C. Temperature Sensors
The tank level sensing system has two temperature sensors, 29QJ1 (29QJ2)
and 30QJ1 (30QJ2), installed in each wing tank. The temperature sensor
29QJ1 (29QJ2) is in the wing tank inner cell and is sensitive to
temperatures of more than 52.5 deg C. The temperature sensor 30QJ1
(30QJ2) is in the wing tank outer cell and is sensitive to temperatures
of more than 55 deg C.
Each temperature sensor is near the lowest part of the related fuel cell.
This makes sure that the temperature sensor is in the fuel for most of
the time.
Do NOT confuse these with the sensor which activates the IDG NRT..