Message Name:

R MLG WELL LOOP / WIRING / FIDEEX CONTROL UNIT

Message Code:

2610014WK

Associated CAS:

MLG BAY OVHT FAIL
(Caution)

This message shows when there is a failure in Right Main Landing Gear (MLG) Overheat Sensing Loop.

• Right Main Landing Gear (MLG) Overheat Sensing Element
• Fire Detection and Extinguishing Control Unit (FIDEEX CU) (A106)
• Associated Wiring

1. Allow aircraft to cool to the ambient temperature before you do the fault isolation.
2. Perform a visual inspection of right MLG sensing element and grommets: make sure elements are not bent or in contact with other element. Check also for damaged connector. Repair or align as required.

   1. If system checks are good, do close out.
   2. If fault remains, continue with next step.

3. Perform a resistance check of right MLG overheat sensing elements (between terminal lug and element)

   1. If resistance is within tolerance, go to step 5.
   2. If resistance is out of tolerance, continue with next step.

      Resistance at ambient temperatures.
      65 °F/18 °C	55.06 MOhms
      70 °F/21 °C	48.22 MOhms
      75 °F/24 °C	42.23 MOhms
      80 °F/27 °C	36.99 MOhms
      85 °F/29 °C	32.39 MOhms
      90 °F/32 °C	28.37 MOhms
      95 °F/35 °C	24.85 MOhms
      100 °F/38 °C	21.76 MOhms

4. Replace defective MLG sensing element.

   1. If system checks are good, do close out.
   2. If fault remains, continue with next step.

5. Perform wiring checks between FIDEEX CU (A106P2), and Right Main Wheel Well Element (E47).

   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.

6. Replace FIDEEX CU.
7. Do close out.