Fault Message:

SFCH /SFCU/ WIRING

Fault Code:

2750010STD

Associated CAS:

FLAP FAULT
(Caution)

SLAT FAIL
(Caution)

SLAT FAULT
(Caution)

SLAT FLAP FAIL
(Caution)

SLAT FLAP FAULT
(Caution)

FLAP HALFSPD
(Advisory)

SLAT FLAP HALFSPD
(Advisory)

SLAT HALFSPD
(Advisory)

Reporting LRU:	Slat/Flap Control Unit (SFCU)
System Description:	27-51-00
Schematic Diagram:	27-50-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram:	27-50-03 [ Global Express ]  [ G5000 ]  [ Global XRS ] 27-50-04 [ Global Express ]  [ G5000 ]  [ Global XRS ]

• Slat/Flap Control Unit (SFCU) 1 or SFCU 2 does not receive input from the Slat/Flap Control Handle (SFCH), OR
• Input from one or both Rotary Variable Differential Transformers (RVDTs) inside the Slat/Flap Control Handle are not matched in the acceptable range

• Slat/Flap Control Unit (SFCU) 1 (A124)
• Slat/Flap Control Unit (SFCU) 2 (A95)
• Slat/Flap Selector Handle (MT79)
• Associated Wiring

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Removal of the SLAT/FLAP Selector Handle	AMM 27-51-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the SLAT/FLAP Selector Handle	AMM 27-51-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Slat/Flap Control Unit (SFCU)	AMM 27-51-05-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Slat/Flap Control Unit (SFCU)	AMM 27-51-05-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL	SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

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.
2. Cycle the flaps from IN/0 degrees to OUT/30 degrees.

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

3. Swap SFCU 1 with SFCU 2.

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

4. Move the SFCL to a different detent.

   1. If system checks are good, do close out.
   2. If fault remains, continue with next step.
      NOTE: SFCU 1 is the left side (channel 1) controller. SFCU 2 is the right side (channel 2) controller.

5. Perform a Slat/Flap Control Handle resistance check of the applicable SFCU.

   SFCU 1:

   Function	From	To	Expected Result	Result
   Excitation channel 1	A124AP1-28	A124AP1-27	29 to 41 ohms
   Excitation channel 2	A124AP1-41	A124AP1-40	29 to 41 ohms
   Pos. S2 channel 1	A124AP1-18	A124AP1-32	20 to 28 ohms
   Pos. S1 channel 1	A124AP1-19	A124AP1-32	20 to 28 ohms
   Pos. S2 channel 2	A124AP1-51	A124AP1-38	20 to 28 ohms
   Pos. S1 channel 2	A124AP1-52	A124AP1-38	20 to 28 ohms

   SFCU 2:

   Function	From	To	Expected Result	Result
   Excitation channel 1	A95AP1-28	A95AP1-27	29 to 41 ohms
   Excitation channel 2	A95AP1-41	A95AP1-40	29 to 41 ohms
   Pos. S2 channel 1	A95AP1-18	A95AP1-32	20 to 28 ohms
   Pos. S1 channel 1	A95AP1-19	A95AP1-32	20 to 28 ohms
   Pos. S2 channel 2	A95AP1-51	A95AP1-38	20 to 28 ohms
   Pos. S1 channel 2	A95AP1-52	A95AP1-38	20 to 28 ohms

   1. If resistance is within range, go to step 7.
   2. If fault remains, continue with next step.

6. Perform wiring checks between the applicable SFCU and the SFCH.

   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.

7. Replace SFCH.
   NOTE: The connectors on the SFCH cannot be exchanged because they are keyed differently.
8. Do close out.