Downloaded from https://www.everyspec.com ADS-79D-HDBK CONTENTS PARAGRAPH PAGE FOREWORD ...................................................................................................................... ii 1.
SCOPE ...............................................................................................................................1 1.1 Scope ...............................................................................................................................1 2 REFERENCES AND APPLICABLE DOCUMENTS ........................................................2 2.1 General ..................................................................................................................2 2.2 Government Documents ........................................................................................2 2.3 Other Government Documents, Drawings, and Publications ................................2 2.4 Non-Government Publications ..............................................................................2 2.5 Other Government and Non-Government Guidance Documents .........................3 3 DEFINITIONS .....................................................................................................................5 3.1 Acronyms ..............................................................................................................8 3.2 Condition-based maintenance probability parameter definitions ........................13 4 GENERAL GUIDANCE ...................................................................................................14 4.1 Background ..........................................................................................................14 4.2 Universal Guidance .............................................................................................15 4.2.1 Embedded diagnostics/prognostics .....................................................................16 4.2.2 Fatigue damage monitoring .................................................................................17 4.2.3 Regime recognition (usage detection) .................................................................17 4.2.4 Remediation of fatigue sensitive components .....................................................18 4.2.5 Ground based equipment and information technology .......................................18 5 DETAILED GUIDANCE ..................................................................................................20 5.1 External systems ..................................................................................................20 5.2 Technical displays and technical information presentation .................................20 5.3 Data acquisition (DA) ..........................................................................................21 5.3.1 Data collection .....................................................................................................21 5.4 Data Manipulation (DM) .....................................................................................22 5.5 State Detection .....................................................................................................22 5.6 Health Assessment (HA) .....................................................................................23 5.7 Prognostics assessment (PA) ...............................................................................23 5.8 Advisory generation (AG) ...................................................................................24 5.9 Guidelines & alternatives for modifying maintenance on legacy aircraft ...........24 5.9.1 Enhancing current maintenance with CBM on legacy aircraft ...........................25 5.9.2 Modifying or replacing overhaul intervals on legacy aircraft .............................25 5.9.3 Transitioning to on-condition maintenance for legacy aircraft ...........................26 5.9.3.1 Seeded fault testing ..............................................................................................27 5.9.3.2 Field fault analysis ...............................................................................................27 5.9.3.3 Alternatives to transitioning to on-condition for legacy aircraft .........................27 5.9.4 Statistical considerations .....................................................................................28 5.10 CBM management plan .......................................................................................28 6 HOW TO USE THIS ADS ................................................................................................29 6.1 CBM for legacy aircraft .......................................................................................29 6.2 CBM for new developmental systems .................................................................32 iv