AD/PA-46/35 - Current Limiters

The Directive is structured around four main concepts: applicability, temporary operational limitation, inspection and corrective action, and cross-recognition of FAA-approved alternate compliance.

Applicability is narrowly defined by model and exact serial number ranges. The Directive lists two model types with two contiguous serial number blocks: PA-46-350P 4636375-4636447, and PA-46R-350T 4692001-4692068. That specificity confines the Directive to a finite population of aeroplanes.

The temporary operational limitation is a mandatory AFM amendment requiring operation only under Day Visual Flight Rules. The text states that the AFM amendment may be effected by inserting a copy of the Directive into the AFM, and that the amendment may be removed once the current limiters have been verified in the proper locations or reinstalled correctly. The Directive therefore creates a conditional, temporary restriction on flight operations until the technical verification is complete.

Inspection and corrective action form the technical core. Requirement 2 mandates inspection of two current limiters, a 35-amp and a 250-amp unit, for correct installation, utilising the procedural detail contained in Piper Service Bulletin 2000 dated 16 September 2008. Requirement 3 mandates reinstallation in accordance with the same service bulletin where the inspection reveals incorrect installation. The Directive ties the AFM limitation removal to completion of these tasks.

The Directive also contains a mechanism for cross-recognition: later revisions of SB 2000 that have been approved by the United States Federal Aviation Administration as an Alternate Method of Compliance to FAA AD 2009-07-08 are expressly accepted for compliance with the equivalent Requirements of this Directive. The Directive also references FAA AD 2009-07-08, which it identifies in a Note.

Operationally relevant mechanics follow: the AFM amendment may be carried out by the owner/operator if they hold at least a private pilot licence; the AFM amendment is mandatory before further flight after 5 May 2009; the inspection window is within 100 hours time in service after 5 May 2009; and any necessary reinstallation must be completed before further flight following the inspection. The Directive’s appliance of a self-contained inspection and correction procedure, coupled with an explicit temporary operating limitation, defines a sequence of compliance actions that move affected aeroplanes from a restricted-operational state to unrestricted status only on verification or correction of the specific hardware installation.

The Directive directly affects owners and operators of the specified Piper PA-46 models within the listed serial number ranges. The two ranges are PA-46-350P serials 4636375 through 4636447, and PA-46R-350T serials 4692001 through 4692068. Any person responsible for the continued airworthiness or operation of those aeroplanes must follow the Directive.

The Directive allocates certain responsibilities to the aircraft owner/operator. It expressly permits the AFM amendment mandated by Requirement 1 to be carried out by the aircraft owner/operator, provided that they hold at least a private pilot licence. That clause identifies a class of private individuals who may lawfully effect the administrative AFM change without separate maintenance organisation involvement. The Directive does not state that inspections or reinstallations are restricted to licensed maintenance engineers; it requires inspections "by following the procedures in Piper Aircraft, Inc. Service Bulletin (SB) 2000 dated 16 September 2008" and requires reinstallation in accordance with SB 2000 where necessary. The source text does not prescribe the qualification of the person performing the inspection or reinstallation beyond the owner/operator allowance for the AFM amendment, so the Directive's operative requirements are agnostic in wording as to who must physically perform the inspection and corrective work, beyond adherence to SB 2000 procedures.

Aircraft operators who plan to continue flying affected aeroplanes must operate only under Day VFR until verification and correction steps are completed. This operational constraint directly affects any pilots intending to fly the specific aeroplanes between the effective date and completion of the inspection/correction process. The compliance timing imposes a near-term administrative action (AFM insertion before further flight after 5 May 2009) and a technical inspection window (within 100 hours time in service after 5 May 2009). The Directive further affects maintenance programmes because any non-conforming current limiter installation must be corrected in accordance with SB 2000 before flight continues.

Finally, manufacturers and service providers are implicated indirectly. Piper Aircraft’s Service Bulletin 2000 is the specified procedural document. The Directive permits later revisions of SB 2000 that have FAA AMOC approval to be used as an acceptable method of compliance, creating a pathway for manufacturers or service bulletin authors to provide updated procedures that, if accepted by the FAA as AMOCs to FAA AD 2009-07-08, will be accepted by CASA for compliance with the Directive. The Directive therefore creates an interaction point for international regulatory approvals and supplier-driven procedural updates.

