ATA Spec 2000 Reliability Data Collection And Exchange .

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ATA Spec 2000 Reliability Data Collection andExchange / Reliability Metrics2011 ATA e-Business ForumJohn NazarethSenior Reliability SpecialistBombardier Commercial Aircraft

Outline The Reliability Interest Group Overview of SPEC2000 Chapters 11/13 SPEC2000 Chapter 11 – What is it? Reliability Data Records Chapter 13-2 Reliability Metrics – Those just included in the spec Reliability Metrics – Coming soon Conclusion – The Challenge Conclusion – An Opportunity for Growth

ATA Reliability Interest Group (RIG) Charter Purpose To provide an industry forum for developing electronic data exchangestandards related to aircraft reliability, maintenance and repair data Responsibilities Responsible for maintaining Spec2000 Chapter 11’s, Reliability data collection/exchange recordsSpec2000 Chapter 13-2’s Reliability metricsRecently the RIG has begun updating Spec2000 Chapter 15’s, aircraftdelivery record using data elements from Spec2000 Chapter 11The RIG has the following Project Teams E-Logbook Project Team Electronic Teardown Project TeamChair – John Yakubowsky Boeing

Organizational Structure4

Recent RIG Developments The RIG has grown, with increased participants and issues To be able to address the large number of action items in a timelymanner we have developed sub teams: IT Implementation sub team led by John Yakubowsky, Boeing – actingReliability Metrics Development sub team led by John Nazareth, BombardierDelivery Configuration Record sub team led by Audrey Fauconnier, AirbusData Definitions sub team led by Sebastien Touzot, Airbus

SPEC2000 Chapters 11/13OverviewOperators, suppliers and airframers needed to collect, organize andexchange reliability data between each other. An industry standardallows all parties to do this efficiently and cost effectively.

SPEC2000 Chapter 11/13, Overview & EvolutionAircraftReliability ility DataCollection TaskForce begins02/200104/1997ATA releasesSPEC2000Chapter 1101/200209/2001CreatedComponentReliability dataCollectionstandard inChapter 1104/201105/2004RIGestablishesframework fordeveloping aircraftreliability datastandardsCont.ATA expandsReliabilitymetrics inSPEC2000Chapter 13Reliability Interest Group has the largest activeparticipation within the SPEC2000 family.21

SPEC2000 Chapter 11/13 - Overview SPEC2000 Chapter 11 – “Aircraft Reliability Data Collection andExchange”, has been part of ATA Spec2000 since May 2004 It was endorsed by IATA for use by it’s members in January 2005 Called out in ISO STEP 10303 / AP 239 PLCS It is now being refined as operators use it. SPEC2000 Chapter 13 - Performance Metrics Standards. Section 13.2 – Reliability Metrics was significantly expanded in April 2011.

SPEC2000 Chapter 11 - What is it? It defines what events constitute the reliability & maintainability landscape ofaircraft in the air transport business It identifies which elements within each event are important to capture It defines a protocol for exchanging data – XMLIt defines what each element identified meansIt is a common language that allows aviation industry partners to exchangedetailed reliability data easily and cost effectively.If your organization subscribes to SPEC2000 forstandards such as material procurement, you already haveaccess to the reliability data records in Chapter 11.

SPEC2000 Chapter 11 Reliability Data Records

SPEC2000 Chapter 11 Records TypesSolid lines indicate matching fieldstying associated records in currentrecords. Underlined TEI representskey field for record.ACLOGBOOKOEI(MTN)HRIBroken lines indicate data associationsnot directly linked.Combination of CAGE code, PN,SN,Date and MSN is always unique fortracking components.AC STATUSCHANGE(Operator/Leaser)AC HRS/LDG(Report)AC EVENTSERIOEILRURMVLRTIOEI(MTN)ERIHRIAC CONFIGAs Delivered &Maintained(Not in GSSFIRTIENGCONFIGAs Delivered &Maintained(Not in CurrentScope)ENG ShopFindings(Not in CurrentScope)OEI - Logbook Record IdentifierERI - Event Record IdentifierHRI - Schedule Maintenance RecordIdentifierRTI - Removed LRU Record IdentifierSFI - Shop Findings Record Identifier(MTN) - Maintenance Tracking Identifier(Sublevel to OEI and/or HRI)

