{"id":"F2006B02000","name":"AD/A330/21 Amdt 1 - Low Pressure Fuel Shut-Off Valve","slug":"ad-a330-21-amdt-1-low-pressure-fuel-shut-off-valve","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41222,"registerId":"commonwealth-F2006B02000-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/A330/21 Amdt 1 - Low Pressure Fuel Shut-Off Valve","content":"![](image.001.png)\n\nAIRWORTHINESS DIRECTIVE\n\n![](image.001.png)  \n\nFor the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/A330/21 and issues the following AD under subregulation 39.1 (1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\n![](image.001.png)  \n\nAirbus Industrie A330 Series Aeroplanes\n\nAD/A330/21\n\nAmdt 1\n\n  \nLow Pressure Fuel Shut-Off Valve 12/2003\n\nApplicability: Airbus A330-201, \\-202, \\-203, \\-223, \\-243, \\-301, \\-321, \\-322, \\-323, \\-341, \\-342 and \\-343\n\nseries aeroplanes, all serial numbers, fitted with low-pressure fuel shut-off valve (LPSOV) part number (P/N) HTE190021 or HTE190026.\n\nRequirement: 1. Unless already accomplished, carry out the following in accordance with instructions in Airbus Industrie Service Bulletin (SB) A330-28-3083 dated 25 March 2003:\n\n    Remove the LPSOV twin motor actuator (TMA).\n\n    b. Carry out an inspection of the TMA pedestal in accordance with paragraph\n\n3.C (2) and the flowchart of the SB.\n\n    c. Measure the distance between the face of the mounting flange and the top of the locating pin in accordance with paragraph 3.C (3) of the SB. If the distance is lower than or equal to 1.08 mm no further action is necessary.\n\n    2. If the Requirement 1.c. measurement determines that distance between the face of the mounting flange and the top of the locating pin is greater than 1.08 mm, replace the TMA in accordance with SB A330-28-3083.\n\n    3. A TMA with P/N HTE190021 or HTE190026 may not be installed on any aeroplane, as a replacement part, unless Requirement 1.c. has been accomplished.\n\nNote: DGAC AD 2003-359(B) refers.\n\nCompliance: For Requirement 1 \\- Remains unchanged as ‘Within 16,000 hours time in service or within 53 calendar months after the effective date of the original issue of this Directive, whichever occurs first.\n\nFor Requirement 2 \\- Before the next flight after the Requirement 1.c. measurement. For Requirement 3 - As of the effective date of this Directive.\n\nThis Amendment becomes effective on 27 November 2003.\n\nAirbus Industrie A330 Series Aeroplanes\n\nAD/A330/21 Amdt 1 (continued)\n\nBackground: During an unscheduled maintenance engine run on an A340 aeroplane, the Fire Push Button Switch was operated but the number 4 engine continued to run for approximately six minutes until shut down by other means. No ECAM warning was triggered and despite the fuel system display indicated a closed position for the LPSOV, the valve was not fully closed.\n\nThe valve assembly subsequently operated correctly following replacement of the fuel shut-off valve together with the associated pedestal assembly and the TMA.\n\nInvestigations by the supplier of the TMA showed that the locating pin of the TMA and the locating slot in the pedestal had been damaged. It was also found that in some instances, due to manufacturing tolerances, it is possible to install the TMA and the pedestal with an incorrectly aligned locating pin.\n\nThe original issue of this Directive corrected a potential unsafe condition by requiring a check of the locating pin length and an inspection of the pedestal for damage. The Directive also prohibited the installation of TMAs with certain part numbers unless they had been inspected.\n\nThis Amendment continues the requirements of the original issue, but expands the applicability to include aircraft with Airbus Modification 48225 incorporated during production as LPSOVs with P/N FRH010041 may have been replaced during service with either P/N HTE190021 or HTE190026.\n\nThe original issue of this Airworthiness Directive became effective 2 October 2003.