The Directive creates a tight set of duties on specified aeroplane owners/operators and imposes specific operational constraints until verification or correction occurs.

Primary duties:

• Amend the AFM Limitations Section to insert the statement "Operate Only under Day Visual Flight Rules (VFR)" as Requirement 1. The Directive states this may be accomplished by inserting a copy of the Directive into the AFM.
• Inspect the 35-amp and 250-amp current limiters for installation in the proper location by following the procedures in Piper SB 2000 dated 16 September 2008, as Requirement 2.
• If any current limiter is not in the proper location as discovered in Requirement 2, reinstall the current limiter in the proper location in accordance with the procedures in SB 2000, as Requirement 3.

Timing duties:

• Requirement 1 must be completed before further flight after 5 May 2009.
• Requirement 2 must be completed within 100 hours time in service after 5 May 2009.
• Requirement 3 corrective action must be completed before further flight after the Requirement 2 inspection is accomplished.

Rights and procedural points explicitly stated in the Directive:

• The AFM amendment may be carried out by the aircraft owner/operator provided they hold at least a private pilot licence. That is a specified permission in the text.
• The AFM amendment may be removed when verification shows the current limiters are in the proper locations (Requirement 2) or when the current limiters have been reinstalled in the proper locations (Requirement 3). This creates a procedural right to restore the AFM to its previous state once the technical condition is satisfied.
• Later revisions of SB 2000 that hold FAA approval as an Alternate Method of Compliance to FAA AD 2009-07-08 are considered acceptable for compliance with the equivalent Requirements of this Directive. That clause confers a right to use alternative, FAA-approved procedures for compliance where such FAA approval exists.

Specifically absent from the Directive are any express statements about record-keeping requirements, mandatory qualifications for the inspector or installer beyond the allowance for owner/operator AFM amendment, or stated penalties for non-compliance. The Directive’s duties are procedural and temporal: AFM insertion, inspection per SB 2000, and reinstallation if necessary. The operational limitation is the immediate effect on flight authorisation, imposing a constraint on how affected aeroplanes may be lawfully operated until the inspections and corrections are addressed in line with the Directive.

The Directive itself specifies compliance actions and timing, but it does not articulate statutory penalties or enforcement procedures within the text provided. The document sets compliance deadlines and prescribes mandatory actions: AFM amendment before further flight after 5 May 2009, inspection within 100 hours time in service, and reinstallation before further flight where required. The Directive is effective as of 5 May 2009, which fixes the operative timeline.

Because the Directive mandates an operating limitation, "Operate Only under Day Visual Flight Rules (VFR)," until verification or correction, the immediate enforcement mechanism embedded in the instrument is an operational constraint that affects flight planning and allowable operations. The Directive ties removal of that limitation to the successful completion of the inspection and, if necessary, reinstallation. The document therefore establishes a condition precedent for returning to unrestricted operations: verification that the current limiters are in proper locations or that they have been reinstalled correctly.

The Directive refers to FAA AD 2009-07-08 in a Note and accepts FAA-approved AMOCs to SB 2000 as acceptable methods of compliance. That cross-reference creates an implied enforcement connection to the FAA’s actions on the related airworthiness issue. However the Directive text supplied does not identify who enforces these directives, what administrative or civil penalties apply for non-compliance, or what processes apply for oversight, audits, or grounding. It likewise does not set out any reporting or record-keeping obligations that would create documentary evidence for enforcement.

Practically, the Directive sets clear performance requirements and deadlines. Enforcement in aviation systems ordinarily follows from the regulator's statutory enforcement tools, operational approvals, and continuing airworthiness oversight, but those instruments and penalties are not specified in this text. Users of the Directive should accordingly treat the stated duties and times as mandatory obligations arising from the Directive and assume that continued operation contrary to the AFM limitation would be inconsistent with the Directive’s requirements. The Directive itself, however, provides no express sanction schedule or penalty clauses in the source material.

