault Aviation Service Bulletin (SB) F2000EX-138 or later revision approved by the European Aviation Safety Agency (EASA)." It also contains the note "EASA AD 2007-0119 refers." Thus this Australian AD incorporates EASA’s technical approvals by reference and relies on EASA‑approved documentation as the proper method of compliance.

Superseding an interim Australian AD. The Background states AD/F2000/22 "was initially issued, as an interim measure, to ensure fire detection system integrity by a one time inspection and will be cancelled." Therefore AD/F2000/26 is positioned to replace or supplant AD/F2000/22. The text creates a temporal interaction between Australian ADs, where the interim inspection requirement under the earlier AD is to be cancelled once the mandated modification is in place.

No mention of interaction with broader Australian aviation legislation. The document does not cite specific Australian statutes, CASA regulatory instruments, or parts of the Civil Aviation Regulations. The AD is administrative in form and does not set out how it interacts with, amends, or is enforced under particular sections of Australian aviation law. It does not specify appeal rights under CASA instruments, nor does it assert which CASA regulatory powers are being exercised.

No interaction with international trade, customs or import/export law described. The AD requires installation of a particular part number produced by Dassault or an authorised supplier, but the text contains no provisions about importation, tariffs, or international supply chain measures.

No statement on alternative methods of compliance under Australian or EASA rules. The AD requires the EASA-approved service bulletin or later EASA-approved revision, and does not set out an explicit process for CASA to accept alternative methods of compliance. Nor does it reference the mechanism by which an operator might seek an alternative means of compliance, exemptions, or extensions.

Administrative effect on prior obligations. By cancelling AD/F2000/22, the Directive alters the set of active Australian AD obligations applicable to the specified aircraft. Any obligations or inspections required under AD/F2000/22 were intended to be temporary until the mandated installation required by AD/F2000/26 was completed.

AD number and date. The Directive is recorded as AD/F2000/26, dated 7/2007, and becomes effective on 5 July 2007. The cover indicates the publication date context as "7/2007". The text also contains the signature and date "7 May 2007" under the Delegate’s name, which is an administrative timestamp related to the issuing of the document.

Cancellation of interim AD. The Directive text explicitly states that AD/F2000/22 "was initially issued, as an interim measure, to ensure fire detection system integrity by a one time inspection and will be cancelled." That is the only amendment or cancellation recorded in the document. The record therefore supports a single change in the AD landscape for these aircraft: AD/F2000/26 replaces the interim inspection AD/F2000/22.

Service bulletin approval condition. The Requirement ties compliance to "Dassault Aviation Service Bulletin (SB) F2000EX-138 or later revision approved by the European Aviation Safety Agency (EASA)." This creates a mechanism for amendment of the installation procedure: later revisions of the SB will be acceptable provided they are EASA-approved. The AD therefore allows technical amendment via subsequent EASA-approved revisions of the identified Dassault SB without the need to reissue the AD, but only to the extent the revision receives EASA approval.

No further amendments recorded. The supplied text contains no later amendments, no recorded revocations, no extensions of the compliance timeline, and no formal provisions for variation, deferral or alternative compliance processes. The AD itself does not contain standard "variations" or "AMOC" (alternative method of compliance) clauses. The only amendment-related mechanism expressly provided is acceptance of later EASA-approved SB revisions.

Repetitions and formatting. The document has multiple repeated headings and the AD number printed several times; this appears to be administrative duplication rather than substantive amendment. The duplication does not change the operative requirements.

No effective-dates-of-amendments schedule. The AD sets an effective date and a single compliance window. It does not provide interim compliance milestones, staged compliance, or staged roll-out mechanisms beyond the one-year window.

The Directive text contains no litigation history. There are no references to judicial or tribunal proceedings, no mention of disputes about the AD’s validity, and no citation to any case law or appeals. The document does not record any challenges to the content, nor does it note any administrative review or adjudication in respect of the AD.

No recorded disputes over parts, approvals, or applicability. The AD does not document any disagreements regarding serial-number scope, the exclusion for modification M2958, or the acceptability of the service bulletin. It does not state that any party sought review of the Directive or that CASA took any additional remedial steps as a result of litigation.

No precedent cited. The AD contains a citation to EASA AD 2007-0119, but that is a regulatory instrument rather than litigation. The Background references an in-service CAS message and EASA investigations as the factual basis for the AD, but there is no mention of legal challenges or case outcomes.

Implications for practitioners. Because no litigation history is recorded in the AD text, practitioners seeking litigation-related guidance from this document will find none here. Any legal disputes about enforcement, interpretation of serial-number applicability, or the permissibility of alternative compliance measures would have to be researched outside this AD, as the AD does not include or summarise such matters.

Narrow applicability, serial-number specificity. The AD applies to "serial number 06 and 28 to 107 inclusive, without modification M2958." Operators and maintenance planners must verify their aircraft’s serial number and modification status; an aircraft outside that precise serial-number range, or one that has been modified by M2958, is not captured by this AD. Missing this check could lead to unnecessary work or failure to act where required.

Exclusion by modification M2958. The exclusion for aircraft "with modification M2958" is absolute in the text. The AD does not define or describe M2958. Operators must confirm whether modification M2958 has been incorporated. The AD does not explain whether incorporation of M2958 already effects the same change, or whether it addresses the same failure mode; it only excludes such aircraft from the replacement obligation.

Dependence on EASA-approved SB revision. The AD requires the work to be done "in accordance with Dassault Aviation Service Bulletin (SB) F2000EX-138 or later revision approved by the European Aviation Safety Agency (EASA)." Using a Dassault SB revision that lacks EASA approval, or deviating from the SB without documented EASA approval, would not meet the AD’s stated method of compliance. The AD does not state whether CASA can approve alternative procedures, or how an operator might apply for alternative means of compliance.