\n\n![](image.002.png)  \n\nJim Coyne\n\nDelegate of the Civil Aviation Safety Authority 13 October 2003\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 5 November 2003.","sortOrder":0}],"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":3,"scope_assessment":{"changed":true,"description":"This Amendment 1 expands the original directive's scope. The original AD only covered certain production configurations, but this amendment adds aircraft with 'Airbus Modification 48225' because replacement parts (P/N HTE190021 or HTE190026) might have been installed during maintenance on those aircraft as well. The core safety action remains the same, but the net is cast wider to capture more potentially affected aircraft."},"complexity_factors":["Single technical subject matter (fuel valve inspection) with clear sequential steps","Only 2 defined part numbers in applicability section","Three distinct requirements with explicit cross-reference to Airbus Service Bulletin A330-28-3083","Simple conditional logic (measurement threshold of 1.08mm triggers replacement)","Straightforward compliance timeline (hours OR months, whichever first)","No nested exceptions or complex definitional sections","Background narrative explains technical rationale in accessible terms"],"plain_english_summary":"This AD orders inspection and, where needed, replacement of certain low‑pressure fuel shut‑off valve actuators on Airbus A330‑200/300 aircraft after reports the valve can fail to fully close when commanded. It also prohibits installing specified replacement parts unless inspected.\n\nIt affects operators with valves P/N HTE190021 or HTE190026. The issue risks continued fuel flow during an engine fire, creating a severe safety hazard."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Yes. The amendment expands the AD's applicability to include aircraft produced with Airbus Modification 48225 because LPSOVs originally fitted with P/N FRH010041 may have been replaced in service with P/N HTE190021 or HTE190026; the Amendment therefore broadens the set of aircraft required to comply — Background; Applicability."},"complexity_factors":["Precision measurement requirement (1.08 mm threshold) creates a technical inspection step requiring calibrated tools and judgement — Requirement 1.c.","Multiple specific part numbers and fitment rules increase tracking complexity (P/N HTE190021, HTE190026; prohibition on installation) — Applicability; Requirement 3.","Dependency on Airbus Service Bulletin procedures means operators must follow external technical instructions rather than text-only steps — Requirement 1 (SB A330-28-3083).","Staged compliance timing creates operational scheduling constraints: long-window periodic compliance for initial check (16,000 hours or 53 months) and an immediate-before-next-flight action if out-of-tolerance — Compliance; Requirement 2.","Replacement obligation where measurement exceeds tolerance imposes parts and labour costs and supply considerations for operators and MROs — Requirement 2.","Applicability expansion to aircraft with a production modification (Mod 48225) requires operators to cross-check production and service modification histories — Background; Applicability.","Cross-reference to foreign authority and original AD increases regulatory integration tasks for operators maintaining compliance records — Note (DGAC AD 2003-359(B)); Background."],"plain_english_summary":"This directive requires operators of specified Airbus A330 models fitted with low-pressure fuel shut-off valves (LPSOV) P/N HTE190021 or HTE190026 to remove and inspect the twin motor actuator (TMA), measure the locating-pin height (threshold 1.08 mm), replace the TMA if out of tolerance, and bars reinstalling those TMAs as replacements unless inspected.  It affects A330 operators and maintenance organisations because it mandates inspection, possible replacement, and time-bound compliance to ensure the valve can fully close when commanded."}},"importantCases":[],"_links":{"self":"/api/acts/ad-a330-21-amdt-1-low-pressure-fuel-shut-off-valve","history":"/api/acts/ad-a330-21-amdt-1-low-pressure-fuel-shut-off-valve/history","analysis":"/api/acts/ad-a330-21-amdt-1-low-pressure-fuel-shut-off-valve/analysis","conflicts":"/api/acts/ad-a330-21-amdt-1-low-pressure-fuel-shut-off-valve/conflicts","importantCases":"/api/acts/ad-a330-21-amdt-1-low-pressure-fuel-shut-off-valve/important-cases","documents":"/api/acts/ad-a330-21-amdt-1-low-pressure-fuel-shut-off-valve/documents"}}