SPEC2000 Chapter 11 Record TablesChapter 11 has 10 records : Aircraft Hours and Landings Record Aircraft Event Record Purpose : Collect details of the components removed from an aircraft aswell as reasons for removal and details of component being installed.Shop Findings Record Purpose : To capture aircraft event data such as delays, cancellations,incidents, etc.LRU Removal Record Purpose: Collect detailed hours, cycles and utilization data from operators.This data can also be used as the basis for MTBUR calculations, etc.Purpose: Collect detailed component tear down reports from an airline’sshop or other repair facilities.Piece Part Record Purpose: A supplement to the Shop Findings record, to find out the detailsof the failed part.

SPEC2000 Chapter 11 Record Tables Aircraft Logbook Record Scheduled Maintenance Record Purpose : Provide data on service bulletin/mod incorporation andunincorporation.Aircraft Status Change Record Purpose : Collect scheduled (heavy and line) maintenance data, findings andcorrective action, and provide reference ability back to the operator’smaintenance program.Service Bulletin/Modification Record Purpose : Collect technical/journey log entries such as pilot reports,maintenance corrective action, etc.Purpose : Capture changes in aircraft ownership, operator, long term storagedisposition, engine model changes, etc.Summary Counts Record Purpose : Collect summarized rate and count information on an operator'sfleet, e.g. schedule interruption counts by ATA, etc.

SPEC2000 Chapter 11 Record TablesField NameNbr1InformationLevelData to beCollected(BusinessTerms)Data Element(CSDD)TEIField Type (Mandatory vs Conditional)Condition Data TypeSize:min/maxExampleSegment Header“HDR”Business rules /commentsThe Header Segment isMandatory.This segment is sent onlyonce per transmission ofAircraft Hours andLandings record.2Record StatusChange CodeCHGMandatoryAN1/1NThe valid codes areN New; D Delete; T Total nizationCodeROCMandatoryAN3/5UALShould be CAGE orNCAGE code.Use code ZZZZZ if noCAGE/NCAGE isavailableOR use ICAO code uired if the reportingorganization has noCAGE/NCAGE Code.5Operator CodeOperator CodeOPRMandatoryAN3/5UALThis code should supportICAO 3-digit airlinedesignator for reliabilityapplications.Use ZZZZZ if no ICAOcode is available.This element is a KEYfield in the record.6Operator NameCompany Name WHOConditionalAN1/55UnitedAirlinesRepresents the name ofoperator in reliabilityapplications.Mandatory, if operator ofthe aircraft has no ICAOoperator code.FieldDefinitions

