Meeting Component Reliability Demands of the Aerospace Industry ...

Acronyms• Block Test or Type Test: 150 hours endurancecertification test• CTQ: Critical to Quality, key characteristic• DFSS : Design For Six Sigma• DOA : Design Organization Approval• EASA: European Aviation Safety Agency• ETOPS: Extended Twin Engines Operations, usedto indicate Civil Airworthiness Authority approvalto allow a twin engine commercial passengeraircraft to be at any time a certain number offlying minutes away from a suitable landing field.• FAA: Federal Aviation Administration• FMEA: Failure Malfunction and Effect Analysis,carried out at system and component level sinceconcept design• FRACAS : Failure Reporting, Analysis andCorrective Action System is a mean to improvethe product reliability during the developmentphase. To achieve this, FRACA is a closed-loopprocess that feeds back development experienceinto the product design. This process applies todevelopment build, strip and test including flighttest of engines, parts and accessories (includingsoftware) in support of the development of aproduct.• HUMS: Health and Usage Monitoring System• IFSD : In-Flight Shut Down© Avio SpA - 2009• IMI: Initial Maintenance Inspection test.This is a test that simulates the conditions inwhich the engine is expected to operate inservice, including start stop cycles, toestablish when the initial maintenanceinspection is required. The test must beaccomplished on an engine whichsubstantially conforms to the type design.• LH: Left Handed• MOA : Maintenance Organization Approval• MTBUR: Mean Time BeteweenUnscheduled Removal• MRO: Maintenance, Repair and Overhaul• NPI: New Product Introduction Process• PGB: Power Gearbox• PFMEA: Process Malfunction and EffectAnalysis, carried out on manufacturingprocess to identify risks for componentproducibility.• POA : Production Organization Approval• QFD: Quality Function Deployment• RH: Right Handed• TOW: Time On WingOct. 6th, 2009 23