The Directive explicitly references and interacts with a related FAA airworthiness directive and with a manufacturer service bulletin, creating cross-jurisdictional and technical interdependencies. The Note in the Directive refers to "FAA AD 2009-07-08 Amdt 39 15867," signposting a related United States regulatory action. Further, the Directive states that "Later revisions of the above SB, approved by the United States Federal Aviation Administration (FAA) as an Alternate Method of Compliance (AMOC) to FAA AD 2009-07-08, are considered acceptable for compliance with the equivalent Requirements of this Directive." That provision creates an acceptance mechanism whereby FAA approval of SB 2000 revisions as AMOCs converts those revisions into acceptable compliance methods under this Directive.

The Directive requires compliance with procedures in Piper Aircraft, Inc. Service Bulletin 2000 dated 16 September 2008. That makes the Service Bulletin an operative technical standard for inspection and reinstallation. Where later revisions of the Service Bulletin receive FAA AMOC status relative to FAA AD 2009-07-08, those revisions are acknowledged by this Directive as valid alternatives for compliance. The Directive therefore links domestic regulatory obligations to external approvals, allowing internationally accepted procedural updates to be used without separate amendment of the Directive itself.

The document does not spell out interactions with other Australian aviation instruments, such as continuing airworthiness regulations, maintenance licensing rules, or enforcement statutes. It also does not reference record-keeping, maintenance release or certification rules. Consequently the Directive stands as a focused operational and technical requirement; any broader legal or regulatory obligations that typically attach to maintenance actions, AFM amendments, or airworthiness directives are not reproduced in the text. Practitioners should note that the Directive’s operational limitation and technical tasks will often need to be carried out in the context of other regulatory regimes governing maintenance certification, logbook entries, and continued airworthiness, but those regimes are not described in this document.

The Directive authorises the owner/operator to make the AFM amendment if they hold at least a private pilot licence. That interacts with administrative practice concerning who may lawfully alter AFM documentation. The Directive does not elaborate how such administrative AFM amendments interact with formal AFM approval processes, or whether an AFM amendment effected by the owner/operator requires any subsequent endorsement. The Directive simply states the permissive allowance.

In sum, the Directive explicitly cross-references FAA AD 2009-07-08 and Piper SB 2000, and recognises FAA-approved AMOCs as acceptable methods of compliance. It does not, within the supplied text, set out interactions with other named Australian statutory instruments, nor does it provide detailed integration instructions with national maintenance licensing or record-keeping requirements.

The Directive record supplied contains limited amendment history information. The document is dated 17 April 2009, with an effective date of 5 May 2009. It is headed "AD/PA-46/35 Current Limiters 6/2009 DM" and bears the signature of James Coyne, Delegate of the Civil Aviation Safety Authority. The "6/2009 DM" marking suggests an internal designation for April/May 2009 issuances, but the text of the supplied Directive does not include prior versions or a chain of amendments.

The Directive does include an internal mechanism that recognises later revisions of Piper SB 2000 provided they are approved by the FAA as Alternate Methods of Compliance to FAA AD 2009-07-08. That clause functions as a limited and conditional amendment pathway for the technical procedures required by the Directive: if Piper issues a revised SB 2000 and the FAA approves that revision as an AMOC to FAA AD 2009-07-08, the CASA Directive accepts that updated SB as acceptable for compliance. The document thereby delegates some evolving technical detail to a different authority, the FAA, for the purposes of accepting procedural updates.

There is no record in the supplied text of any subsequent CASA amendments to this Directive, rescissions, supersessions, or changes to applicability. The Directive states that the AFM amendment may be removed once verification or corrective reinstallation is complete; that is a change in the status of a particular aircraft’s documentation rather than an amendment to the Directive itself. The Directive also cross-references FAA AD 2009-07-08, but does not state whether and how any later FAA amendments to that AD would automatically affect this Directive.

Practitioners seeking a fuller amendment history will need to consult the issuing authority’s registry or subsequent directives, as the supplied text contains only the initial issuance date, effective date, and the authorising signature. The single explicit modification pathway in the text is limited to acceptance of FAA-approved SB revisions as AMOCs, which allows procedural updates to be incorporated without formal amendment of the CASA Directive by reference.

