INLET BARRIER FILTER SYSTEM - Donaldson

Document Number: AFS-AS350B-IBF-ICARevision:FDate:March 26, 2014INSTRUCTIONS FOR CONTINUED AIRWORTHINESSINLET BARRIER FILTER SYSTEMfor theEurocopter FranceAS350B Series HelicoptersFAA STC No. SR02393CH17891 Chesterfield Airport RoadChesterfield, MO 63005COPYRIGHT 2006Aerospace Filtration Systems, Inc.UNPUBLISHED — ALL RIGHTS RESERVEDLIMITED and/or RESTRICTED RIGHTS NOTICEThis document, along with its drawings and photographs, contains Trade Secrets and/or Commercial orFinancial Information that is proprietary to Aerospace Filtration Systems, Inc. (AFS) under 5 USC 552 asamended, and is Prohibited from Public Disclosure by 18 USC 1905. Do not duplicate or disclose outsidethe U.S. Government without the express written permission of Aerospace Filtration Systems, Inc.The Government's rights to use, modify, reproduce, release, perform, display, or disclose these technicaldata are restricted to the purpose of evaluating AFS’s design for FAA commercial certification andairworthiness consideration only. Any reproduction of technical data or portions thereof marked with thislegend, or referring to this legend, must also reproduce the markings and legend. Any person, other than theGovernment, who has been provided access to such data must promptly notify: Aerospace FiltrationSystems, Inc., Attn: Business Manager, 17891 Chesterfield Airport Road, Chesterfield, MO 63005The data subject to this limited/restricted rights notice is contained on all pages.

AFS-AS350B-IBF-ICARevision: FAerospace Filtration Systems, Inc.Proprietary InformationPROPRIETARY DATA STATEMENTThis data, excluding Chapter 4, Airworthiness Limitations, are proprietary toAerospace Filtration Systems, Inc. Disclosure, reproduction, or use ofthese data for any purpose other than helicopter operation and/ormaintenance is forbidden without prior written authorization fromAerospace Filtration Systems, Inc.EFFECTIVITYEffectivity for this ICA is for all Eurocopter model AS350B serieshelicopters with the Aerospace Filtration Systems, Inc. (AFS) Inlet BarrierFilter (IBF) System installed.Use or disclosure of this material is subjectto the restrictions on the title pageiAFS Eurocopter AS350 IBFInstructions for Continued Airworthiness

AFS-AS350B-IBF-ICARevision: FAerospace Filtration Systems, Inc.Proprietary InformationLOG OF REVISIONSRevision No.Revision DescriptionRelease DateIRInitial ReleaseMarch 15, 2007AUpdated to reflect revision of the filters assembly.Airworthiness Limitation (Section 2) is unaffected by this revision.October 1, 2007BAdded -103 to Appendix AAirworthiness Limitation (Section 2) is unaffected by this revision.May 5, 2008CAdded details for 112300-105 Filter Assy and 112004-101 Interface KitJuly 30, 2010DChanged Logo and Address on Front PageFeb 22, 2011ECorrected P/N in Appendix AMay 3, 2013FRevised amount of filter oil to be applied to the filter, updated oil and cleanercalloutsUse or disclosure of this material is subjectto the restrictions on the title pageiiiMarch 26, 2014AFS Eurocopter AS350 IBFInstructions for Continued Airworthiness

