190-02246-11
GI 275 Part 23 AML STC Maintenance Manual
Rev. 1
Page 5-29
5.11.3 Pressure Sensors
Manifold pressure, oil pressure, and fuel pressure sensor installations are similar. Garmin pressure sensors
with a brass housing are limited to aircraft with operational ceilings up to 32,000 feet. Garmin pressure
sensors with a stainless steel housing may be used on all aircraft on the AML.
When replacing existing sensors:
• Do not remove engine and fuel fittings with an intentionally reduced orifice. It may limit fluid loss
and fire damage in the event of a hose failure
• Inspect the condition of all existing tubes, hoses, and fittings that are being reused; replace if
necessary
When installing pressure sensors:
• Fuel and oil hoses in the engine compartment must meet TSO-C53a Type C or D (fire resistant)
• Do not install sensors directly below fittings or components that may leak flammable fluid
• Thread sealant or tape must be used for the NPT threads. To reduce the risk of system
contamination, a minimal amount of sealant should be applied leaving at least two threads at the
end of the fitting clear of sealant/tape
• Sensors must be routed as far away from the aircraft exhaust system as practical and no closer than
6 inches
Table 5-1 Pressure Sensor Equipment List
Function
Manufacturer P/N, Description
Garmin P/N
Authorization
Oil Press
Kavlico P4055-5020-4, Press (Brass)
011-04202-30
(494-30027-30)
GI 275 STC
Kulite APT-20GX-1000-150G,
Press (Stainless)
494-30032-00
Manifold Press
Kavlico P4055-5020-1, Press (Brass)
011-04202-00
(494-30027-00)
GI 275 STC
Kulite APT-20GX-1000-25PSIA,
Press (Stainless)
494-30030-00
Fuel Press
Kavlico P4055-5020-3, Press (Brass)
011-04202-20
(494-30027-20)
GI 275 STC
Kavlico P4055-5020-2, Press (Brass)
011-04202-10
(494-30027-10)
APT-20GX-1000-50PSIG, Press (Stainless)
494-30031-00
APT-20GX-1000-15PSIG, Press (Stainless)
494-30029-00
