{"id":"F2007L04533","name":"AD/GENERAL/51 - Electrical External Power Connection - Inspection - CANCELLED","slug":"ad-general-51-electrical-external-power-connection-inspection-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":71023,"registerId":"commonwealth-F2007L04533-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Aircraft - General","sectionType":"division","heading":"Aircraft - General","content":"### Aircraft - General\n\n| AD/GENERAL/51 | Electrical External PowerConnection - Inspection | 13/2007 |\n| ------------- | ------------------------------------------------ | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                 |\n| ------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 20 December 2007.                                                                                                                                                                                  |\n| Background:  | This AD was issued in 1975 to ensure that an external power supply with reverse polarity cannot be connected to the electrical system of the aircraft. The requirements of this AD are now covered by the design standard. |\n\n![](image.001.png)\n\nDavid Punshon  \nDelegate of the Civil Aviation Safety Authority\n\n18 October 2007","sortOrder":0},{"sectionNumber":"AD/GENERAL/51","sectionType":"part","heading":"AD/GENERAL/51","content":"## AD/GENERAL/51","sortOrder":1},{"sectionNumber":"Electrical External PowerConnection - In","sectionType":"part","heading":"Electrical External PowerConnection - Inspection","content":"## Electrical External Power  \nConnection - Inspection","sortOrder":2},{"sectionNumber":"13/2007","sectionType":"part","heading":"13/2007","content":"## 13/2007","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1336},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument performs exactly the function indicated by its title: it cancels the previous Airworthiness Directive AD/GENERAL/51. The scope has not expanded beyond this straightforward repeal."},"complexity_factors":["Single operative provision (cancellation of previous directive)","No defined terms, interpretation sections, or schedules","No conditional logic, exceptions, or 'if-then' provisions","Only one cross-reference (to the design standard that now covers the requirement)","Extremely short length (one substantive paragraph plus background)"],"plain_english_summary":"**What this does:** This document officially cancels a 1975 safety rule (Airworthiness Directive 51) that required inspections of aircraft electrical external power connections.\n\n**Why it existed:** The original rule was designed to prevent ground crews from accidentally connecting external power sources with **reversed polarity** (positive and negative wires swapped) to an aircraft's electrical system, which could damage sensitive avionics and electrical components.\n\n**Why it's being cancelled:** Modern aircraft are now built to **design standards** that already include built-in protection against reverse polarity connections. Since the safety protection is now embedded in how aircraft are manufactured, the separate inspection requirement is no longer necessary.\n\n**Who it affects:** Aircraft operators and maintenance engineers who previously had to comply with this specific inspection requirement for external power connections."}},"importantCases":[],"_links":{"self":"/api/acts/ad-general-51-electrical-external-power-connection-inspection-cancelled","history":"/api/acts/ad-general-51-electrical-external-power-connection-inspection-cancelled/history","analysis":"/api/acts/ad-general-51-electrical-external-power-connection-inspection-cancelled/analysis","conflicts":"/api/acts/ad-general-51-electrical-external-power-connection-inspection-cancelled/conflicts","importantCases":"/api/acts/ad-general-51-electrical-external-power-connection-inspection-cancelled/important-cases","documents":"/api/acts/ad-general-51-electrical-external-power-connection-inspection-cancelled/documents"}}