Fault Message:

LEFT INBD GND SPLR ACTR FAULT

Fault Code:

27656182SX

Associated CAS:

CONFIG SPOILERS
(Warning)

GND LIFT DUMP
(Caution)

GND LIFT DUMP
(Advisory)

NO TAKEOFF
(Advisory)

The left inboard Ground Spoiler Actuator is defective detected by the Flight Control Unit (FCU) 2.

• Left Inboard Ground Spoiler Actuator
• Left Inboard Ground Spoiler (GS) Proximity Switch Sensor (PSS) (MT123)
• Flight Control Unit (FCU) 2 (A66)
• Associated Wiring

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

This fault may sometimes be cleared by performing the flight control system reset procedure.

1. Did the Spoilers deploy at the time of failure?

   1. If NO, go to step 6.
   2. If YES, continue with next step.

2. Access and disconnect FCU 2 Connector A66EP1 and Left Inboard GS Proximity Sensor Connector MT123P1. Perform a continuity check as follows:

   From	To	Result
   MT123P1-A	Ground
   MT123P1-B	Ground
   MT123P1-A	MT123P1-B

   1. If there is continuity, repair defective wiring as required and do close out.
   2. If there is no continuity, continue with next step.

3. Perform a continuity check as follows:

   From	To	Result
   MT123P1-A	A66EP1-7K
   MT123P1-B	A66EP1-7J

   1. If there is no continuity, repair defective wiring as required and do close out.
   2. If there is continuity, continue with next step.

4. Swap FCU 2 with FCU 1. Is the fault still present?

   1. If NO, replace FCU 2 and do close out.
   2. If YES, continue with next step.

5. Replace the Left Inboard GS Proximity Switch Sensor.
6. Deploy the ground actuator by using the hydraulic lock override feature. Cycle the ground spoiler surface 3-4 times.

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

7. Replace Left Inboard Ground Spoiler Actuator.
   NOTE: The FCU is able to differentiate between a defective selector valve and a defective actuator.
8. Do close out.