{"id":"F2006L01052","name":"AD/B767/220 - Fuel Crossfeed Valve","slug":"ad-b767-220-fuel-crossfeed-valve","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":58348,"registerId":"commonwealth-F2006L01052-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 767 Series Aeroplanes","sectionType":"division","heading":"Boeing 767 Series Aeroplanes","content":"### Boeing 767 Series Aeroplanes\n\n| AD/B767/220 | Fuel Crossfeed Valve | 5/2006 |\n| ----------- | -------------------- | ------ |\n\n| Applicability: | Boeing 767-200 and 767-300 series aeroplanes operated in extended range operations.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | Unless previously accomplished, amend the aeroplane Flight Manual by including a statement to the following effect:This aeroplane should not be operated beyond the single engine cruise range of an adequate aerodrome whilst on direct fuel feed, unless a satisfactory operational check of the fuel crossfeed valve has been carried out. This check should be performed during the last hour of the previous flight or prior to reaching the above critical phase of the extended range flight after adequate cold soak time at cruise altitude to include temperature effects on valve performance.Note: FAA AD 88-21-03 R1 Amdt 39-6077 refers. |\n| Compliance:    | Within 30 days after the effective date of this AD.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |\n|                | This Airworthiness Directive becomes effective on 11 May 2006.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |\n| Background:    | This AD is intended to prevent failure of the crossfeed valve during a single engine diversion on an extended range flight. The failure of the valve could result in the inability of the valve to stay within the aeroplane lateral imbalance limit or in fuel starvation in the operating engine before the aeroplane is able to reach the diversion airport.This AD supersedes the requirements previously detailed in AD/B767/29 Amdt 5.                                                                                                                                                                                                           |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n27 March 2006","sortOrder":0},{"sectionNumber":"AD/B767/220","sectionType":"part","heading":"AD/B767/220","content":"## AD/B767/220","sortOrder":1},{"sectionNumber":"Fuel Crossfeed Valve","sectionType":"part","heading":"Fuel Crossfeed Valve","content":"## Fuel Crossfeed Valve","sortOrder":2},{"sectionNumber":"5/2006","sectionType":"part","heading":"5/2006","content":"## 5/2006","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific mechanical failure mode (fuel crossfeed valve failure) in specific aircraft during extended range operations. It supersedes a previous amendment (AD/B767/29 Amdt 5) but does not expand beyond the original safety purpose."},"complexity_factors":["Single operational requirement with one main condition (the operational check)","Only 2 aircraft variants specified in applicability","Straightforward compliance deadline (30 days from effective date)","No nested definitions or extensive cross-referencing to other legislation","Single background rationale clearly stated","Note references related FAA directive but does not incorporate by complex cross-reference"],"plain_english_summary":"This AD requires operators of Boeing 767-200/-300 on extended‑range (ETOPS) flights to amend flight manuals so pilots may not continue beyond one‑engine diversion range unless the fuel crossfeed valve has been verified operable. The check must be done either within the last hour of the previous flight or before the critical phase after a high‑altitude cold soak. It targets airlines on long over‑water/remote routes to prevent fuel imbalance or starvation in single‑engine contingencies."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD stays within the original safety objective of preventing crossfeed valve failure consequences on extended range single‑engine diversions. It supersedes the earlier AD/B767/29 but does not materially broaden the population affected or add new categories of obligation beyond formalising a Flight Manual statement and a one‑off operational check requirement. The core scope (B767-200/-300 in extended range operations, safety mitigation for crossfeed valve failure) remains consistent with the original intent."},"complexity_factors":["Single substantive requirement: insert a Flight Manual statement and perform an operational check","Applicability limited to Boeing 767-200 and 767-300 in extended range operations","Short compliance window: 30 days from effective date","Cross-reference to FAA AD 88-21-03 R1 and supersedes AD/B767/29 (historical linkage)","Operationally vague terms: 'satisfactory operational check' and 'adequate cold soak time' (delegates method to operator)","No detailed procedural or technical standard for the required check (delegates to operator/maintenance organisations)"],"plain_english_summary":"**What this instrument does (mechanically)**\n\n- Requires operators of Boeing 767-200 and 767-300 aeroplanes that fly in extended range operations to change the aeroplane Flight Manual (the onboard operating instructions). (See: \"Requirement\".)