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(WARNING)
RED MESSAGE (CAUTION)
AMBER MESSAGE (ADVISORY)
CYAN MESSAGE (STATUS)
WHITE MESSAGE Require immediate crew attention. These messages are accompanied by flashing master warning, triple chime attenson with or without voice message or dedicated tone. Require immediate crew awareness and future crew action may be required in the form of alternate system selection or performance limitation. These message are accompanied by flashing master caution and a single chime. Indicate safe or normal system operation which require crew awareness, over and above the dark cockpit philosophy. Indicate minor failures or reduction in systems capability, which require no crew action.

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08/02/24

Message Overview:

SLAT HALFSPD
(Advisory)

DDG Reference: 27-51-01
Pilot Action (QRH): ADVISORY 8-2
System Description: 27-50-00 - Slats and Flaps System
Schematic Diagram: 27-50-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 27-50-07 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Message Description:

The slats operate at half speed because of a fault condition in one channel.

Possible Causes:

  • One Slat Flap Control Unit (SFCU) (internal fault)
  • Single channel failure at one of the Slats Wingtip Position (resolver)
  • Single channel failure at one of the Slats Asymmetry Brakes
  • Single failure of one of the Slats Motor/Brake Modules
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

  • AW700-27-0373 - SFCU -17: "SLAT-FLAP HALFSPD" EICAS Nuisance Message
  • AW700-27-0631 - Slat/Flap HALFSPEED Messages - Intermittent Slat/Flap Resolver
  • AW700-45-0065 - CAIMS Nuisance Fault Messages

Forum Articles/Infoservice/Newsletter:

Flight Operation Notifications Manual (FONM):

  • [ Global Express ]  [ G5000 ]  [ Global XRS ] FON 01-11 FCLT-005, [SLAT_FLAP HALFSPD] (Advisory/Cyan) or [FLAP HALFSPD] or [SLAT HALFSPD] (Advisory/Cyan) On Ground 

NOTES:

  • To avoid the display of any Slat/Flap related CAS nuisance message after replacement of SFCU due to internal failure, follow AW700-27-0373 instructions.
  • Execute two consecutive Slats and Flaps electrical rigging per AMM 27-51-05-820-801 (All EICAS messages and CAIMS Active faults related to the Slat Flap Control System must be disregarded throughout the dual electrical CAIMS rigging process.)
  • Once the two CAIMS SFCS rigging are completed, perform a complete aircraft power shut down.
  • If an SFCU seems to be in a locked up state, please refer to this Troubleshooting Tip.

Quick Links:

Electronic Rigging of the Slat/Flap Control Unit (SFCU) AMM 27-51-05-820-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of  Slat Flap Control Unit (SFCU) AMM 27-51-05-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of  Slat Flap Control Unit (SFCU) AMM 27-51-05-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of Flap Power Drive Unit (PDU) Motors AMM 27-52-41-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of Flap Power Drive Unit (PDU) Motors AMM 27-52-41-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of Wing Asymmetry Brake AMM 27-52-53-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of Wing Asymmetry Brake AMM 27-52-53-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of Flap Resolvers AMM 27-52-49-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of Flap Resolvers AMM 27-52-49-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Access to Active Faults AMM 45-45-00-970-802 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Access to Stored Faults AMM 45-45-00-970-803 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair SPM 20-12-10 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Using the PMAT, access the Active Faults/Stored Faults as per AMM Tasks.
  2. Select related CAIMS message below:
  3. Do the close out.

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