{"id":"F2005L01740","name":"AD/A330/38 Amdt 1 - Liquid Crystal Display Units","slug":"ad-a330-38-amdt-1-liquid-crystal-display-units","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":35816,"registerId":"commonwealth-F2005L01740-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Airbus Industrie A330 Series Aeroplanes","sectionType":"division","heading":"Airbus Industrie A330 Series Aeroplanes","content":"### Airbus Industrie A330 Series Aeroplanes\n\n| AD/A330/38 Amdt 1 | Liquid Crystal Display Units | 8/2005 |\n| ----------------- | ---------------------------- | ------ |\n\n| Applicability: | Airbus A330 series aeroplanes, all serial numbers, that have EIS2 (Electronic Instrument System) LCD (Liquid Crystal Display) Display Units (DU) installed in accordance with Airbus modification 47524, 50161, 50183, 50616 or 51153 during production or in accordance with Airbus Service Bulletin (SB) A330-31-3056 or A330-31-3057 or later DGAC approved revision whilst in service. |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| | This Directive is not applicable to aeroplanes with Airbus modification 51974 or SB A330-31-3069 and modification 53923 or SB A330-31A3080 or later DGAC approved revisions to either SB incorporated. |\n| Requirement: | 1. The following dispatch limitations are mandatory for all flights: |\n| | MMEL REPERCUSSIONS:For aircraft equipped with EIS2 LCD Display Units and with conventional standby instruments:- Dispatch with the standby IAS (Indicated Airspeed) indicator inoperative (MMEL 34-21-01) is no longer authorised.- Dispatch with inoperative standby horizon or inoperative standby altimeter may be authorised provided that the crew maintains VMC conditions during the entire flight and day-light conditions.For aircraft equipped with EIS2 LCD Display Units and with the Integrated Standby Instrument System (ISIS):- Dispatch with the ISIS airspeed function inoperative (MMEL 34-22-03-C) is no longer authorised.- Dispatch with inoperative ISIS horizon function or inoperative ISIS altitude function may be authorised provided that the crew maintains VMC conditions during the entire flight and day-light conditions.Reminder: For dispatch with one Display Unit inoperative as per MMEL 31-63-01, it is reminded that the subject Display Unit must be switched-off as per associated MMEL operational procedure. |\n\n| | Incorporation of the Master Minimum Equipment List (MMEL) changes or a copy of this Directive in the Aircraft Operations Manual is a satisfactory method of compliance with this Requirement. |\n| --- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| | 2. The following operational limitations are mandatory for all flights: |\n| | Aircraft not equipped with FWC STD K7/486 (MOD 49193) |\n| | LOSS OF ALL DISPLAY UNITSThis Temporary Revision gives the procedure to be followed in case of loss of all Display Units (DU).Autopilot, autothrust and MCDU navigation data are still available and may be used.Monitor the flight by using standby instruments.Wait at least 40 seconds for automatic DU recovery.• If one or more DU is not automatically recovered after 40 seconds:Set the non-recovered DUs to OFF.After 40 seconds, sequentially switch them back to ON.• If all DUs are lost again when switching a given DU back to ON:Set all the DUs to OFF.After 40 seconds, switch them back to ON except the given DU which must be left permanently OFF. |\n| | Aircraft equipped with FWC STD K7/486 (MOD 49193) |\n| | LOSS OF ALL DISPLAY UNITSThis Temporary Revision gives the procedure to be followed in case of loss of all Display Units (DU).Autopilot, autothrust and MCDU navigation data are still available and may be used.Monitor the flight by using standby instruments.Wait at least 40 seconds for automatic DU recovery.• If one or more DU is not automatically recovered after 40 seconds:Set the non-recovered DUs to OFF.After 40 seconds, sequentially switch them back to ON.• If all DUs are lost again when switching a given DU back to ON:Set all the DUs to OFF.After 40 seconds, switch them back to ON except the given DU which must be left permanently OFF. |\n\n| | • If one or more ECAM DU must remain OFF:• If ECAM DUAL DU reconfiguration is possible:Set the ECAM/ND selector to CAPT or F/O.