Aircraft Event RecordReporting Organization CodeOperator CodeAirframe Manufacturer CodeAircraft ModelAircraft SeriesAircraft Manufacturer Serial NumberAircraft Registration NumberOperator Aircraft Internal IdentifierAircraft Engine TypeEngine Position CodeEngine Serial NumberAircraft Engine ModelAircraft Engine Manufacturer CodeAircraft APU TypeAircraft APU Serial NumberAircraft APU ModelAircraft APU Manufacturer CodeEvent Record IdentifierIncident Occurrence DateDeparture / Reporting Station CodeAircraft Cumulative Total Flight HoursAircraft Cumulative Total CyclesEngine Cumulative HoursEngine Cumulative CyclesAPU Cumulative HoursAPU Cumulative CyclesInterruption CodeTotal Number of Consequential InterruptionsAirline ATA System Code (Discrepancy/Symptom)Airline ATA System Code (Maintenance Action)Aircraft Message CodeAircraft Message TextArrival Station CodeDeparture Flight NumberScheduled Departure TimeActual Departure TimeActual Arrival DateScheduled Arrival TimeActual Arrival TimeMaintenance Notified TimeMaintenance Released TimeMaintenance Total DowntimeDelay IndicatorCancellation IndicatorDiversion IndicatorAir Turnback IndicatorGeneral Air Interrupts IndicatorAborted Take-off IndicatorReturn To Gate IndicatorGeneral Ground Interrupt IndicatorDelay TimeAborted Approach IndicatorEmergency Descent IndicatorIn-Flight Shutdown IndicatorSubstitute Aircraft IndicatorAircraft on Ground IndicatorService Interruption Chargeability IndicatorSuspected Maintenance Error IndicatorSuspected Operational Error IndicatorTechnical Incident IndicatorREADI Exclusion Indicator (Reference READI Group)Incident Cause CodeConsequential Incident Cause CodeAircraft Event TextAircraft Event Text (Corrective Action)Comment TextLogbook Record IdentifierInstall Date of Removed PartRemoved Part Manufacturer CodeRemoved Part Manufacturer NameRemoved Manufacturer Full Length Part NumberRemoved Manufacturer Serial Number

Component Removal RecordOPERATOR CODEAIRFRAME MANUFACTURER CODEAIRCRAFT MODELAIRCRAFT SERIESAIRCRAFT MANUFACTURER SERIAL NUMBERAIRCRAFT REGISTRATION NUMBEROPERATOR AIRCRAFT INTERNAL IDENTIFIEREVENT RECORD IDENTIFIERAIRCRAFT ENGINE MODELENGINE SERIAL NUMBERENGINE POSITION CODEAIRCRAFT APU MODELAIRCRAFT APU SERIAL NUMBERREMOVED LRU RECORD IDENTIFIERREMOVAL DATEREMOVAL TYPE CODEREMOVAL TYPE TEXTREMOVED PART MANUFACTURER CODEREMOVED MANUFACTURER PART NUMBERREMOVED MANUFACTURER SERIAL NUMBERREMOVAL REASON TEXTENGINE/APU POSITION IDENTIFIERPART POSITIONREMOVED OPERATOR PART NUMBERREMOVED OPERATOR SERIAL NUMBERSUPPLIER CODEAIRLINE ATA SYSTEM CODEREMOVAL STATION CODEAIRCRAFT MESSAGE CODEAIRCRAFT MESSAGE TEXTMAINTENANCE ACTION TEXTAIRCRAFT CUMULATIVE TOTAL FLIGHT HOURSAIRCRAFT CUMULATIVE TOTAL CYCLESENGINE CUMULATIVE HOURSENGINE CUMULATIVE CYCLESAPU CUMULATIVE HOURSAPU CUMULATIVE CYCLESLOGBOOK RECORD IDENTIFIERMAINTENANCE ACTIONEVENT RECORD IDENTIFIERSCHEDULED MAINTENANCE IDENTIFIERTIME CYCLE REFERENCE CODEOPERATING TIMEOPERATING CYCLE COUNTOPERATING DAY COUNTNHA PART MANUFACTURER CODENHA MANUFACTURER PART NUMBERNHA PART NAMENHA OPERATOR PART NUMBERNHA OPERATOR SERIAL NUMBERSUPPLIER CODEINSTALLED DATEINSTALLED PART MANUFACTURER CODEINSTALLED PART MANUFACTURER NAMEINSTALLED MANUFACTURER SERIAL NUMBERINSTALLED OPERATOR PART NUMBERINSTALLED OPERATOR SERIAL NUMBERSUPPLIER CODETime since newCycles since newTime since overhaulCycles since overhaulTime since repairCycles since repairTime since last installationCycles since last installation

