U.S. Department of Transportation

Federal Aviation Administration

Washington , D.C.





Revision: Original






Garmin International, Inc.

GTN 625/635/650 Navigator

GTN 725/750 Navigator





Date: 12/20/2011


Gregory W. Shetterly, Chairman

Flight Standardization Board



Federal Aviation Administration

Kansas City Aircraft Evaluation Group

901 Locust St reet , Room 332

Kan s as City , MO 64106







(816) 329-3238


(816) 329-3241














                                     ___________________________________________ Date: 1/3/2012

James A. Orchard


Kan s as City Aircraft Evaluation Group




                                                                                             Date: 2/24/2012

John Duncan

Manager, AFS-200

Air Transportation Division





                                                                                           Date: 1/17/2012

Mel O. Cintron

Manager, AFS-800

General Aviation and Commercial Division



Revision Number









































SECTION                                                                                                                                                                                                                                PAGE


              MANAGEMENT COORDINATION SHEET ...................................................................... 1


              RECORD OF REVISIONS.................................................................................................. 2


              CONTENTS ....................................................................................................................... 3


1.            PURPOSE AND APPLICABILITY                                                                                            


2.          DESCRIPTION


3.          PROCEDURES FOR USE OF THE GTN 625/635/650 AND GTN 725/750 NAVIGATORS.
















The primary purpose of this Operational Suitability Report (OSR) is to specify FAA training, checking and currency requirements of pilots/flight crew members operating the Garmin GTN 625/635/650 and GTN 725/750 series of navigators (referred to in the balance of this report as GTN 6XX and GTN 7XX) installed in General Aviation aircraft, as evaluated by the Kansas City Aircraft Evaluation Group. Evaluations were conducted in a Hawker Beechcraft A-36 Bonanza and a Hawker Beechcraft C-90 King Air.


This report establishes the operational suitability of the Garmin GTN 6XX and GTN 7XX series of navigators installed in aircraft not requiring a pilot type rating or those aircraft not operating under a Special Federal Aviation Regulation (SFAR). Operational suitability for those aircraft requiring a type rating or that operate under a SFAR will require individual evaluations.     This report does not approve the operational use of this equipment. Commercial operators must apply to their assigned operations authority for applicable operational use authorization.


The guidelines in this report apply to operations inspectors, principal operations inspectors (POIs), training center program managers (TCPMs). This report also applies to 14 CFR 135 air carrier check airmen and instructors, certificated flight instructors, training center evaluators (TCE’s), and 14 CFR Part 61, 135, 141 and 142 training providers.


This report may be used in its entirety or in part to assist AEG offices in the determination of operational suitability when the Garmin GTN 6XX and GTN 7XX series of navigators a s installed in aircraft requiring a pilot type rating, or aircraft operating under an SFAR.





The Garmin GTN 6XX and GTN 7XX series of navigators share the same basic navigation capabilities utilizing GPS/SBAS engines and are TSO-C146c certified for primary domestic, oceanic, and remote navigation including en route, terminal, and non-precision approaches, and approaches with vertical guidance, such as LPV, LNAV/VNAV. All units utilize capacitance touch screen technology for operation. Capacitance technology allows for some glove use if the operator follows the test procedure in the Pilots Guide on the specific unit to be used. There is an additional dual rotary manual selector knob located at the lower right hand position on the face of the unit, and a Power, Volume, Squelch On/Off selector knob at the upper left hand location.


The GTN 625 is the standard GPS navigator/flight planner with a 4 inch diagonal LCD screen. The GTN 635 includes the standard navigator and VHF Comm radio. The GTN 650 includes all the features of the GTN 625/635 plus VHF Nav radio capability. The GTN 725 is the standard GPS navigator/flight planner with a 7 inch diagonal LCD screen. The GTN 750 includes all the functions of the GTN 725 plus VHF Nav and Comm radio. Both GTN series navigators include a complete Jeppesen navigation data base.


Only the GTN 7XX series has limited Electronic Flight Bag (EFB) capability (see Appendix 1 for EFB information). Complete chart information may be viewed by selecting a full screen and scrolling from the top half of the chart to the bottom half of the selected chart with a single sliding touch on the screen.


Data bases are updated with a front-loading SD data card and can support multiple optional features such as XM Entertainment Radio, XM Weather, audio panel, and Mode S transponder.


The units are designed to fit in a standard 6.25 inch wide panel opening. The GTN 6XX series is 2.64 inches high and the GTN 7XX series is 6 inches high. The primary difference between the two series is the size of the LCD screens and the lack of chart capability in the GTN6XX series. There are minor operating differences as the smaller unit requires some additional scrolling or page selection to reach all the available touch screen controls. Pilot work load is acceptable using either series and more intuitively user friendly than the Garmin GNS series of navigators because of the ability for direct touch screen data entry not available in earlier designs.