• If ECAM DUAL DU reconfiguration is not possible or if the possible DU configuration is not appropriate for the type of approach:Both FWC will be lost during approach so monitor systems on overhead panel.Note: ECAM cautions and warnings, aural warnings, master caution, warning lights, auto callouts and altitude alerts are lost during approach.Only CAT I approach is allowed.” |\n| ----------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| | Incorporation of Aircraft Flight Manual (AFM) Temporary Revision TR 4.02.00/23, TR 4.02.00/24 or a copy of this Directive in the Aircraft Operations Manual is a satisfactory method of compliance with this Requirement. |\n| | Note: DGAC AD F-2004-117 R1 (EASA Approval 2005-4752) refers. |\n| Compliance: | For Requirements 1 and 2 - Remains unchanged as “After 4 August 2004”. |\n| | This Amendment becomes effective on 4 August 2005. |\n| Background: | The Direction Générale de l’Aviation Civile of France has advised that an A320 operator reported the erratic behavior of all EIS2 LCD DUs in cruise for duration of three minutes with a total loss LCD DUs for 30 seconds. As a precaution the pilot disconnected the autopilot and standby instruments were used. All DUs were finally recovered and the flight continued normally.Analysis confirmed that the three Display Management Computers have received erroneous data from one LCD Unit.Airbus issued Operators Information Telex (OIT) and Flight Operations Telex (FOT) SE 999.0114/03/VHR Revision 1, which gives the Master Minimum Equipment List (MMEL) changes resulting from this event and operational recommendations to be followed in case of all DUs failed with INVALID DATA display. |\n| | Several similar events have been reported on the Airbus Single Aisle fleet since the issue of the OIT, showing the need to make sure that the crew is well informed of the procedure to apply in similar situations. This procedure “Loss of all display units” is detailed in A330 AFM TR 4.02.00/23. An equivalent procedure detailed in AFM TR 4.02.00/24 and 4.02.00/39 has also been developed for A330 aircraft fitted with FWC STD K7/486 (Hardware - 486). |\n\n| | This Amendment continues the requirements of the original issue of the Directive. However, the Amendment provides relief for operators who have incorporated the new EIS2 standard ‘L5’ together with the associated activation of a monitoring function (CRC) either by way of modification during production or incorporation of service bulletins. This allows cancellation of the operational limitations (both AFM and MMEL TR). |\n| --- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| | The original issue of this Directive became effective on 4 August 2004. |\n\n![](image.001.png) \nJames Coyne \nDelegate of the Civil Aviation Safety Authority\n\n24 June 2005","sortOrder":0},{"sectionNumber":"AD/A330/38 Amdt 1","sectionType":"part","heading":"AD/A330/38 Amdt 1","content":"## AD/A330/38 Amdt 1","sortOrder":1},{"sectionNumber":"Liquid Crystal Display Units","sectionType":"part","heading":"Liquid Crystal Display Units","content":"## Liquid Crystal Display Units","sortOrder":2},{"sectionNumber":"8/2005","sectionType":"part","heading":"8/2005","content":"## 8/2005","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":6,"scope_assessment":{"changed":false,"description":"This amendment remains focused on its original purpose: addressing LCD display unit failures in A330 aircraft. The amendment provides relief (exemptions) for operators who have installed newer fixed equipment, which is a natural evolution of the safety directive rather than scope creep. The core safety mandate — ensuring pilots can handle total display failure — remains unchanged from the original 2004 directive."},"complexity_factors":["Multiple nested applicability conditions involving serial numbers, production modifications, and service bulletins","Two distinct aircraft configurations requiring different procedural responses (with/without FWC STD K7/486)","Cross-references to external documents: MMEL (Master Minimum Equipment List), AFM (Aircraft Flight Manual), DGAC AD, EASA approvals, and multiple Airbus Service Bulletins","Conditional logic for dispatch limitations based on equipment status (VMC conditions, day-light requirements)","Multi-step recovery procedures with branching logic (if/then scenarios for display unit recovery)","Technical aviation acronyms throughout (EIS2, DU, MMEL, AFM, FWC, ISIS, ECAM, ND, CAT I, CRC) requiring domain knowledge","Amendment structure that modifies previous requirements while maintaining some original compliance dates"],"plain_english_summary":"This CASA Airworthiness Directive targets Airbus A330s with the EIS2 electronic display system (unless later modified), mandating operational limits, emergency procedures for total display failures (including timed recovery and manual reset steps), and flight manual updates. \n\nIt affects operators of those aircraft because a sudden, complete loss or erratic behavior of all flight displays—an event reminiscent of a 2003 A320 incident—can force reliance on tiny backup instruments and poses a major safety risk."