\n- The new Flight Manual statement must warn that the aeroplane should not be flown beyond the single‑engine cruise range of a usable diversion airport while on direct fuel feed unless a satisfactory operational check of the fuel crossfeed valve has been carried out. The check must be done either during the last hour of the previous flight or before entering the critical phase of the extended range flight, and after enough time at cruise altitude for cold‑soak temperature effects on the valve to take place. (See: \"Requirement\".)\n- Operators must comply within 30 days of the AD's effective date. (See: \"Compliance\".)\n- The AD references FAA AD 88‑21‑03 R1 and supersedes an earlier Australian AD (AD/B767/29). (See: \"Note\" and \"Background\".)\n\n**Who this affects**\n\n- Airline operators or other entities that operate Boeing 767-200 and 767-300 aircraft on extended range operations (flights planned so the aeroplane may be some distance from diversion aerodromes). (See: \"Applicability\".)\n- Pilots and operations staff who use (and must follow) the aeroplane Flight Manual, and maintenance/engineering staff who perform the operational check when called for.\n\n**Why it matters (safety mechanism)**\n\n- The purpose stated in the AD is to reduce the risk that a fuel crossfeed valve will fail during a single‑engine diversion on an extended range flight. If the valve fails, the aeroplane may develop a lateral fuel imbalance beyond limits or suffer fuel starvation to the operating engine before the aeroplane can reach a diversion airport. (See: \"Background\".)\n\n**How it changes behaviour and decision‑making (who pays, who decides)**\n\n- Who pays: the operator bears the cost of amending the Flight Manual (administrative cost) and of conducting any additional operational checks or flight planning adjustments. If the check uncovers a problem, repair costs and potential downtime are borne by the operator.\n- Who decides: the operator/pilot must ensure the Flight Manual contains the required statement and must decide when to perform the operational check; the AD does not supply a detailed test procedure, so the operator/maintenance organisation decides the exact method that constitutes a \"satisfactory operational check.\" (See: \"Requirement\" and the absence of a procedural standard.)\n- Behaviour change: operators will either (a) perform the crossfeed valve operational check in the specified window (last hour of the previous flight or before the critical phase after cold soak), or (b) avoid operating beyond single‑engine cruise range on direct fuel feed unless the check has been done. That affects flight planning choices and may impose additional pre‑flight/turnaround tasks.\n\n**Implementation details and practical implications**\n\n- Timing constraint: the check must be performed in the last hour of the previous flight or before the critical phase after an \"adequate cold soak time at cruise altitude\" — this introduces an operational timing requirement tied to thermal effects on valve performance. (See: \"Requirement\".)\n- Vague terms: the AD uses subjective phrases such as \"satisfactory operational check\" and \"adequate cold soak time,\" which leave method and duration to operator judgement or existing maintenance procedures. That can lead to different compliance practices between operators and may require operators to document their chosen methods to satisfy regulators.\n- Cross‑reference and history: the AD relies on and points to FAA AD 88‑21‑03 R1 for context and supersedes a previous Australian AD (AD/B767/29). Operators familiar with the earlier AD should check how their existing procedures align. (See: \"Note\" and \"Background\".)\n\n**Costs, trade‑offs and risks**\n\n- Direct costs are likely modest for most operators (manual amendment and running checks), but there is potential for operational cost if checks reveal defects requiring repair or if flight dispatches are delayed to satisfy the check requirement.\n- Trade‑offs: the measure imposes modest recurring procedural and planning costs in exchange for reduced risk of in‑flight fuel imbalance or engine fuel starvation on extended range single‑engine diversions.\n- Implementation risk: because the AD does not define a standard test or specific cold soak duration, regulators may need to accept operator procedures or issue guidance; inconsistent practices could create legal or operational uncertainty.\n- Substitution effects: operators may adjust routing or fuel planning to avoid being in the excluded operating condition (beyond single‑engine cruise range on direct feed) rather than absorb the check burden.\n\n**Source claim and testing it against mechanics**\n\n- The AD's stated intent is safety (prevent crossfeed valve failure consequences). Mechanically, the AD accomplishes this by mandating a Flight Manual change that creates an operational requirement for pre‑flight or pre‑critical‑phase functional verification of the valve. The AD does not mandate a specific engineering fix or repetitive inspection interval; it relies on operational checking to manage the failure risk. (See: \"Requirement\" and \"Background\".)"}},"importantCases":[],"_links":{"self":"/api/acts/ad-b767-220-fuel-crossfeed-valve","history":"/api/acts/ad-b767-220-fuel-crossfeed-valve/history","analysis":"/api/acts/ad-b767-220-fuel-crossfeed-valve/analysis","conflicts":"/api/acts/ad-b767-220-fuel-crossfeed-valve/conflicts","importantCases":"/api/acts/ad-b767-220-fuel-crossfeed-valve/important-cases","documents":"/api/acts/ad-b767-220-fuel-crossfeed-valve/documents"}}