Scheduled Maintenance RecordOPERATOR CODEINSPECTION METHOD DESCRIPTIONCORROSION TEMPORARY PROTECTION SYSTEM VISIBLEINDICATORAIRFRAME MANUFACTURER CODEMAINTENANCE EMPLOYEE SKILL CODECOMMENT TEXTAIRCRAFT MODELTASK LABOR COUNTNON ROUTINE TASK LABOR COUNTAIRCRAFT SERIESTASK TOTAL LABOR HOURSNON ROUTINE TASK TOTAL LABOR HOURSAIRCRAFT MANUFACTURER SERIAL NUMBERTASK ELAPSED TIMENON ROUTINE TASK ELAPSED TIMEAIRCRAFT REGISTRATION NUMBERTASK MATERIAL COSTNON ROUTINE TASK MATERIAL COSTOPERATOR AIRCRAFT INTERNAL IDENTIFIERTASK TOTAL COSTNON ROUTINE TASK TOTAL COSTSCHEDULED MAINTENANCE IDENTIFIERINTERNATIONAL CURRENCYCMR/ALI ITEM NUMBEROPERATOR SPECIFIC TASK INDICATORMAINTENANCE FINDING INDICATORCMR/ALI ITEM TITLEAIRFRAMER MAINTENANCE TASK NUMBERMAINTENANCE FINDINGS DEFECT CODEPASSED CMR/ALI ITEM INDICATORMAINTENANCE REVIEW BOARD DOCUMENT NUMBER MAINTENANCE FINDINGS DEFECT DESCRIPTIONLOGBOOK RECORD IDENTIFIERAIRFRAMER MAINTENANCE TASK TITLEMAINTENANCE FINDINGS DEFECT TEXTMAINTENANCE ACTION TRACKING NUMBERAIRFRAMER TASK CARD/AMM REFERENCE NUMBER NON ROUTINE TASK REFERENCEMAINTENANCE ACTION LABOR COUNTAIRFRAMER TASK CARD TITLENON ROUTINE TASK REFERENCE DESCRIPTIONMAINTENANCE ACTION TOTAL LABOR HOURSOPERATOR MAINTENANCE TASK NUMBERNON ROUTINE CORRECTIVE ACTION TAKEN TEXTMAINTENANCE ACTION ELAPSED TIMEOPERATOR MAINTENANCE TASK NUMBER TITLEMAINTENANCE TASK OUT-OF-SCOPE FINDING INDICATORMAINTENANCE ACTION MATERIAL COSTTASK START DATEMAINTENANCE TASK OUT-OF-SCOPE FINDING DESCRIPTION MAINTENANCE ACTION TOTAL COSTTASK END DATECORROSION LEVELINTERNATIONAL CURRENCYOPERATOR MAINTENANCE CHECK IDENTIFIERCORROSION TYPE CODEREMOVAL DATEOPERATOR MAINTENANCE CHECK INTERVALCORROSION TYPE DESCRIPTIONREMOVED PART MANUFACTURER CODEOPERATOR MAINTENANCE TASK INTERVAL NUMBER REPAIR APPROVAL REFERENCEREMOVED MANUFACTURER PART NUMBERAIRCRAFT CUMULATIVE TOTAL FLIGHT HOURSAIRFRAME MANUFACTURER MAINTENANCE ZONEREMOVED MANUFACTURER SERIAL NUMBERAIRCRAFT CUMULATIVE TOTAL CYCLESOPERATOR UNIQUE MAINTENANCE ZONEREMOVED PART POSITION RELATIVE TO POWER PLANT ORAPU.ENGINE CUMULATIVE HOURSAIRFRAME LEFT HAND/RIGHT HAND POSITION CODEPART POSITIONENGINE CUMULATIVE CYCLESAIRCRAFT FRAME IDENTIFIERREMOVAL REASON TEXTAPU CUMULATIVE HOURSAIRCRAFT RIB INDENTIFIERREMOVED OPERATOR PART NUMBERAPU CUMULATIVE CYCLESAIRCRAFT SPAR IDENTIFIERREMOVED OPERATOR SERIAL NUMBEROPERATING TIMEAIRCRAFT MODEL STRINGER IDENTIFIERSUPPLIER CODEOPERATING CYCLE COUNTAIRFRAME STATION IDENTIFIERINSTALLED DATEOPERATING DAY COUNTAIRFRAME STATION DESCRIPTIONINSTALLED PART MANUFACTURER CODEPREVIOUS INSPECTION DATEAIRFRAME VERTICAL REFERENCE NUMBERINSTALLED MANUFACTURER PART NUMBEROPERATOR JOB CARD NUMBERAIRFRAME LONGITUDINAL REFERENCE NUMBERINSTALLED MANUFACTURER SERIAL NUMBEROPERATOR JOB CARD TITLEREPAIR STRUCTURAL MATERIAL TYPE DESCRIPTIONINSTALLED OPERATOR PART NUMBERINSPECTION METHOD CODECORROSION TEMPORARY PROTECTION SYSTEM INDICATOR INSTALLED OPERATOR SERIAL NUMBER