},"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"},"flash_summary":{"complexity_score":6,"scope_assessment":{"changed":true,"description":"This Amendment narrows the operational scope compared with the original issue by creating a specific relief pathway: aeroplanes that have implemented the EIS2 L5 standard with an activated CRC monitoring function (either by production modification or by incorporation of specified Service Bulletins) may have the operational limitations cancelled. It also explicitly excludes aeroplanes that have incorporated later listed modifications/service bulletins (mods 51974/53923 or SBs A330-31-3069/A330-31A3080). In short, the Amendment retains the original safety procedures and MMEL/AFM requirements for affected aircraft but reduces the population subject to those limitations by exempting upgraded aircraft, thereby shifting some of the ongoing operational burden onto operators who have not performed the upgrade."},"complexity_factors":["Multiple applicability conditions referencing 6 production modifications and several Service Bulletins (mods 47524, 50161, 50183, 50616, 51153; SBs A330-31-3056, A330-31-3057).","Explicit exclusions referencing later modifications/SBs (mod 51974 or SB A330-31-3069; mod 53923 or SB A330-31A3080), requiring accurate configuration control.","Two separate mandatory requirement blocks: MMEL (Requirement 1) and AFM operational procedures (Requirement 2).","Conditional procedures differing by aircraft FWC standard (with or without FWC STD K7/486) — duplicate but slightly different text for each configuration.","Nested operational logic with timed steps and sequential actions (e.g., wait 40 seconds for automatic recovery, set non‑recovered DUs OFF, sequential restart, permanently leave persistently failing DU OFF).","Interplay between MMEL dispatch permissions and AFM temporary revisions (i.e., operational authorisations depend on both manual updates and crew actions).","Relief pathway tied to embodiment of a higher EIS2 standard (L5) and activation of a CRC monitoring function — adds a compliance-as-exemption branch.","Cross-references to external authorities and documents (DGAC AD, EASA approval, Airbus OIT/FOT, SBs, AFM Temporary Revisions), increasing tracing and administrative work."],"plain_english_summary":"**What this instrument does (mechanically)**\n\n- It imposes mandatory operational and dispatch rules for Airbus A330 aeroplanes that have the EIS2 (Electronic Instrument System) Liquid Crystal Display (LCD) Display Units (DUs) installed by specific production modifications or service bulletins. (See the \"Applicability\" paragraph — mods 47524, 50161, 50183, 50616, 51153 or SB A330-31-3056/A330-31-3057 or later DGAC-approved revisions.)\n- It requires operators to adopt Master Minimum Equipment List (MMEL) changes (Requirement 1) and Aircraft Flight Manual (AFM) Temporary Revisions (Requirement 2) or to insert an equivalent copy of the Directive into the Aircraft Operations Manual as an acceptable means of compliance.\n- It specifies concrete in‑flight procedures for crews in the event of partial or total loss of DUs (including a timed restart sequence: wait 40 seconds for automatic recovery, then switch non-recovered DUs OFF and attempt sequential restarts, leaving persistently failing DUs OFF) and additional steps when ECAM DU reconfiguration is required during approach.\n- It changes which dispatch conditions are allowed: certain dispatch-with-inoperative-standby-instrument allowances are withdrawn when EIS2 LCD DUs are installed, and similar restrictions apply where the Integrated Standby Instrument System (ISIS) is fitted. Some inoperative functions remain dispatchable only in Visual Meteorological Conditions (VMC) during daylight.\n- The Amendment provides relief (cancels the operational limitations) for aeroplanes that have the EIS2 L5 standard plus an activated monitoring function (CRC) installed via specified modifications or service bulletins.\n\n**Who it affects**\n\n- Airlines/operators of Airbus A330 aircraft that have the EIS2 LCD DUs installed as listed (all serial numbers with those installations).\n- Flight crews, because it changes dispatch authorization and prescribes in‑flight procedures for loss of display units (AFM Temporary Revisions and MMEL entries).\n- Maintenance organisations and engineering departments, because compliance may require incorporation of Service Bulletins or modifications, and updating manuals (MMEL/AFM/Operations Manual).