DIFFERENTIAL FUEL PRESSURE SENSOR FAILURE 914 TURBO
Feb 19, 2024 18:41:54 GMT
Flocker, ChiMike, and 2 more like this
Post by cole505 on Feb 19, 2024 18:41:54 GMT
Hi All,
Sharing my in flt fuel pressure sensor failure. The 914 turbo has two pressure sensors one is “air only” and the other is “fuel and air“ combination. While in flt the fuel pressure reading began to fluctuate rapidly then maxed out! Then failed showing the solid red X. I immediately turned on the backup fuel pump and kept an eye on the fuel quantity. Expedited my landing to my home airport KBVU Boulder City NV landed with no Issues. I found the cause of the sensor failure!
Remember this a dual sensor it provides an air pressure reading along with fuel pressure. Inside the sensor there is a “seal” that separates internal electronics from the fuel, the seal degraded allowing the fuel to enter the electrical components and even allowed fuel into the air side of the sensor, when I pull the airline away from the sensor fuel spilled out! NOT GOOD! It’s always nice when you find the true cause of the failure. I believe a contributing fact was the sensor was mounted against the intake manifold, not only exposing it to vibration, but heat as well. When I remounted it with the rubber clamp I made sure it had a 1/4 inch clearance away from the intake manifold….
Contacted Garmin and Josh at Tecnam he’s the go to guy for any information! They both agreed that it was probably the fuel pressure sensor. Ordered a new differential fuel pressure sensor 10-01057 UMA PRESSURE SENDER 0 - 7 PSI 1/8 installed the new sensor, replaced the connector pins installed the new sensor. Turned on the airplane engaged the fuel pump and had no pressure reading! Could not believe it! I triple checked all wiring all good! I am thinking a “NEW BAD SENSOR” I unscrewed the sensor from the fuel line to check the fuel flow and verified fuel pressure all good! I am now thinking that there may have been a little air trapped in the sensor with the air being compressed prohibiting the fuel pressure from being read by the sensor. So I made sure when I re-installed the sensor there was a small amount of fuel flowing while re-attaching the sensor. Can you believe that was it! Turned the airplane on there it was! A perfect fuel pressure readings cycled it on and off several times and did an in flight test all good! So I am hoping that this information may help someone having the same issue in the future.
Ray & Lucy 🇺🇸😊😊✈️✅
LSRM-A
Sharing my in flt fuel pressure sensor failure. The 914 turbo has two pressure sensors one is “air only” and the other is “fuel and air“ combination. While in flt the fuel pressure reading began to fluctuate rapidly then maxed out! Then failed showing the solid red X. I immediately turned on the backup fuel pump and kept an eye on the fuel quantity. Expedited my landing to my home airport KBVU Boulder City NV landed with no Issues. I found the cause of the sensor failure!
Remember this a dual sensor it provides an air pressure reading along with fuel pressure. Inside the sensor there is a “seal” that separates internal electronics from the fuel, the seal degraded allowing the fuel to enter the electrical components and even allowed fuel into the air side of the sensor, when I pull the airline away from the sensor fuel spilled out! NOT GOOD! It’s always nice when you find the true cause of the failure. I believe a contributing fact was the sensor was mounted against the intake manifold, not only exposing it to vibration, but heat as well. When I remounted it with the rubber clamp I made sure it had a 1/4 inch clearance away from the intake manifold….
Contacted Garmin and Josh at Tecnam he’s the go to guy for any information! They both agreed that it was probably the fuel pressure sensor. Ordered a new differential fuel pressure sensor 10-01057 UMA PRESSURE SENDER 0 - 7 PSI 1/8 installed the new sensor, replaced the connector pins installed the new sensor. Turned on the airplane engaged the fuel pump and had no pressure reading! Could not believe it! I triple checked all wiring all good! I am thinking a “NEW BAD SENSOR” I unscrewed the sensor from the fuel line to check the fuel flow and verified fuel pressure all good! I am now thinking that there may have been a little air trapped in the sensor with the air being compressed prohibiting the fuel pressure from being read by the sensor. So I made sure when I re-installed the sensor there was a small amount of fuel flowing while re-attaching the sensor. Can you believe that was it! Turned the airplane on there it was! A perfect fuel pressure readings cycled it on and off several times and did an in flight test all good! So I am hoping that this information may help someone having the same issue in the future.
Ray & Lucy 🇺🇸😊😊✈️✅
LSRM-A
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