Shop Report RecordOPERATOR CODEAIRFRAME MANUFACTURER CODEAIRCRAFT MODELAIRCRAFT SERIESAIRCRAFT MANUFACTURER SERIAL NUMBERAIRCRAFT REGISTRATION NUMBEROPERATOR AIRCRAFT INTERNAL IDENTIFIERSHOP FINDINGS RECORD IDENTIFIERSHOP RECEIVED DATERECEIVED PART MANUFACTURER CODERECEIVED MANUFACTURER PART NUMBERRECEIVED MANUFACTURER SERIAL NUMBERSUPPLIER REMOVAL TYPE CODESUPPLIER REMOVAL TYPE TEXTFAILURE/ FAULT FOUNDFAILURE/ FAULT INDUCEDFAILURE/ FAULT CONFIRMS REASON FOR REMOVALFAILURE/ FAULT CONFIRMS AIRCRAFT MESSAGEFAILURE/ FAULT CONFIRMS AIRCRAFT PART BITEMESSAGEHARDWARE/ SOFTWARE FAILURERECEIVED OPERATOR PART NUMBERRECEIVED OPERATOR SERIAL NUMBERSUPPLIER CODEINCOMING MODIFICATION LEVELSHOP FINDINGS CODERELATED SHOP FINDING RECORD IDENTIFIERREPAIR LOCATION NAMEINCOMING INSPECTION TEXTSHOP ACTION TEXTSHOP REPAIR LOCATION CODEMOD (S) INCORPORATED (THIS VISIT) TEXTSHOP ACTION CODESHOP DISCLOSURE INDICATORSHIPPED DATESHIPPED PART MANUFACTURER CODESHIPPED MANUFACTURER PART NUMBERSHIPPED MANUFACTURER SERIAL NUMBERSHIPPED OPERATOR PART NUMBERSHIPPED OPERATOR SERIAL NUMBERSHIPPED MODIFICATION LEVELREMOVAL DATEREMOVAL TYPE CODEREMOVAL TYPE TEXTREMOVED PART MANUFACTURER CODEREMOVED MANUFACTURER PART NUMBERREMOVAL REASON TEXTREMOVED OPERATOR PART NUMBERREMOVED OPERATOR SERIAL NUMBERREMOVAL TRACKING IDENTIFIERSHOP TOTAL LABOR HOURSSHOP FLOW TIMESHOP MATERIAL COSTREPAIR PRICE AMOUNTINTERNATIONAL CURRENCY

