Fault Message:

FLAP RESOLVER EXCITATION/SFCU#2/WRG

Fault Code:

2752257STD

Associated CAS:

None

When one of the following conditions occurs:

• The output voltage is not within the permitted range
• The output current is not within the permitted range

• Slat Flap Control Unit (SFCU) 2 (A95)
• Left Flap Resolver (MT67)
• Right Flap Resolver (MT72)
• Associated Wiring

Advisory Wire/Service Bulletin:

• AW700-45-0065 - CAIMS Nuisance Fault Messages

Forum Articles/Infoservice/Newsletter: None

1. On the EMS CDU, select CTRL function and SLAT/FLAP RESET.
   NOTE: Wait at least one minute after SFCU reset to allow self-test to run.

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

2. Swap SFCU 2 with SFCU 1.

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

3. Check resistance value as follows:
   NOTE: Performing this resistance check will verify the interface wiring in addition to the resolver.

   Source	From	To	Expected Result	Result
   from Left Flap Resolver	A95AP1-96	A95AP1-95	13 to 24 ohms
   from Right Flap Resolver	A95AP1-82	A95AP1-81	13 to 24 ohms

   1. If resistance checks are out of tolerance, repair defective wiring as required and do close out.
   2. If resistance checks are within tolerance, continue with next step.

4. Perform a resistance check of the resolver as follows:

   Source	From	To	Expected Result	Result
   Left Flap Resolver	MT67J1-8	MT67J1-7	13 to 24 ohms
   Right Flap Resolver	MT72J1-8	MT72J1-7	13 to 24 ohms

   1. If resistance checks are out of tolerance, go to step 6.
   2. If resistance of the resolver is within tolerance, continue with next step.

5. Perform wiring checks between the applicable SFCU and resolver.

   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 resolver.
7. Do close out.