                           GTN 750                                                                  GTN 650





Operators must develop normal, supplemental and emergency operating procedures from the AFMS, Pilot’s Guide, and Cockpit Reference Guide. These procedures will be included in the appropriate operator training course when required by 14 CFR.





Successful completion of GTN training is necessary when required. GTN training programs must be FAA approved when specified by 14 CFR. The minimum level of initial training for crewmembers operating the GTN series of navigators is established at Level C training. Level C training is essential to develop the skill and dexterity to use the touch screen.


Garmin has developed a power point training course and training syllabus for operators of the GTN series navigators which the Kansas City Aircraft Evaluation Group has determined provides complete operating information suitable for self study or classroom instruction . Operator’s Principal Inspectors may approve Garmin’s power point training program available from Garmin to meet some of the requirements of 14 CFR. (14 CFR 135.21, 135.329, 135.341, 135.343, 135.345, 135.347, 135.351 and 125.287, 125.296 may apply. However, there may be other regulations that require compliance. Operators should review the regulations to determine those that apply to their operations.)  The Garmin developed power point training program is only the initial part of a comprehensive training program at Level C, which will include operating experience on a GTN equipped FSTD or training in a GTN equipped aircraft. Other training programs may also be approved, provided they provide instruction over all the features and functions of the GTNs.


No initial training credit will be given to operators for previous use of other Garmin navigators such as the G-1000, GNS500, or GNS400 series of navigators. Although the GTN units operate with similar or like logic of earlier Garmin products, the uniqueness of the touch screen technology demands that pilots have a thorough understanding of the GTN series. Particular emphasis should be placed on techniques for using the hand stabilizer ridges to minimize turbulence caused errors, the type of glove used, and how to operationally test the glove/GTN interface.


GTN training should be incorporated into an operator’s initial, recurrent, upgrade and transition training. Recurrent ground training specific to the GTN series operation is not required provided that the GTN 6XX or 7XX is operated on two flight legs in line operations, within any 90 day period. The use of the these units should be incorporated as a component of recurrent flight training consistent with other normal and non-normal procedures training.





The minimum level of checking for crewmembers operating the GTN series of navigators is established at Level C


GTN normal and non-normal procedures should be evaluated. Particular attention by the evaluator should be placed on inadvertent mode activation or inappropriate function selection which may indicate inadequate training or insufficient practice .


Checking may be accomplished in a Flight Simulation Training Device (FSTD) appropriate to the type of equipment flown by the operator or in an aircraft equipped with GTN.




The minimum level of currency for crewmembers operating the GTN series of navigators is established at Level C. Operators should schedule crewmembers to operate the GTN 7XX or GTN 6XX navigator on at least two flight legs within any 90 day period, or reestablish currency by requiring a review of the appropriate GTN series Cockpit Reference Guide to reestablish currency. GTN Currency may be reestablished concurrently with compliance with 14 CFR 61.57, a Line Check, or supervised flying with a Check Airmen.





Acceptable training may utilize the Garmin web based training power point system of instruction in combination with instruction in a GTN equipped aircraft, FSTD, and aided classroom instruction.









The GTN 7XX navigator offers limited functionality as a Class 3 Electronic Flight Bag (EFB) device . This Appendix has limited applicability in that it does not include compliance for 14 CFR 91 Subpart F aircraft, because the evaluation for this report is limited to aircraft not requiring a Pilot Type Rating.(paragraph 1. Purpose and Applicability).


The following Type B applications were evaluated under this report:


(1) Chart capability is limited to Approach Charts, Standard Terminal Arrival Routes, Departure Procedures and Airport Diagrams Access to the chart information is accomplished by touching the chart symbol on the screen home page. Scaling is accomplished by touching the plus or minus signs on the screen. Chart information is in standard chart layout, oriented in portrait view.   It is possible to overlay an approach chart on the navigation display. Navigation Display Approach Chart overlays however, are always oriented so that North on the chart is at the top of the display. Caution should be taken when using this feature, as it can be confusing in some circumstances.


(2) En route charts are not available to view in the GTN 7XX series of units. Airways and associated navigation aids and intersection names are displayed on the navigation display but not in chart format. Because en route chart view is not available, operators will be required to have immediately accessible a suitable approved aeronautical information source of en route charts.


A typical installation includes a GTN 7XX paired with a GTN6XX. Since the GTN6XX series of navigator does not have chart capability a second GTN7XX with charts and an independent power source may be installed to provide the necessary backup. Another method of redundancy could be for the operator to carry an approved stand alone Class I, or Class II EFB device onboard the aircraft. Otherwise, a set of paper charts is required to provide chart redundancy.


In the case of a single unit installation, paper charts (including approach, departure and arrival procedure, airport diagram and en route charts) must be onboard the aircraft or an approved stand alone Class I, or Class II (with a suitable approved source of aeronautical data) device may be substituted for paper charts.