Logbook Record (Pireps/Mareps)OPERATOR CODEAIRFRAME MANUFACTURER CODEAIRCRAFT MODELAIRCRAFT SERIESAIRCRAFT MANUFACTURER SERIAL NUMBERAIRCRAFT REGISTRATION NUMBEROPERATOR AIRCRAFT INTERNAL IDENTIFIERAIRCRAFT ENGINE TYPEENGINE POSITION CODEENGINE SERIAL NUMBERAIRCRAFT ENGINE MODELAIRCRAFT APU TYPEAIRCRAFT APU SERIAL NUMBERAIRCRAFT APU MODELAIRCRAFT APU MANUFACTURER CODELOGBOOK RECORD IDENTIFIERMAINTENANCE TRACKING IDENTIFIERMAINTENANCE ACTION SEQUENCE NUMBERDISCREPANCY OCCURRENCE DATEDISCREPANCY ORIGINATION TYPE CODEMAINTENANCE TYPE CODEDEPARTURE / REPORTING STATION CODEMAINTENANCE ACTION DATEMAINTENANCE ACTION COMPLETION DATEMAINTENANCE ACTION STATION CODEMAINTENANCE ACTION STATUS CODETECHNICAL INCIDENT INDICATORETOPS FLIGHT INDICATORDEPARTURE FLIGHT NUMBERDEPARTURE DATEDEPARTURE TIMEARRIVAL STATION CODEAIRLINE ATA SYSTEM CODE (DISCREPANCY/SYMPTOM)AIRCRAFT MESSAGE CODEAIRCRAFT MESSAGE TEXTAIRLINE ATA SYSTEM CODE (MAINTENANCE ACTION)MAINTENANCE ACTION COMPLETION TIMEMAINTENANCE ACTION DEFERRAL REASON TEXTAUTHORITY DOCUMENT REFERENCE NUMBERDELAY TIME (TECHNICAL DELAYS)MAINTENANCE ACTION CODEDISCREPANCY SYMPTOM CODEFINDINGS TYPE CODEPHASE OF FLIGHTWORK REQUESTED DESCRIPTIONDISCREPANCY TEXTMAINTENANCE ACTION TEXTCOMMENT TEXTScheduled Maintenance IdentifierMAINTENANCE ACTION LABOR COUNTMAINTENANCE ACTION TOTAL LABOR HOURSMAINTENANCE ACTION ELAPSED TIMEMAINTENANCE ACTION MATERIAL COSTMAINTENANCE ACTION TOTAL COSTINTERNATIONAL CURRENCYSERVICE BULLETIN/ LETTER NUMBERMAINTENANCE CHECK IDENTIFIERMAINTENANCE CHECK INTERVALNON ROUTINE TASK REFERENCENON ROUTINE TASK REFERENCE DESCRIPTIONOPERATOR MAINTENANCE TASK NUMBEROPERATOR JOB CARD NUMBERAIRFRAMER MAINTENANCE TASK (MPD ITEM) NUMBERMAINTENANCE REVIEW BOARD DOCUMENT NUMBERAIRFRAMER TASK CARD/AMM REFERENCE NUMBERAIRWORTHINESS DIRECTIVE NUMBER

Companies that Intend to Comply with SPEC2000 Chapter 11 by 2011 AirbusBoeingBombardierDassaultEmbraer Air CanadaContinentalDeltaFedEx (plus or minus mid 2008)Lufthansa TechnikSASTurkish AirlinesVirgin Atlantic AirwaysWestJet BAE SystemsC&D AerospaceGoodrich Wheels and BrakesHamilton well CollinsSmithsThales EdatasystemsEmpowerMXMIROMaintenix (MXi)RussellAdamsSAP (2010)Swiss Aviation Software (AMOS)TeradataTRAXUltramain

It is the goal of SPEC2000 Chapter 13 to standardize thedefinitions of reliability metrics and so as to indicate the use ofreliability data as collected in Chapter 11SPEC2000 Chapter 13-2 ReliabilityMetrics

Chapter 13-2 Reliability Metrics4.1 Dispatch Metrics Technical Dispatch Reliability (TDRL) Technical Dispatch Interruption Rate (TDIR) Schedule Reliability (SREL) Schedule Interruption Rate (SIRT) Technical Cancellation Performance (TCPF) Technical Cancellation Rate (TCNR) Technical Completion Rate (TCRT) Technical Non-Completion Rate (TNCR)