AFS-AS350B-IBF-ICARevision: FAerospace Filtration Systems, Inc.Proprietary InformationINSTRUCTIONS FOR CONTINUED AIRWORTHINESSFor the Aerospace Filtration Systems Engine Inlet Barrier Filter SystemInstalled on the Eurocopter France Model AS350B series HelicoptersTable of Contents1INTRODUCTION . 11.11.21.31.41.51.61.71.81.91.101.112AIRWORTHINESS LIMITATIONS . 92.12.22.32.43SCOPE OF THIS MANUAL . 1USE OF THIS MANUAL . 1DEFINITIONS / TERMINOLOGY . 1ACRONYMS . 3WARNINGS, CAUTIONS, AND NOTES . 4UNITS OF MEASURE. 4REFERENCE PUBLICATIONS . 4LIST OF APPLICABLE PUBLICATIONS . 4DISTRIBUTION OF CHANGES . 5INDICATION OF CHANGES . 5SYSTEM DESCRIPTION AND OVERVIEW . 5FAA APPROVAL BLOCK . 9GENERAL . 10FILTER RETIREMENT LIFE . 10LIFE LIMITED COMPONENTS . 10INSPECTION REQUIREMENTS AND OVERHAUL. 113.1INSPECTION REQUIREMENTS . 113.1.1 GENERAL REQUIREMENTS . 113.1.2 FILTER ASSEMBLY INSPECTION . 113.1.3 STRUCTURAL COMPONENT INSPECTIONS . 123.1.4 SYSTEMS AND ELECTRICAL COMPONENT INSPECTIONS . 123.1.5 IBF BYPASS COCKPIT SWITCH FUNCTION CHECK . 123.2OVERHAUL REQUIREMENTS. 134ACCESS PANELS . 164.14.24.35STORAGE . 175.16STORAGE. 17PLACARDS, DATA PLATES, AND MARKINGS . 186.16.26.37GENERAL DESCRIPTION . 16ACCESS FOR FILTER SERVICING . 16ACCESS FOR MAINTENANCE . 16MARKING – PART NUMBER / PMA / SERIALIZATION . 18DATA PLATE – FILTER ASSEMBLY. 18PLACARDS / MARKINGS - COCKPIT . 18SERVICING . 197.1AUTHORIZED MATERIALS . 197.2FILTER SERVICE INTERVALS . 197.2.1 GENERAL REQUIREMENTS . 197.2.2 PREPARED FIELD OPERATIONS . 207.2.3 SEVERE ENVIRONMENT OPERATIONS . 217.3FILTER ASSEMBLY SERVICING. 21Use or disclosure of this material is subjectto the restrictions on the title pageivAFS Eurocopter AS350 IBFInstructions for Continued Airworthiness

AFS-AS350B-IBF-ICARevision: F7.3.17.3.27.3.37.3.47.47.57.67.78FILTER PRE-CLEANING . 21FILTER CLEANING. 21FILTER DRYING . 22FILTER OILING. 23STRUCTURAL COMPONENT SERVICING . 24SYSTEMS AND ELECTRICAL SERVICING. 25ENGINE WATER WASH . 25AIRCRAFT WASHING . 25TROUBLESHOOTING AND MAINTENANCE . .9.19Aerospace Filtration Systems, Inc.Proprietary InformationMAINTENANCE GENERAL . 26COMPONENTS - GENERAL DESCRIPTION . 27FILTER ASSY / FILTER SEAL . 27STRUCTURAL COMPONENTS . 27SYSTEMS AND ELECTRICAL COMPONENTS . 27FILTER ASSY / FILTER SEAL. 28FILTER ASSY . 28FILTER SEAL . 32STRUCTURAL COMPONENTS . 33EUROCOPTER AS350 SERIES AIR INDUCTION COWLING . 33BYPASS DOOR . 34BYPASS DOOR SEAL . 35UPPER FAIRING ASSEMBLY . 36SYSTEMS AND ELECTRICAL COMPONENTS . 38COCKPIT SWITCH/INDICATOR . 38DIFFERENTIAL PRESSURE SWITCH . 39FILTER MAINTENANCE AID . 43ACTUATOR. 46WIRING, WIRING HARNESS, CONNECTORS, BACKSHELLS, CIRCUIT BREAKER, RELAY . 50FASTENER LISTING. 51PROTECTIVE TREATMENT . 51TROUBLESHOOTING GUIDE . 53SPECIAL TOOLS / SPECIAL EQUIPMENT . 1CONSUMABLE MATERIALS, SUPPLIES, AND PROTECTIVE TREATMENT SPECIFICATIONS . 1ICA APPENDIX A – ILLUSTRATED PARTS BREAKDOWN . A-2Use or disclosure of this material is subjectto the restrictions on the title pagevAFS Eurocopter AS350 IBFInstructions for Continued Airworthiness