The supplied Directive contains no litigation history. It does not reference any court decisions, enforcement actions, disputes, or legal challenges related to its issuance, interpretation, scope, or compliance. There are no listed cases, no mention of contested enforcement, and no record of judicial review included in this document.

Given the absence of litigation material in the text, there are no source-supported claims that can be made about legal challenges, precedent, or judicial interpretation arising from this Directive. The Directive’s content is limited to technical and procedural requirements, applicability, and compliance timing. Any litigation history, if it exists, would need to be located in external records, court filings, or public law reports; such material is not part of the supplied source and cannot be summarised here.

Users requiring information about disputes, enforcement actions, or legal interpretations should consult the relevant court databases, regulator enforcement records, or legal reporting services. The Directive itself does, however, make factual cross-references to FAA AD 2009-07-08 and to Piper SB 2000; any litigation arising from those documents would not be reflected in this text unless specifically incorporated.

The Directive contains several precise details and conditional allowances that can create compliance pitfalls if overlooked. These are facts from the text that can trip up owners, operators, and maintenance personnel.

1. Exact serial-number applicability. The Directive applies only to PA-46-350P serials 4636375 through 4636447 and PA-46R-350T serials 4692001 through 4692068. Aircraft outside those serial ranges are not covered by the Directive as written. Misidentifying an aeroplane’s serial number could result in unnecessary action or failure to comply if the aircraft is within the listed range.

2. AFM amendment timing and temporary status. Requirement 1 must be satisfied "Before further flight after 5 May 2009." That is an immediate administrative barrier to flight. The AFM amendment may be removed only after the current limiters have been verified in the proper locations or reinstalled correctly. Do not assume the AFM insertion is a permanent modification; it is a temporary operating limitation that must remain in place until verification or correction occurs.

3. Owner/operator permission for AFM amendment is limited. The Directive expressly permits the aircraft owner/operator to carry out the AFM amendment only if they hold at least a private pilot licence. That allowance does not extend to other tasks. The Directive does not expressly permit the owner/operator to perform the inspection or reinstallation unless those persons also satisfy the procedural or licensing requirements of SB 2000, which are not reproduced in the Directive.

4. Inspection procedure dependency. Requirement 2 and Requirement 3 are to be executed "by following the procedures in Piper Aircraft, Inc. Service Bulletin (SB) 2000 dated 16 September 2008." Obtaining and using the exact SB revision is necessary. The Directive allows later SB revisions only if the FAA has approved them as AMOCs to FAA AD 2009-07-08. Therefore, relying on an unapproved SB revision could produce non-compliance.

5. Compliance windows differ by requirement. Requirement 1 is immediate before further flight after 5 May 2009, Requirement 2 has a window of 100 hours time in service after 5 May 2009, and Requirement 3 must be done before further flight if a problem is found at inspection. Mixing those timing requirements up could produce gaps in compliance.

6. Removal of AFM amendment conditional on verification. The AFM entry may be removed only after verification or successful reinstallation. Operators must not delete the AFM limitation merely because they expect to have corrected the issue, actual verification is required.

7. Cross-jurisdictional acceptance. The Directive accepts FAA-approved AMOCs to FAA AD 2009-07-08 for later SB revisions. That means that until such FAA approval exists, later SB revisions are not automatically acceptable under this Directive. Users should obtain written evidence of FAA AMOC approval before relying on a SB revision not explicitly dated 16 September 2008.

8. Lack of specified enforcement detail. The Directive does not state penalties or enforcement mechanisms in the text provided. The absence of explicit enforcement language does not remove the obligation to comply, but it does mean that operators must look to the regulator’s wider legal framework for enforcement consequences.

9. Ambiguity about who must perform inspections and reinstallations. The Directive does not specify mandatory qualifications for the person to perform the inspection or reinstallation, other than the AFM amendment allowance. That ambiguity can lead to differences in practice; prudent operators should ensure that personnel performing technical tasks follow SB 2000 qualification expectations and their own regulatory maintenance rules.