Chapter 13-2 Reliability Metrics4.2 Service Difficulty MetricsAircraft Incidents are events that cause technical service difficulties such as aborted takeoffs, air turnbacks, emergency landings, etc. The metrics herein are based on such incidentsIncident Rate 1000 * (Incident Count) / (total actual departures for the sameperiod) gives incidents per 1000 departures. Diversion Rate (DVRT)Air Turnback Rate (ATBR)Aborted Takeoff Rate (ABTR)Return to Gate Rate (RTGR)Aborted Approach Rate (ABAR)Emergency Descent Rate (EMDR)Inflight Shutdown Rate (IFSDR)Total Air Incident Rate (TAIR)Total Incident Rate (TINR)

Chapter 13-2 Reliability MetricsComponent ReliabilityMCBR / MTBRMCBUR / MTBURREMOVALUnit removed from an aircraftfor a shop actionUNSCHEDULED REMOVALKnown or suspected malfunctionSCHEDULED REMOVALTo perform maintenance, toretain in a serviceable conditionFAILURE / FAULT JUSTIFIED REMOVALMCBF / MTBF ('J')MCBF / MTBF ('N')MCBF / MTBF ('C')FAILURE / FAULTFailure / Fault found whether or notthe failure substantiates the reasonfor removalFAILURE / FAULT(Non-Induced)Unit used within specificationFAILURE / FAULT(Confirmed)Failure / Fault Found whichsubstantiates the reason forremovalUNJUSTIFIED REMOVALNo Failure / No Fault FoundNFFFAILURE / FAULT(Induced)Unit used out of specificationFAILURE / FAULT(Unconfirmed)Failure / Fault Found whichdoes not substantiate thereason for removalMTBFJ JUSTIFIEDN NON-INDUCED OR NETC CONFIRMED

Chapter 13-2 Reliability Metrics4.3 Component Reliability Metrics Mean Time Between Removal - MTBR Mean Time Between Unscheduled Removals - MTBUR Mean Time Between [All] Unscheduled Removals - MTBUR Mean Time Between [Non-induced] Unscheduled Removals – MTBUR(N) Mean Time Between Failure - MTBF Mean Time Between Failure - Justified – MTBF(J) Mean Time Between Failure – Non-Induced – MTBF(N) Mean Time Between Failure – Confirmed – MTBF(C) Mean Cycles Between Removals – MCBR Mean Cycles Between Unscheduled Removals - MCBUR Mean Cycles Between [All] Unscheduled Removals - MCBUR Mean Cycles Between [Non-induced] Unscheduled Removals – MCBUR(N) Mean Cycles Between Failure - MCBF Mean Cycles Between Failure - Justified – MCBF(J) Mean Cycles Between Failure – Non-Induced – MCBF(N) Mean Cycles Between Failure – Confirmed – MCBF(C)

Chapter 13-2 Reliability Metrics4.3 Component Reliability Metrics – cont. No Fault Found Rate Fault Found Ratio (FFRT) – FFRTj, FFRTn, FFRTc Mean Time To Failure (MTTF) – MTTF(J), MTTF(N), MTTF(C) Mean Time To Unscheduled Removal (MTTUR) Unscheduled Removal Rate (URR): URRH (in FH), URRC (in cycles) Time Since Installation at Removal (TSR) Time Since Repair (TSRP) Time Since Overhaul (TSO) Time Since New (TSNW) Mean Cycles To Failure (MCTF) – MCTF(J), MCTF(N), MCTF(C)Mean Cycles To Unscheduled Removal (MCTUR)Cycles Since Installation at Removal (CSI)Cycles Since Repair (CSRP)Cycles Since Overhaul (CSO)Cycles Since New (CSNW)