\n- Aircraft that already have later modifications or SBs (mod 51974 / SB A330-31-3069 or mod 53923 / SB A330-31A3080) are excluded from the Directive (not applicable).\n\n**Why it matters (stated purpose and practical effects)**\n\n- Stated purpose: the Directive responds to events in which EIS2 LCD DUs behaved erratically or temporarily failed (Background). It prescribes operational limits and crew procedures to reduce risk if the same failure occurs.\n- Practical effects on operators: they must update manuals (MMEL/AFM/Operations Manual), train crews on the new procedures (including the 40‑second wait and restart sequencing), and accept tighter dispatch restrictions in certain inoperative instrument scenarios (for example, loss of standby airspeed indication or ISIS airspeed function is no longer dispatchable in some configurations).\n- Incentives created: operators face a choice — apply the procedural and manual changes and operate under the tighter dispatch rules, or invest in the L5/CRC hardware/software changes to obtain relief and restore normal dispatch flexibility. The cost of upgrades (modification/SB incorporation) and training is borne by operators; the safety remediation and reduced operational risk are the measurable benefits.\n\n**Concrete mechanisms, trade-offs and implementation points to watch**\n\n- The Directive imposes explicit crew actions in a failure scenario (timing, switching DUs OFF/ON, leaving persistently failing DU OFF). These are procedural remedies rather than hardware fixes. (Requirement 2 — AFM Temporary Revision: \"LOSS OF ALL DISPLAY UNITS\" procedure.)\n- Dispatch limitations are implemented by changing MMEL entries and/or adding the Directive text to the Operations Manual (Requirement 1). That changes the set of allowable inoperative equipment configurations for dispatch: some previously authorised dispatches are withdrawn for affected aircraft (e.g. standby IAS indicator or ISIS airspeed function). This imposes an operational cost (more flight interruptions, cancellations or maintenance actions) where those items fail.\n- The Amendment narrows the scope for aircraft that have implemented a later EIS2 standard (L5) with an activated CRC monitoring function. Those aircraft can have the operational limitations cancelled; that reduces ongoing operational burden but requires capital/maintenance investment to install and activate the standard and monitoring function.\n- Exceptions and applicability are determined by incorporation of particular Airbus modifications or Service Bulletins. Operators must track configuration status (which mods or SBs are embodied) to know whether the Directive applies or whether relief is available.\n- Risk of implementation failure: the safety benefit relies on accurate configuration control (maintenance records showing which SBs/mods are embodied) and on crew compliance with the AFM/MNEL procedures during real incidents. There is no automatic hardware mitigation mandated for all aircraft — the primary mandated mitigations are procedural and administrative unless the operator elects the L5/CRC upgrade.\n\n**Where to look in the text for key items**\n\n- Applicability paragraph — lists which mods/SBs make the Directive applicable and which later mods/SBs make it inapplicable.\n- Requirement 1 — MMEL dispatch repercussions and how to comply (insert MMEL changes or directive copy in Operations Manual).\n- Requirement 2 — AFM Temporary Revision with the step‑by‑step loss‑of‑DU procedure, and alternate text where aircraft have FWC STD K7/486.\n- \"This Amendment\" paragraph — explains relief for aircraft with EIS2 L5 + CRC and cancellation of limitations.\n\n**Net effect in one sentence**\n\nOperators of affected A330s must adopt new MMEL/AFM procedural restrictions and crew actions to manage erratic or lost EIS2 LCD displays, unless they upgrade to the EIS2 L5 standard with the CRC monitoring function (or have later exempting modifications/SBs), in which case the operational limits can be cancelled."}},"importantCases":[],"_links":{"self":"/api/acts/ad-a330-38-amdt-1-liquid-crystal-display-units","history":"/api/acts/ad-a330-38-amdt-1-liquid-crystal-display-units/history","analysis":"/api/acts/ad-a330-38-amdt-1-liquid-crystal-display-units/analysis","conflicts":"/api/acts/ad-a330-38-amdt-1-liquid-crystal-display-units/conflicts","importantCases":"/api/acts/ad-a330-38-amdt-1-liquid-crystal-display-units/important-cases","documents":"/api/acts/ad-a330-38-amdt-1-liquid-crystal-display-units/documents"}}