{"id":"F2007L00115","name":"AD/BAe 146/126 - Flight Deck ECS Grilles","slug":"ad-bae-146-126-flight-deck-ecs-grilles","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":68204,"registerId":"commonwealth-F2007L00115-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"British Aerospace BAe 146 Series Aeropla","sectionType":"division","heading":"British Aerospace BAe 146 Series Aeroplanes","content":"### British Aerospace BAe 146 Series Aeroplanes\n\n| AD/BAe 146/126 | Flight Deck ECS Grilles | 2/2007 |\n| -------------- | ----------------------- | ------ |\n\n| Applicability: | All Model BAe 146 and Avro 146-RJ Series aircraft with modification HCM00674A incorporated.                                                                                                                                             |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Accomplish modification action in accordance with BAe Systems Service Bulletin 25-495-60730A original issue, or later EASA approved revision.Note: EASA AD 2006-0342 refers.                                                            |\n| Compliance:    | Within six months after 15 February 2007.                                                                                                                                                                                               |\n|                | This Airworthiness Directive becomes effective on 15 February 2007.                                                                                                                                                                     |\n| Background:    | There are four ECS grilles located in the flight deck side consoles. Detachment of grilles has occurred during flight. The possibility exists that a loose grille could foul the rudder pedals and interfere with rudder/brake control. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n19 December 2006","sortOrder":0},{"sectionNumber":"AD/BAe 146/126","sectionType":"part","heading":"AD/BAe 146/126","content":"## AD/BAe 146/126","sortOrder":1},{"sectionNumber":"Flight Deck ECS Grilles","sectionType":"part","heading":"Flight Deck ECS Grilles","content":"## Flight Deck ECS Grilles","sortOrder":2},{"sectionNumber":"2/2007","sectionType":"part","heading":"2/2007","content":"## 2/2007","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive addressing a specific safety defect in specific aircraft. It has not expanded beyond its original purpose of mandating a safety modification for cockpit grille detachment."},"complexity_factors":["Single, specific technical requirement referencing an external service bulletin","Narrow applicability limited to specific aircraft models with one modification","Simple compliance deadline (fixed date + 6 months)","No nested exceptions, conditional logic, or extensive defined terms","Straightforward background explanation without cross-references to other legislation","Total length is extremely short (under 200 words of substantive content)"],"plain_english_summary":"This AD requires owners/operators of BAe 146 and Avro 146‑RJ aircraft fitted with modification HCM00674A to carry out a mandated cockpit air‑conditioning grille modification per BAe Systems Service Bulletin 25‑495‑60730A. The grilles have detached in flight and could jam under the rudder pedals, risking loss of control. Work must be completed within six months of 15 February 2007."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"No change in scope is indicated by the text: the AD targets a specific set of aircraft (those with HCM00674A) and mandates a single modification per the BAe Service Bulletin within a six‑month window. The instrument does not expand applicability, add exemptions, or alter obligations beyond the stated modification and timing (Applicability; Requirement; Compliance)."},"complexity_factors":["Narrow applicability — only BAe 146/Avro 146‑RJ aircraft with modification HCM00674A (Applicability).","Single mandated action — implement the specific Service Bulletin or later EASA‑approved revision (Requirement).","Definite compliance deadline — within six months after 15 February 2007 (Compliance).","Regulatory cross‑reference — allows later EASA‑approved revisions, creating dependency on external regulatory approvals (Requirement).","Technical implementation — modification follows a manufacturer Service Bulletin, implying specialised maintenance, parts and approved procedures (Requirement)."],"plain_english_summary":"This Airworthiness Directive requires operators of BAe 146 and Avro 146‑RJ aircraft fitted with modification HCM00674A to carry out the BAe Systems Service Bulletin 25‑495‑60730A modification (or a later EASA‑approved revision). Its stated purpose is to stop flight‑deck ECS grilles detaching in flight and possibly fouling the rudder pedals; compliance is required within six months after 15 February 2007. (Applicability; Requirement; Background; Compliance)"}},"importantCases":[],"_links":{"self":"/api/acts/ad-bae-146-126-flight-deck-ecs-grilles","history":"/api/acts/ad-bae-146-126-flight-deck-ecs-grilles/history","analysis":"/api/acts/ad-bae-146-126-flight-deck-ecs-grilles/analysis","conflicts":"/api/acts/ad-bae-146-126-flight-deck-ecs-grilles/conflicts","importantCases":"/api/acts/ad-bae-146-126-flight-deck-ecs-grilles/important-cases","documents":"/api/acts/ad-bae-146-126-flight-deck-ecs-grilles/documents"}}