Chapter 13-2 Reliability MetricsLogbook

Chapter 13-2 Reliability Metrics4.4 Logbook Rates Snag Report Rate (SRRT) SRRTh 1000{(logbook count for all snags)/(total flight-hours for the sameperiod) SRRTc 100{(logbook count for all snags)/( total actual departures for thesame period) Pirep Rate (PRRT) PRRTh, PRRTc Pilot Initiated Log Rate (PILR) PILRh, PILRc Cabin Log Rate (CLRT) CLRTh, CLRTc Cargo Log Rate (CGLR) CGLRh, CGLRc Maintenance Reports [Marep] Rate (MRRT) MRRTh, MRRTc

Chapter 13-2 Reliability Metrics - What’s Next?Dispatch Availability (DA)Purpose: To measure the percentage of time that an aircraft is available for use.It takes into account all downtime due to unscheduled maintenance even if asubstitute aircraft is used to cover for the aircraft with technical problems.Example: An aircraft is planned for use 16 hours a day for a month. In that time ithas technical problems which keep it unavailable for use for a total of 20 hours inthe month.DA {16 * 30 – 20}/{16*30} 95.8%***Metric still in development***

Chapter 13-2 Reliability Metrics - What’s Next? Schedule Completion Rate - SCR(/Technical Regularity Rate-TRR) Schedule Completion Rate is the percentage of scheduled revenue departures that donot incur a primary technical cancellation or a follow-on cancellations thereof. On-Time Departure Performance (OTDP) On-Time Performance is the percentage of performed revenue departures that do notincur a primary technical delay. Failure Hours Rate - FHR There are three types of FHR’s : FHR-justified; FHR-non-induced; and FHR-confirmed. Note: FHR 1000/MTBF Failure Cycles Rate – FCR***Metrics still in development***

Chapter 13-2 Reliability Metrics - What’s Next? Mean Time Since Installation (MTSI) A component performance rate calculated by taking the average hours on componentswhen they were removed for scheduled or unscheduled reasons. Mean Cycles Since Installation (MCSI) Mean Time To Repair (MTTR) Average Flight-Hours Per Aircraft Per Day (AFHPAC) Average Cycles Per Aircraft Per Day (ACPAC) Average Duty Hours Per Aircraft Per Day (ADHPAC) Duty-Hours is defined as: Flight-Hours Taxi Time Active Turned Around Time***Metrics still in development***

Conclusion – The Challenge This specification indicates the direction of the industry. Operators do not change their systems frequently. The challenge is tomake operators see the value of using SPEC2000 Ch 11 at their nextupdate. Airframers have jointly championed the rapid implementation ofSPEC2000 Chapter 11 throughout industry. The RIG has worked with several software companies to ensurespecification will be incorporated in whichever software third-partyprovider operators may choose. The challenge is for softwarecompanies to see the value in incorporating Ch 11 in their standardsoftware. Many suppliers have taken part in developing these specs. Theirchallenge is to spread the news within their own companies.The expanded set of data elements will improve the quality of theresponse that the airframer and supplier can provide to operators.

Conclusion - An Opportunity for Growth Chapter 11 was a large step in helping the industry grow. The definitions of important data provided reliability and maintenanceengineers/analysts with some clues as to how to improve their aircraftproductivity and how to optimize/evolve maintenance.With Chapter 13 the industry has explored and developed metrics thatdifferentiate between aircraft reliability, component reliability and aircraftproductivity. These metrics help understand the problems that cause delays and thosethat cause large downtime. Another strength of Ch 13 is that it will assist academic institutions tounderstand the industry better and so to develop analysis methods toimprove service.The ultimate beneficiary is the traveller who obtains more reliable andcheaper service.

Questions?

SPEC2000 Chapter 11/13 - Overview SPEC2000 Chapter 11 – “Aircraft Reliability Data Collection and Exchange”, has been part of ATA Spec2000 since May 2004 It was endorsed by IATA for use by it’s members in January 2005 Called out in ISO STEP 10303 / AP 239 PLCS It is now being refined as operators use it. SPEC2000 Chapter 13 - Performance Metrics Standards.

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