Donaldson Bell 407/GX IBF
BELL 407 · Pilot's Operating Handbook
Overview
This document provides information on the Donaldson Inlet Barrier Filter (IBF) system designed for the Bell 407/GX helicopter. It details the system's design, benefits, operational considerations, and maintenance aids to enhance engine performance and protection against debris.
- The IBF system offers maximum engine debris protection.
- It improves airflow compared to traditional inertial designs.
- The filter assembly has a lifespan of 4,500 flight hours with regular cleanings.
- The IBF is lighter than the Engine Air Particle Separator (EAPS) by approximately 2 lbs.
- It is certified for flight in adverse weather conditions like snow.
- The system eliminates the need for engine bleed air maintenance.
- The IBF provides better separation efficiency than inertial separators.
- Common components are shared with other Donaldson IBF systems.
Document
Source
Originally published by donaldson.com. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type ·
- Pilot's Operating Handbook
- Year ·
- 2020
- File size ·
- 2.5 MB
- Publisher ·
- donaldson.com
- Language ·
- en
What is the Donaldson Bell 407/GX IBF?
The Donaldson Bell 407/GX IBF is a pilot's operating handbook for the BELL 407, dated 2020.
Where does the Donaldson Bell 407/GX IBF come from?
This copy of the Donaldson Bell 407/GX IBF was originally published by donaldson.com and is hosted on Sprinkle as a free, searchable reference copy.
What year was the Donaldson Bell 407/GX IBF published?
The Donaldson Bell 407/GX IBF — the BELL 407 pilot's operating handbook on file — is dated 2020.
Most owners only have the POH. Here's the essential set for the BELL 407.
- Pilot's Operating Handbook / AFM
- Checklist
- Maintenance Manual
- Parts Catalog (IPC)
- Systems & Wiring
- Service Bulletins on file
- Type Certificate (TCDS)
More BELL 407manuals & documents
In this document
IBF System Design
The IBF system is designed to be installed into the Bell fairing and utilizes EAPS mounting provisions.
Filter Bypass System
The bypass door can be commanded by the pilot to open, increasing engine airflow during debris conditions.
IBF Filter Maintenance Aid
The maintenance aid provides pre and post-flight indications of filter contamination and allows for condition-based maintenance.
IBF Benefits: Performance
The IBF system allows for consistent flight operations and extends engine time on wing, providing improved protection over inertial designs.
IBF Operational Considerations
The IBF is approved for installation on both aluminum and composite cowls and improves power margins for high/hot operations.
Comparative Benefits
The IBF system has significantly higher separation efficiency than inertial separators and does not require engine bleed air.
Safety notes
- Aircraft with particle separators must land immediately during heavy debris conditions.
- The IBF system is not compatible with EAPS for inlet air bypass system backup.
- The IBF is certified for flight in falling and blowing snow according to helicopter manufacturers' flight manual requirements.
Full document text
Donaldson Bell 407/GX IBF August 1, 2020 BELL 407/GX BELL 407 IBF SYSTEM DESIGN BELL 407 IBF SYSTEM DETAILS SHOWN INSTALLED INTO BELL FAIRING, LOOKING AFT. IBF UTILIZES EAPS MOUNTING PROVISION. FILTER ASSEMBLY BYPASS SYSTEM FILTER ACCESS DOOR OEM BELL FAIRING ACTUATOR WASH TUBE BELL 407 IBF FILTER BYPASS SYSTEM BYPASS DOOR Pilot commands the bypass door to open to increase engine airflow until clear of debris conditions . NOTE: Aircraft with particle separators must land immediately during heavy debris conditions and do not have the ability to keep flying like aircraft with a barrier filter bypass system. BELL 407 IVF FILTER The IVF filter was developed to prevent corrosion …. BELL 407 FILTER BYPASS AIR FLOW ENGINE FIREWALL ROLLS-ROYCE 350 ENGINE BYPASS DOOR FILTER Similar Bypass System as military qualified OH-58D and the certified Bell 206L-3/4 MAIN ROTOR MAST & TRANSMISSION FWD UP SECTION VIEW AT BL 0.00 IBF FILTER MAINTENANCE AID (FMA) • Pre and Post flight indication of filter contamination level and maximum pressure drop. • Allows flexibility for mission planning with predictable service cycles, particularly in high tempo desert environments. • Verification of post cleaning effectiveness IBF FILTER MAINTENANCE AID (FMA) • Provides the ability to meet Condition-Based Maintenance (CBM) between established cleaning intervals, eliminating unnecessary service. • Measures plenum pressure versus ambient, across the filter system. • Similar FMA used on other Donaldson IBFs for the Bell 205A, 206B, 206L-1/3/4, 430, Leonardo A119, AW139, AW189, Airbus AS350, EC130, and MD Helicopters MD500. IBF BENEFITS: PERFORMANCE MAXIMUM ENGINE DEBRIS/FOD PROTECTION Allows consistent flight operations and extends engine time on wing. Improved protection over an inertial design and significantly better protection than a FOD screen. IMPROVED AIRFLOW Pleated barrier filter element provides improved air flow versus inertial separation vortex/swirl tubes typical with IPS/EAPS. IBF BENEFITS: VALUE RETURN ON INVESTMENT (ROI) • Less premature engine removals, meet the expected engine TBO • Long-life 4,500 flight hour filter assemblies (15 cleanings; 300-hour intervals) • Reduction in corrosive salt air entering engine • Engine overhaul cost reduction due to elimination of erosion and contamination on all rotating and pneumatic components • Reduced maintenance time with improved plenum access. • Common Line Replaceable Units (LRU) for mixed IBF fleets. • Bleed air system maintenance eliminated with IBF IBF OPERATIONAL CONSIDERATIONS • Approved for installation on both aluminum and composite cowls. • Improved power margin for high/hot operations and confined landing zones. Filter sized for Bell 407 engine airflow. • Engine performance retention after barrier filter installation. • Inlet air bypass system backup not available with EAPS; added safety feature. • Certified for flight in falling and blowing snow IAW helicopter manufacturers flight manual requirements. • Common components with Donaldson IBF systems for Bell 407, 206L-3/4, 206L-1/C30. • IBF is approximately 2 lbs. lighter than EAPS. • Approved for flight to basic inlet charts and compatible with BHT-407-FMS-8. IBF COMPARATIVE BENEFITS • Engine Air Particle Separators (EAPS) utilize traditional inertial particle separation technology. Barrier Filters (BF) use current technology and state of the art integration. • BF does not require the use of engine bleed air. EAPS does require engine bleed air which reduces engine power available. • Engine bleed air system maintenance is eliminated. Reduced chance of engine stall from leaking valves and lines. • Inertial separation vortex/swirl tubes routinely become clogged with straw, leaves and bugs degrading performance; Barrier filter immune to this type debris clogging and operates without degradation. IBF COMPARATIVE BENEFITS • Barrier Filters (BF) have significantly higher separation efficiency than inertial separators. BF typically >99% capture efficient on ISO Coarse & Fine dust, inertial separator typically <96% capture efficiency on ISO Coarse dust and far less on ISO Fine dust. • BF are effective regardless of engine power setting; inertial separators (PS) are only effective when they have adequate engine bleed air; PS adequacy typically available above flight idle power setting. • Significant decrease in fine sand ingestion reduces engine erosion damage from offsite landings/unprepared sites; BF virtually eliminate concern about ramp FOD ingestion Thank You