Vfr Gps; Usb Connection; Part 121/135 Operations; Vhf Hsi - Garmin GI 275 Installation Manual

2.1.4

VFR GPS

The VFR GPS can be used with an installed glare shield antenna as a backup GPS source or in an aircraft
without a primary GPS source. If the aircraft is IFR rated, the aircraft must maintain its equipment for IFR
requirements (i.e., NAV sources). The display of primary VFR GPS is for situational awareness only and is
not approved for IFR navigation credit.
2.1.5

USB Connection

Each installed GI 275 unit must have a dedicated USB connection. This can be accomplished with either
the USB pigtail (P/N 325-00238-02) that is included in each GI 275 connector kit or with the optional
GSB 15.
The USB pigtail is for maintenance purposes only and is prohibited from being used while in-flight. The
USB pigtail must be capped and stowed prior to returning the aircraft to service. The GSB 15 is capable of
powering PEDs using its USB ports while in-flight.
2.1.6

Part 121/135 Operations

Single-engine aircraft operated under 14 CFR Part 135 must have two independent electrical sources or a
standby battery or generator/alternator capable of supplying 150% of the electrical loads of all required
instruments and equipment necessary for safe emergency operations of the aircraft for 60 minutes in
accordance with 135.163(f).
For multi-engine aircraft operated under 14 CFR Part 135, the electrical load of all required instruments
and equipment necessary for emergency operations must not be greater than one-half of the total generated
power in accordance with 14 CFR 135.163(g).
2.1.7

VHF HSI

Unless the aircraft is placarded VFR Only, the GI 275 MFD must be configured to hide the HSI page when
the GI 275 is connected to a VHF NAV source. The CDI page may be used for VHF NAV.
2.1.8

Transponder Control

The Transponder Control function is only provided when the GI 275 is interfaced to a GTX 345 series
transponder. If configured, the Transponder Control page must be set as the final page on an MFD unit.
The GI 275 must be the only control source for the GTX 345 if used for the transponder control function;
control using another source, such as a GTN 6XX or GTN Xi, is outside the scope of this STC.
190-02246-14
Rev. 11
GI 275 STC EIS & MFD Installation Manual
Page 2-4