ISO INTERNATIONAL STANDARD 22089 First edition 2009-02-15 Aerospace Hydraulic power transfer units General specifications Aéronautique Unités de transfert de puissance hydraulique - Spécifications genérales Reference number ISO 22089:2009(E) @ ISO 2009 y IHS under ted without license from IHS Not for Resale ISO 22089:2009(E) Contents Page Foreword. Introduction vi 1 Scope 2 Normative references. 3 Terms and definitions.. 4 Classification..... 8 5 General requirements. 9 5.1 General. 5.2 Hydraulic system characteristics. 9 5.3 Airworthiness requirements..... 10 5.4 Qualification... 10 6 Functional requirements. 10 6.1 Hydraulic fluid .. 10 6.2 PTU pump/motor displacement.. 10 6.3 11 6.4 PTU pump pressure. 12 6.5 Motor pressure. 14 6.6 Case drain pressures 14 6.7 Flows... 14 6.8 Leakage. 15 6.9 Speed and direction of rotation.. 16 6.10 18 6.11 Control 18 6.12 Rated temperature 21 6.13 Acoustic noise level . 21 6.14 Endurance .... 21 6.15 Environmental requirements ... 22 7 Detail design requirements.... 22 7.1 Dimensionally critical components 22 7.2 22 7.3 Seals.. 23 7.4 Lubrication ... 23 7.5 Balance 23 7.6 System separation/rip-stop 7.7 Driveshaft... 23 7.8 Self-contained failure . 23 7.9 Safety wire sealing...... 23 7.10 Electro-conductive bonding 23 7.11 Marking. 24 8 Strength requirements 24 8.1 Pressure loads . 24 8.2 Proof pressures ... 8.3 Burst pressure .. 25 8.4 Pressure impulse (fatigue) 26 8.5 Pressure and structural load .26 8.6 Port strength Copyrght InternationalOrganizaisadardizaoghtsreserved ili nse from IHS Not for Resale ISO 22089:2009(E) 9 Construction... 9.1 Materials. .26 9.2 Corrosion protection .27 9.3 28 10 Installation requirements .28 10.1 Dimensions ... ..28 10.2 Mass ..28 10.3 Mounting 28 10.4 Ports 11 Maintenance..... 11.1 Maintenance concept... .28 11.2 Service life limitations and storage specifications.. .28 12 Reliability ..29 12.1 Equipment compliance. 29 12.2 13 Quality assurance provisions ..... 13.1 Responsibilityfor inspection.. .29 13.2 Classification of tests. .29 13.3 Test stand requirements. ..29 14 Acceptancetests.. .30 14.1 ...30 14.2 Examination of the product.. ..30 14.3 Test programme and inspection methods . .30 15 Qualification tests 15.1 15.2 Qualification procedure. ..35 @Iso2009-All rights reserved se from IHS Not for Resale