{"id":"F2006B05909","name":"AD/PA-34/39 Amdt 1 - Ammeter Installation","slug":"ad-pa-34-39-amdt-1-ammeter-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135977,"registerId":"commonwealth-F2006B05909-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-34/39 Amdt 1 - Ammeter Installation","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nPiper PA-34 (Seneca) Series Aeroplanes\n\nAD/PA-34/39\n\nAmdt 1\n\n  \nAmmeter Installation 12/86\n\nApplicability: Model PA-34-200T with S/Nos. 34-7570001 through 34-8170092, except those aircraft fitted with ninety (90) ampere alternators.\n\nRequirement: Action in accordance with Piper Service Bulletin No. 811A. Ensure the shunt is positioned and adequately supported to prevent mechanical loads being applied to the 20 gauge wires connected to the ammeter.\n\nCompliance: Within 100 hours time in service after 31 July 1986.\n\nBackground: Reports have been received of loose and/or shorting ammeter connections at the ammeter cluster gauge. If this condition is allowed to continue without rectification the possibility exists for electrical failure or fire within the cockpit. Amendment 1 clarifies the protection requirement.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is Amendment 1 to an existing Airworthiness Directive. The amendment is explicitly described as clarifying 'the protection requirement' compared to the original AD/PA-34/39 issued in December 1986. The scope remains tightly focused on the original safety issue (ammeter wiring support) and has not expanded beyond the specific aircraft model and serial numbers originally targeted."},"complexity_factors":["Very short document (under 200 words)","Only 4 defined elements: specific aircraft model, serial number range, one exclusion (90-amp alternators), and one referenced external document (Piper Service Bulletin 811A)","Single, clear compliance action with no conditional branches or exceptions","No internal cross-references to other legislation or regulations","Simple temporal trigger for compliance (100 hours after fixed date)"],"plain_english_summary":"This is a **safety directive for specific Piper Seneca aircraft** (model PA-34-200T with serial numbers 34-7570001 through 34-8170092, excluding those with 90-amp alternators).\n\n**What it does:**\n- Requires owners/operators to follow **Piper Service Bulletin No. 811A** to fix a potentially dangerous electrical problem\n- Specifically mandates that the **shunt** (a device that measures electrical current) must be properly positioned and supported so it doesn't put physical stress on thin 20-gauge wires connected to the ammeter (the gauge that shows electrical current flow)\n\n**Why it matters:**\n- Loose or short-circuiting ammeter connections have been reported at the instrument panel\n- If not fixed, this could cause **electrical failure or cockpit fire**\n- Amendment 1 (this version) clarifies exactly what protection is needed for the wiring\n\n**Who must comply:**\n- Operators of affected Piper Seneca aircraft\n- Must complete the work **within 100 flight hours after 31 July 1986**\n\n**Bottom line:** A mandatory safety fix to prevent electrical fires in the cockpit of certain twin-engine Piper aircraft."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"Amendment 1 clarifies the protection requirement but does not expand or contract the stated applicability or the compliance deadline in the text provided. The directive continues to apply to the same model and serial number range with the same exception and prescribes compliance by following Piper Service Bulletin No. 811A (Applicability; Requirement; Compliance; Background)."},"complexity_factors":["Narrow applicability limited to a single model and a specific serial number range (Applicability)","Exception for aircraft fitted with 90 ampere alternators reduces universe of affected aircraft (Applicability)","External technical reliance on Piper Service Bulletin No. 811A for the required corrective steps (Requirement)","Technical specificity about shunt position/support and protection of 20 gauge wires (Requirement)","A single clear compliance deadline measured in time-in-service (100 hours after 31 July 1986) (Compliance)","Safety rationale and limited implementation risk are explicitly stated (Background)"],"plain_english_summary":"This directive requires owners/operators of certain Piper PA-34-200T aeroplanes (specified serials, except those with 90 A alternators) to modify the ammeter installation per Piper Service Bulletin No. 811A so the ammeter shunt is correctly positioned and supported, preventing loads on the 20‑gauge ammeter wires. Work must be done within 100 hours TIS after 31 July 1986. It matters because loose/shorting ammeter connections risk electrical failure or cockpit fire; owners bear compliance costs."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-34-39-amdt-1-ammeter-installation","history":"/api/acts/ad-pa-34-39-amdt-1-ammeter-installation/history","analysis":"/api/acts/ad-pa-34-39-amdt-1-ammeter-installation/analysis","conflicts":"/api/acts/ad-pa-34-39-amdt-1-ammeter-installation/conflicts","importantCases":"/api/acts/ad-pa-34-39-amdt-1-ammeter-installation/important-cases","documents":"/api/acts/ad-pa-34-39-amdt-1-ammeter-installation/documents"}}