WAAS GPS with LPV Approach Capability for Part 25 Aircraft
Requirements for WAAS capable GPS / FMS with LPV approach capability installations in part 25 aircraft fall under a different set of restrictions than the part 23 counterpart. The FAA has set in place more stringent standards to ensure proper functionality and safety to meet the interface requirements between different avionics system. As of February 11, 2010, there are currently 1,975 published WAAS LPVs. See the FAA site for further details.	Contact

Home RNP WAAS LPV Approach Part 25 WAAS FMS Manufacturers MRO Facilities with WAAS FMS Solutions	Basics of Part 25 Operator WAAS GPS / FMS Installation Requirements Currently all installations are approved by STC Dual FMS / GPS systems or FMS / GPS system with remote GPS monitor (WAAS Capable) Independent WAAS GPS antennas Ability to display lateral and vertical information on the primary flight display'(s) Ability to couple the approach mode to the auto pilot WAAS GPS Upgrade Notes Not all displays or EFIS systems are compatible or able to display required LPV approach information. Some EFIS systems may require modification to meet LPV requirements A single FMS CDU can be used provided a secondary GPS WAAS receiver / computer is installed (Remote WAAS Monitor) Publications Regarding GPS / WAAS Installations on Part 25 Aircraft AC 25.1309-1A - Various acceptable means for showing compliance with the requirements of FAR 25.1309 (b), (c), and (d). AC 20-138A - Airworthiness Approval of Global Navigation Satellite System (GNSS) Equipment TSO-C146c - Stand-Alone Airborne Navigation Equipment Using The Global Positioning System Augmented By The Satellite Based Augmentation System WAAS GPS Installation Considerations for LPV Approach Capability Update Rate - GPS sensors must be able to provide position updates at a rate of 5 hertz (5 times a second). Differential Group Delay - GPS sensors must be installed using antennas that meet the requirements of RTCA/DO-229C. WAAS GPS receiver compatible antennas must be used. Performance Monitoring - Information must be provided to the crew which monitors progress and safety of the approach operation to include the following: Selected NAV source Approach Identification Horizontal deviation information Vertical deviation information System Status - Crew must be able to evaluate the status of equipment before takeoff and throughout the phase of flight. Annunciations - For aircraft with more than one NAV source, a positive indication of the NAV source selected must be in the normal field of view.
WAAS FMS.com ©2010 All information contained within this site is for use as reference only. WAAS FMS.com makes no guaranties implied or written as to accuracy of information provided. We use third-party advertising companies to serve ads when you visit our website. These companies may use information (not including your name, address, email address, or telephone number) about your visits to this and other websites in order to provide advertisements about goods and services of interest to you. If you would like more information about this practice and to know your choices about not having this information used by these companies, click here. Partner: Website Solutions \| AN Fittings \| Wire Connectors \| Tube Amp \| DiY Remodeling Project \| Custom Cabinets \| Hardwoods

WAAS GPS with LPV Approach Capability for Part 25 Aircraft

Requirements for WAAS capable GPS / FMS with LPV approach capability installations in part 25 aircraft fall under a different set of restrictions than the part 23 counterpart. The FAA has set in place more stringent standards to ensure proper functionality and safety to meet the interface requirements between different avionics system.

As of February 11, 2010, there are currently 1,975 published WAAS LPVs. See the FAA site for further details.

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MRO Facilities with WAAS FMS Solutions

Basics of Part 25 Operator WAAS GPS / FMS Installation Requirements

Currently all installations are approved by STC
Dual FMS / GPS systems or FMS / GPS system with remote GPS monitor (WAAS Capable)
Independent WAAS GPS antennas
Ability to display lateral and vertical information on the primary flight display'(s)
Ability to couple the approach mode to the auto pilot

WAAS GPS Upgrade Notes

Not all displays or EFIS systems are compatible or able to display required LPV approach information.
Some EFIS systems may require modification to meet LPV requirements
A single FMS CDU can be used provided a secondary GPS WAAS receiver / computer is installed (Remote WAAS Monitor)

Publications Regarding GPS / WAAS Installations on Part 25 Aircraft

AC 25.1309-1A - Various acceptable means for showing compliance with the requirements of FAR 25.1309 (b), (c), and (d).
AC 20-138A - Airworthiness Approval of Global Navigation Satellite System (GNSS) Equipment
TSO-C146c - Stand-Alone Airborne Navigation Equipment Using The Global Positioning System Augmented By The Satellite Based Augmentation System

WAAS GPS Installation Considerations for LPV Approach Capability

Update Rate - GPS sensors must be able to provide position updates at a rate of 5 hertz (5 times a second).
Differential Group Delay - GPS sensors must be installed using antennas that meet the requirements of RTCA/DO-229C. WAAS GPS receiver compatible antennas must be used.
Performance Monitoring - Information must be provided to the crew which monitors progress and safety of the approach operation to include the following:

Selected NAV source
Approach Identification
Horizontal deviation information
Vertical deviation information

System Status - Crew must be able to evaluate the status of equipment before takeoff and throughout the phase of flight.
Annunciations - For aircraft with more than one NAV source, a positive indication of the NAV source selected must be in the normal field of view.

WAAS FMS.com ©2010
All information contained within this site is for use as reference only.
WAAS FMS.com makes no guaranties implied or written as to accuracy of information provided.
We use third-party advertising companies to serve ads when you visit our website. These companies may use information (not including your name, address, email address, or telephone number) about your visits to this and other websites in order to provide advertisements about goods and services of interest to you. If you would like more information about this practice and to know your choices about not having this information used by these companies, click here.

Partner: Website Solutions | AN Fittings | Wire Connectors | Tube Amp | DiY Remodeling Project | Custom Cabinets | Hardwoods