{"id":"F2006B09414","name":"AD/ELECT/37 Amdt 2 - JET Electronics and Technology Inc. Standby Power Supply - Modification","slug":"ad-elect-37-amdt-2-jet-electronics-and-technology-inc-standby-power-supply-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":53787,"registerId":"commonwealth-F2006B09414-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/ELECT/37 Amdt 2 - JET Electronics and Technology Inc. Standby Power Supply - Modification","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nElectrical Equipment\n\nAD/ELECT/37\n\nAmdt 2\n\n  \n\nJET Electronics and Technology Inc. Standby Power Supply \\- Modification\n\n  \n12/85\n\nApplicability: All J.E.T. PS-823 Models.\n\nRequirement: If the modification number listed below has been marked off then no further action is required in this part.\n\n| JET Part No | Model     | Modification No |\n| ----------- | --------- | --------------- |\n| 501-1075-01 | PS-823A   | 18              |\n| 501-1975-02 | PS-823B   | 17              |\n| 501-1075-03 | PS-823C   | 15              |\n| 501-1075-04 | PS-823D   | 14              |\n| 501-1075-05 | PS-823A/T | 21              |\n| 501-1075-06 | PS-823B/T | 19              |\n| 501-1075-07 | PS-823C/T | 17              |\n| 501-1075-07 | PS-823D/T | 16              |\n\nIf the applicable modification number has not been marked off, install modifications in accordance with JET SB No. SB501-1075-16F.\n\nCompliance: Within 100 hours time in service after 28 February 1981.\n\nBackground: Part 2 of this Directive is cancelled following reassessment after discussion with manufacturer, JET, who advised of factors not available at time of issue of Amendment 1.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a narrow, technical amendment to a specific airworthiness directive. It reduces scope by cancelling Part 2 of the previous amendment based on new manufacturer information, but does not represent mission creep or expansion beyond original aviation safety purpose."},"complexity_factors":["Single, discrete technical requirement with binary compliance test (modification installed or not)","Only 8 specific part/model combinations affected","Clear cross-reference to single external document (manufacturer's Service Bulletin SB501-1075-16F)","Simple deadline calculation (100 hours time in service after fixed date)","No nested conditions, exceptions, or defined terms section","Background explanation is straightforward and aids understanding"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspection and, if needed, modification of JET Electronics PS‑823A–D (including “/T” variants) standby power units. Operators must check for the specified modification number and, if it’s absent, install the changes per Service Bulletin SB501‑1075‑16F within 100 flight hours after 28 February 1981. It’s legally binding, affects anyone with these units installed, and Amendment 2 cancels certain prior extra requirements."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Yes. The Directive withdraws a previously included Part 2 following reassessment and discussion with the manufacturer, JET, thereby narrowing the Directive from its earlier form (Background)."},"complexity_factors":["Clear, limited scope: applies only to named J.E.T. PS-823 models and part numbers (Applicability; table).","Conditional requirement: no action if the applicable modification number is already marked off; otherwise installation per a single Service Bulletin (Requirement).","Single fixed compliance window: 100 hours time in service after 28 Feb 1981 (Compliance).","Technical execution depends on following JET SB No. SB501-1075-16F (cross-reference to external technical document).","Administrative burden on operators to verify markings, arrange/finance modifications, and retain records.","Change in earlier instrument scope: cancellation of Part 2 after manufacturer reassessment creates ambiguity unless background is noted (Background)."],"plain_english_summary":"Requires operators of all J.E.T. PS-823 standby power supply models to confirm the listed modification number is marked off or to install the modification following JET Service Bulletin SB501-1075-16F. Applies to the JET part numbers in the table; compliance is required within 100 hours time in service after 28 February 1981. Part 2 of the earlier Directive was cancelled after reassessment with the manufacturer. Practically, aircraft owners/operators must arrange and pay for inspection or modification and retain evidence of compliance (Requirement; Compliance; Background)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-elect-37-amdt-2-jet-electronics-and-technology-inc-standby-power-supply-modification","history":"/api/acts/ad-elect-37-amdt-2-jet-electronics-and-technology-inc-standby-power-supply-modification/history","analysis":"/api/acts/ad-elect-37-amdt-2-jet-electronics-and-technology-inc-standby-power-supply-modification/analysis","conflicts":"/api/acts/ad-elect-37-amdt-2-jet-electronics-and-technology-inc-standby-power-supply-modification/conflicts","importantCases":"/api/acts/ad-elect-37-amdt-2-jet-electronics-and-technology-inc-standby-power-supply-modification/important-cases","documents":"/api/acts/ad-elect-37-amdt-2-jet-electronics-and-technology-inc-standby-power-supply-modification/documents"}}