Part numbers must be exact. The requirement names the parts exactly: remove P/N 6342-01 and install P/N 6342-02. The AD does not allow substitution of parts by description; the textual specification is to these part numbers. Procuring the correct P/N and ensuring correct installation is therefore essential.

Time-limited compliance from a fixed effective date. The compliance clock runs "Within the next 12 months after the effective date of this Directive." The effective date is given as 5 July 2007. The AD does not provide extensions or phased compliance options; no relief mechanism is described in the text supplied.

Cancellation of interim inspection AD. The Background notes that AD/F2000/22 "will be cancelled." Operators who complied with AD/F2000/22’s interim one-time inspection should note that compliance under that interim AD was intended as temporary and is to be superseded by this installation requirement. The AD does not specify transition paperwork or how prior inspection records interact with the new requirement.

No penalties stated. The AD contains no explicit penalties or enforcement provisions. Absence of stated penalties is a potential practical "gotcha" for those expecting the AD to set out enforcement steps; actual regulatory consequences would be located in CASA’s broader regulatory framework, not in the AD.

Assumption of parts availability and maintenance resources. The AD mandates replacement for a cluster of serial-numbered aircraft within one year. The AD does not discuss parts supply, lead times, or maintenance man-hour estimates. Operators must plan for parts procurement and scheduling; the AD’s silence on supply chains is an operational risk and scheduling consideration.

Reliance on EASA investigations and approvals. The Background references EASA investigations and the EASA AD. The AD therefore presumes coordination with EASA findings and approvals. Where operators are outside EASA jurisdiction or where EASA-approved SB revisions are delayed, the AD does not set out a fallback.

No documentation requirements stated. The AD requires work "in accordance with" a service bulletin but does not itself require operators to file proof of compliance with CASA in the AD text. Usual airworthiness record-keeping practice would require documentation, but the AD does not specify documentation formats or submission processes.

Step 1 , confirm applicability. Verify the aircraft serial number. The Directive applies to "Falcon 2000EX aeroplanes, serial number 06 and 28 to 107 inclusive, without modification M2958." If the aircraft is outside these serial numbers, or has modification M2958 incorporated, the AD’s replacement requirement does not apply.

Step 2 , confirm effective date and deadline. The Directive becomes effective on 5 July 2007 and requires compliance "Within the next 12 months after the effective date of this Directive." This sets a compliance deadline of 5 July 2008 for affected aircraft.

Step 3 , obtain the specified service bulletin with appropriate approval. The AD requires carrying out the replacement "in accordance with Dassault Aviation Service Bulletin (SB) F2000EX-138 or later revision approved by the European Aviation Safety Agency (EASA)." Obtain SB F2000EX-138 or any later revision, and confirm that the revision is approved by EASA. Do not proceed using an SB revision that lacks EASA approval, as the AD conditions compliance on that approval.

Step 4 , procure correct parts. The Requirement specifies removal of P/N 6342-01 units and installation of P/N 6342-02 units. Procure P/N 6342-02 fire monitoring units and ensure they are authentic and suitable for the Falcon 2000EX airframe and engines identified in the SB. The AD does not provide alternatives or substitute part numbers.

Step 5 , schedule maintenance within the compliance window. Plan for maintenance access and downtime to perform removal and replacement of the two fire monitoring units on each affected aircraft, and schedule the work to be completed no later than the 12-month deadline.

Step 6 , execute replacement per the EASA-approved SB. Carry out the removal and installation strictly according to the procedures, inspections and tests set out in the EASA-approved SB revision. Follow any torque, wiring, rigging, sealing, testing or airworthiness verification steps in that SB.

Step 7 , test and verify system integrity. The Background describes the safety issue as inability to detect a failed single-loop detector; the SB is the document that will contain the required functional checks. Perform the tests required by the SB to verify each new monitoring unit "is capable of monitoring the integrity of both detectors on the associated engine," as the AD requires.

Step 8 , document compliance. Although the AD text does not specify documentary filing with CASA, operators should create maintenance records showing the parts removed and installed (P/Ns 6342-01 removed, P/Ns 6342-02 installed), the SB revision used (EASA approval reference), dates of work and the technician/organisation that performed the work. This preserves evidence of compliance in case regulatory review is later required.

Step 9 , consider supply chain and scheduling contingencies. Because the AD imposes a one-year window starting from a fixed effective date, if P/N 6342-02 parts are not immediately available, operators must plan procurement early to avoid deadline pressure. The AD does not provide relief for parts shortages.

Step 10 , note prior inspection AD status. If the operator performed the interim "one time inspection" under AD/F2000/22, record that such inspection was interim and will be superseded by this mandated replacement. Ensure any documentation from AD/F2000/22 is retained as part of the aircraft’s maintenance history.

Step 11 , seek clarification where necessary. The AD requires an EASA-approved SB revision but does not specify alternative means of compliance or CASA approval processes in the text supplied. If an operator believes an alternative method is necessary, or if EASA approval status is uncertain, seek clarification from the regulator or an authorised representative. The AD itself does not set out an alternative-method procedure or an appeal process in the provided text.

Following these steps will align the operator’s actions with the explicit requirements of AD/F2000/26: removal of P/N 6342-01 units and installation of P/N 6342-02 units for the specified Falcon 2000EX serial numbers, using the Dassault SB F2000EX-138 or an EASA-approved later revision, within 12 months of the effective date.