AFS-AS350B-IBF-ICARevision: FAerospace Filtration Systems, Inc.Proprietary InformationTable of PicturesPicture 1: FMA Operation . 14Picture 2: FMA Reset Location . 14Picture 3: Cockpit Switch/Indicator . 18Picture 4: Circuit Breaker . 18Picture 5: Oiling Filter Media . 24Picture 6: Hand Seamer Used to Straighten or Crimp Pleats. 30Picture 7: Test Setup with Manometer. 42Picture 8: FMA Operation . 44Picture 9: FMA Location . 45Table of TablesTable 1: Inspection Intervals . 15Table 2: Protective Treatment for Components . 52Table 3: Troubleshooting Guide . 53Table 4: Consumable Materials, Supplies and Protective Treatment Specifications . 1Table of FiguresFigure 1: IBF System Installation . 7Figure 2: Filter Assembly Data Plate . 18Figure 3: Test Equipment Setup . 42Use or disclosure of this material is subjectto the restrictions on the title pageviAFS Eurocopter AS350 IBFInstructions for Continued Airworthiness

AFS-AS350B-IBF-ICARevision: FAerospace Filtration Systems, Inc.Proprietary Information1INTRODUCTION1.1SCOPE OF THIS MANUALThese Instructions for Continued Airworthiness (ICA) provide the information required to performthe maintenance and repair of the Aerospace Filtration Systems, Inc. (AFS) Inlet Barrier Filter(IBF) system installation on the Eurocopter Model AS350 series helicopters. The ICA should beused in conjunction with all pertinent Eurocopter Model AS350 series manuals and all publicationslisted in the List of Applicable Publications (LOAP).NOTEThoroughly review and become familiar with the Appendix A –Illustrated Parts Breakdown section of this ICA before performingmaintenance on the IBF system.1.2USE OF THIS MANUALThe instructions that are given in this manual and those that have been changed by revisions,bulletins and/or alerts issued by AFS, Eurocopter or the Airworthiness Directives issued by thelocal Aviation Authority, shall be strictly followed.1.3DEFINITIONS / TERMINOLOGYActuatorAn electromechanical actuator used to open / close the bypass door.Air induction screenScreen installed in the engine inlet on baseline configuration aircraftin lieu of the Sand Filter or the IBF, to prevent engine foreign objectdamage.Air induction cowlingThis cowling houses the major kit components including the IBFfilter assembly, adaptor frame, bypass door assembly and associatedwiring.BrownoutA brownout condition is a zero visibility condition usually caused byhovering in a dusty environment.BypassThe bypass is an alternate air inlet used only when the main engineair inlet through the filter becomes clogged or blocked.Bypass doorDoor is located just aft of the filter that when opened by the actuatorallows unfiltered air to be drawn into the engine.Use or disclosure of this material is subjectto the restrictions on the title page1AFS Eurocopter AS350 IBFInstructions for Continued Airworthiness

AFS-AS350B-IBF-ICARevision: FAerospace Filtration Systems, Inc.Proprietary InformationCockpit switch/indicatorA push button switch, labeled “IBF”, is used to OPEN or CLOSE thebypass door. This switch is normally CLOSED and is depressed tothe OPEN position only when the cockpit indicator, an ambercaution “FILTER” light in the switch, illuminates.The “FILTER” portion of the switch illuminates any time thedifferential pressure reaches or exceeds a preset value.The “BYPASS” portion of the switch illuminates when the door iscompletely open.Differential pressureDrop in pressure across the filter assembly, which is measured by thedifferential pressure switch and the filter maintenance aid.Delta P switchDifferential pressure switch.FilterBarrier type filter media made of multi-layers of cotton gauzesaturated with specially formulated oil that forms a tack barrier thatincreases the capture efficiency of the filter.Filter assemblyFilter media supported by pleated stainless steel screen on both sidesand the filter assembly frame components around the perimeter ofthe filter media.Filter assembly frameStructure that frames, retains, and seals the outside edges of the filtermedia.Filter downstream sideClean side of the filter media (i.e. the side of the filter facingd

used in conjunction with all pertinent Eurocopter Model AS350 series manuals and all publications listed in the List of Applicable Publications (LOAP). NOTE Thoroughly review and become familiar with the Appendix A – Illustrated Parts Breakdown section of this ICA before performing maintenance on the IBF system. 1.2 USE OF THIS MANUAL The instructions that are given in this manual and those .