Fault Message:

RVDT EXCITATION/ SFCH/ SFCU#2/ WRG

Fault Code:

2752259STD

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)
• Slat Flap Selector Handle (SFSH) (MT79)
• Associated Wiring

Advisory Wire/Service Bulletin:

• AW700-45-0065 - CAIMS Nuisance Fault Messages

Forum Articles/Infoservice/Newsletter: None

There are alternative ways to clear the fault:

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. 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.

2. Remove the SFCU and perform resistance check between the flap RVDT and SFCU as follows:
   NOTE: Performing this resistance check will verify the interface wiring in addition to the resolver.

   Source	From	To	Expected Result	Result
   from FH RVDT one	A95AP1-28	A95AP1-27	29 to 41 ohms
   from FH RVDT two	A95AP1-41	A95AP1-40	29 to 41 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.

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

   Source	From	To	Expected Result	Result
   FH RVDT one	MT79J2-8	MT79J2-7	29 to 41 ohms
   FH RVDT two	MT79J2-8	MT79J2-7	29 to 41 ohms

   1. If resistance of the resolver is within tolerance, do close out.
   2. If resistance checks are out of tolerance, continue with next step.

4. Replace SFSH.
5. Do close out.