10. Reliance on external documents. The key technical instructions are in SB 2000 and FAA AD 2009-07-08. These are external to the Directive and must be sourced and followed. Failing to obtain or adhere to these documents could result in procedural non-compliance even where the AFM amendment has been made.

The Directive prescribes a concise sequence of steps. Below is a practical, source-grounded step plan that follows the Directive’s Requirements and timing.

1. Verify applicability. Confirm the aeroplane model and serial number. The Directive applies only to PA-46-350P serial numbers 4636375 through 4636447 and PA-46R-350T serial numbers 4692001 through 4692068. If the aeroplane is within those serial ranges, proceed.

2. Insert the AFM limitation immediately. Before further flight after 5 May 2009, amend the Limitations Section of the aircraft flight manual to insert the statement "Operate Only under Day Visual Flight Rules (VFR)." The Directive allows the amendment to be effected by inserting a copy of the Directive into the AFM. The Directive also permits the aircraft owner/operator to make that AFM amendment provided they hold at least a private pilot licence. Do not remove this limitation until verification or corrective reinstallation is complete.

3. Obtain Piper SB 2000. Acquire Piper Aircraft, Inc. Service Bulletin 2000 dated 16 September 2008, which contains the procedural steps for inspection and reinstallation. The Directive requires following the procedures in that SB for Requirements 2 and 3. If a later revision of SB 2000 is to be used, confirm that the FAA has approved that revision as an Alternate Method of Compliance to FAA AD 2009-07-08; the Directive accepts FAA-approved AMOCs as acceptable for compliance.

4. Carry out inspection within the 100-hour window. Within 100 hours time in service after 5 May 2009, inspect the 35-amp and 250-amp current limiters to verify they are installed in the proper locations, following the step-by-step procedures in SB 2000. Ensure the person performing the inspection follows the SB's procedural and safety steps.

5. If incorrect installation is found, reinstall per SB 2000 before further flight. Requirement 3 requires that any current limiter not in the proper location be reinstalled in the proper location in accordance with SB 2000. This reinstallation must be completed before further flight following the inspection that revealed the issue.

6. Verify completion and remove AFM amendment. The Directive permits removal of the AFM amendment when it has been verified that the current limiters are in the proper locations (Requirement 2) or when the current limiters have been reinstalled in the proper locations (Requirement 3). Conduct an explicit verification step and retain evidence of verification. The Directive does not specify required forms of evidence; however the Directive conditions the removal of the AFM limitation on actual verification or completed reinstallation.

7. If relying on later SB revisions, obtain FAA AMOC evidence. If you intend to use a revision of SB 2000 later than 16 September 2008, obtain written FAA approval of that revision as an AMOC to FAA AD 2009-07-08, because the Directive expressly recognises such FAA-approved AMOCs as acceptable compliance methods.

8. Maintain internal records. While the Directive does not specify record-keeping obligations within the supplied text, maintaining contemporaneous records of AFM amendment insertion, inspection findings, corrective actions, and verification will support the operator’s position that the Directive has been complied with and will document the basis for removing the AFM restriction.

9. Coordinate with other maintenance and airworthiness processes. Implement these actions in a way that conforms with the operator’s own maintenance control procedures, maintenance release practices, and any other continuing airworthiness obligations. The Directive does not displace other maintenance rules; it sets specific additional obligations.

10. Consider professional assistance where necessary. The Directive permits the AFM amendment by an owner/operator who holds at least a private pilot licence. For the technical inspection or reinstallation, ensure personnel are competent and authorised under applicable maintenance rules and follow SB 2000. If in doubt about competency or interpretation, engage appropriately qualified maintenance personnel.

Executing the sequence above in the stated order will align an affected aeroplane with the Directive’s requirements: AFM amendment before flight after 5 May 2009, inspection within 100 hours, correction before further flight where necessary, and removal of the AFM limitation only after verification or correction. The acceptance of FAA-approved AMOCs for later SB revisions provides a pathway for updated technical procedures, but reliance on any SB revision requires confirmation of FAA AMOC status as set out in the Directive.