Afm/Afms/Poh Considerations - Garmin GPS 400W Installation Manual

1.6.5

AFM/AFMS/POH Considerations

If the following information is not already included in an AFM, AFMS, or POH via an existing STC, it
may be used as guidance in developing an approved AFM, AFMS, and/or POH, provided the installation:
is comprised of one or more TSO-C146a Class 3 approved Garmin GNS 400W series navigation
unit(s) with GPS software version 3.0 or later approved version, and one or more Garmin approved
GPS/SBAS antenna(s) (see Table 1-2),
is installed in accordance with the guidance in AC 20-138C and the installation instructions in this
manual.
For installations or operation that requires dual GNSS installations, the installation needs to include one
or more Garmin GNS 400W series unit along with another Garmin TSO-C146a or TSO-C146c Class 3
approved GPS unit (such as the GNS 500W series or the GTN 6XX/7XX series units).
When using the following information to develop the AFMS, the information in [brackets] are examples
and should be updated appropriately for the specific installation and the equipment installed in the
specific aircraft. The paragraphs ―applicable to dual installations‖ should be included only for aircraft
that include dual GNSS installations.
GARMIN GNSS (GPS/SBAS) NAVIGATION SYSTEM EQUIPMENT APPROVALS
For FAA approved installations in U.S. registered aircraft:
The Garmin GNSS navigation system is a GPS system with a Satellite Based Augmentation System
(SBAS), comprised of [a TSO-C146a Class 3 approved Garmin GNS 430W with GPS software version
3.0, and a Garmin GA 35 antenna]. The Garmin GNSS navigation system in this aircraft is installed in
accordance with [AC 20-138C].
The Garmin GNSS navigation system as installed in this aircraft complies with the requirements of [AC
20-138C] and has airworthiness approval for navigation using GPS and SBAS (within the coverage of a
Satellite Based Augmentation System complying with ICAO Annex 10) for IFR en route, terminal area,
and non-precision approach operations (including those approaches titled ―GPS‖, ―or GPS‖, and ―RNAV
(GPS)‖ approaches). The Garmin GNSS navigation system is approved for approach procedures with
vertical guidance including ―LPV‖ and ―LNAV/VNAV‖ and without vertical guidance including ―LP‖
(for main SW version 3.30 or later) and ―LNAV‖, within the U.S. National Airspace System.
The Garmin GNSS navigation system complies with the equipment requirements of AC 90-105 and
meets the equipment performance and functional requirements to conduct RNP terminal departure and
arrival procedures and RNP approach procedures without RF (radius to fix) legs. Part 91 subpart K, 121,
125, 129, and 135 operators require operational approval from the FAA.
The Garmin GNSS navigation system complies with the equipment requirements of AC 90-100A for
RNAV 2 and RNAV 1 operations. In accordance with AC 90-100A, Part 91 operators (except subpart K)
following the aircraft and training guidance in AC 90-100A are authorized to fly RNAV 2 and RNAV 1
procedures. Part 91 subpart K, 121, 125, 129, and 135 operators require operational approval from the
FAA.
Applicable to dual installations consisting of two Garmin GNSS units: The Garmin GNSS navigation
system has been found to comply with the requirements for GPS Class II oceanic and remote navigation
(RNP-10) without time limitations in accordance with [AC 20-138C] and FAA Order 8400.12B. The
Garmin GNSS navigation system can be used without reliance on other long-range navigation systems.
This does not constitute an operational approval.
Applicable to dual installations consisting of two Garmin GNSS units: The Garmin GNSS navigation
system has been found to comply with the navigation requirements for GPS Class II oceanic and remote
navigation (RNP-4) in accordance with [AC 20-138C] and FAA Order 8400.33. The Garmin GNSS
navigation system can be used without reliance on other long-range navigation systems. Additional
GNS 400W Series Installation Manual
190-00356-08
Page 1-15
Rev. G