Message Name:

TS1L - SENSOR FUEL TEMP/WRG FAULT

Message Code:

2844601PK

TS1L SENSOR, FUEL TEMP/WRG FAULT shows when:

• Temperature Sensor is out of range (-60°C to +70°C)
• Temperature Sensor circuit is open
• Temperature Sensor circuit is shorted

• Left Temperature Sensor 1 (TS1L) (E34)
• Fuel Management and Quantity Gauging Computer (FMQGC) (A47)
• Associated Wiring

Advisory Wire/Service Bulletin:

• AW700-45-0065 - CAIMS Nuisance Fault Messages

Forum Articles/Infoservice/Newsletter: None

Flight Operation Notifications Manual (FONM): None

1. Remove the FMQGC and inspect all connectors and pins on the unit and A/C side. Rerack the FMQGC and make sure it is fully and properly pushed into place. Is the fault still present?

   1. If NO, do close out.
   2. If YES, continue with next step.

2. Remove the FMQGC and perform a resistance check as follows and compare results to the resistance chart below:

   From	To	Result	Expected Result
   A47AP1-A4	A47AP1-B4		See resistance chart
   A47AP1-A4	Ground		Open
   A47AP1-B4	A47AP1-C4		Continuity
   A47AP1-B4	Ground		Open

   1. If the resistance values are within tolerance, replace the FMQGC and do close out.
   2. If the resistance values are not within tolerance, continue with next step.
      TIPS: Better results are obtained if aircraft has been allowed to reach ambient temperature inside a hangar. Resistance results can be compared with the other fuel temperature sensors, they should be very close with each other.
      

3. Perform a wiring check between the left Temperature Sensor TS1L and the FMQGC. Look for continuity, short circuit and high resistance.

   1. If wiring checks are not good, repair defective wiring as required and do close out.
   2. If wiring checks are good, continue with next step.
      TIP: It is recommended to start with the wiring checks that can be performed outside the fuel tank first. If a wiring defect is found outside the fuel tank, it will prevent you from having to prepare the fuel tank for access.

4. Perform a visual inspection of the Temperature Sensor. Make sure it is exempt of damage, corrosion or contamination. Pay attention to the electrical connections.

   1. If defects are found, rectify as required and do close out.
   2. If checks are good, continue with next step.

5. Interchange Temperature Sensor 1 with Temperature Sensor 2. Is the fault message still present?

   1. If NO, replace the defective Temperature Sensor and do close out.
   2. If YES, replace the FMQGC and continue with next step.

6. Do close out.