Narrative:

1. Situation: G650ER was in flight from ZZZ to ZZZ1 and diverted to ZZZZ2 due to flight control surface failure. Landing was made without any injury to personnel or damage to the aircraft. Aircraft was able to taxi off the runway and continue to parking where the aircraft was secured.1.a. Crew alerting system (cas) messages at FL470 and 250KCAS while en route: two (2) observed cas messages appeared. 1) amber fcs maintenance required; and 2) amber fcs spoiler panel fail. PIC then initiated a cyan cas event record. At this point there are three (3) messages showing on the cas stack.1.b. Initial actions - maintain control of the aircraft: PIC was pilot flying (PF) and immediately assigned duties. PF remained flying and handled ATC communication. Pilot monitoring (pm) was to refer to checklist actions and remain as monitoring pilot. G650ER QRH was referenced. At this point PF was able to maintain control of the aircraft and flight path was not compromised. No degradation of control was experienced after the messages appeared with aircraft remaining in normal FCC mode. AP1 remained engaged after the cas messages appeared. After scanning the rest of the aircraft systems pages; in particular the hydraulics; there were no other symptoms showing.1.c. Analyze the situation - QRH: after a short discussion of the problem between the crew; the QRH was referenced in the following areas. Amber cas spoiler panel fail procedures (G650ER QRH). Spoiler panel failure (G650ER QRH). Flight control surface failure inhibiting protection logic on remaining surfaces (G650ER afms G650ER). Amber cas fcs maintenance required (G650ER QRH). Landing urgency considerations (G650ER). Abnormal procedures 03-00-10 general guidance (G650ER afm).1.d. Take action as necessary: 1.d.1. It was clear to the PIC that after running the gulfstream checklists; that a land as soon as possible scenario may quickly develop as the final option (G650 afms G650ER). After a short analysis of possible divert airfields; and after checking current airfield weather; a plan was made to divert to ZZZZ2 if necessary. PIC briefed the crew on the assigned duties needed during the QRH actions. Flight attendants were advised by the PIC of the situation; and made aware that troubleshooting procedures will be implemented; finally asking that the cabin to be made ready for a possible divert.1.d.2. PIC then organized the cockpit for an approach into ZZZZ2 and preset the FMS and navaids for the ILS runway 19R; this would reduce workload during a subsequent approach. Weather was checked; landing distances analyzed; and threats discussed. If a flight controllability check was needed; PIC discussed how that was to be done over the ZZZZ2 airspace.1.d.3. After questions and comments were taken from all crew members; PIC asked that the cabin be made ready in case any flight control problems encountered during the flight control reset switch is pressed; which is part of the QRH procedures. All passengers were asked to be seated and secured. Flight attendants confirmed to PIC when this was done.1.d.4. With the plan briefed; and everyone staged properly; PIC finalized the assigned duties and initiated QRH actions. Start point is FL470 250 kcas with ZZZZ2 to our front approximately 130 miles. PF was flying; pm would read and/or work checklists and handle radio communication. First QRH action; amber cas spoiler panel fail procedures (G650ER QRH) were accomplished; message did not clear; PIC is now hand flying the aircraft. Next QRH action; spoiler panel failure (G650ER QRH) procedures were accomplished followed thereafter by referencing the flight control surface failure inhibiting protection logic on remaining surfaces (G650ER afms G650ER). The amber cas fcs maintenance and spoiler panel fail messages did not clear. Per the checklist; ap was to remain off and land as soon as possible.1.d.5. Approach and landing: PIC initiated the land as soon as possible plan. [Distress call] was initiated to support our effort to land without delay as specified in the gulfstream checklist. Nature of the distress was described to the air traffic controller as an aircraft flight surface malfunction. Controllers facilitated a descent and approach without any problems or unusual maneuvering. Aircraft was hand flown in IMC on the ILS runway 19R. On landing; spoilers were manually deployed by the pm and no controllability issues encountered. Controllability was not compromised during the portion of the flight after the flight control reset switch was pressed and the flight control laws remained in normal mode. Profile to the ground was flown with 250 kcas or less.

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Original NASA ASRS Text

Title: First Officer reported a diversion and precautionary landing after an FMC and spoiler panel failure in cruise.

Narrative: 1. Situation: G650ER was in flight from ZZZ to ZZZ1 and diverted to ZZZZ2 due to flight control surface failure. Landing was made without any injury to personnel or damage to the aircraft. Aircraft was able to taxi off the runway and continue to parking where the aircraft was secured.1.a. Crew Alerting System (CAS) messages at FL470 and 250KCAS while en route: Two (2) observed CAS messages appeared. 1) AMBER FCS Maintenance Required; and 2) AMBER FCS Spoiler Panel Fail. PIC then initiated a CYAN CAS Event Record. At this point there are three (3) messages showing on the CAS stack.1.b. Initial Actions - Maintain Control of the Aircraft: PIC was Pilot Flying (PF) and immediately assigned duties. PF remained flying and handled ATC communication. Pilot Monitoring (PM) was to refer to Checklist actions and remain as monitoring pilot. G650ER QRH was referenced. At this point PF was able to maintain control of the aircraft and flight path was not compromised. No degradation of control was experienced after the messages appeared with aircraft remaining in NORMAL FCC Mode. AP1 remained engaged after the CAS messages appeared. After scanning the rest of the aircraft systems pages; in particular the hydraulics; there were no other symptoms showing.1.c. Analyze the Situation - QRH: After a short discussion of the problem between the crew; the QRH was referenced in the following areas. AMBER CAS Spoiler Panel Fail procedures (G650ER QRH). Spoiler Panel Failure (G650ER QRH). Flight Control Surface Failure Inhibiting Protection Logic on Remaining Surfaces (G650ER AFMS G650ER). AMBER CAS FCS Maintenance Required (G650ER QRH). Landing Urgency Considerations (G650ER). Abnormal Procedures 03-00-10 General Guidance (G650ER AFM).1.d. Take Action as Necessary: 1.d.1. It was clear to the PIC that after running the Gulfstream checklists; that a LAND AS SOON AS POSSIBLE scenario may quickly develop as the final option (G650 AFMS G650ER). After a short analysis of possible divert airfields; and after checking current airfield weather; a plan was made to divert to ZZZZ2 if necessary. PIC briefed the crew on the assigned duties needed during the QRH actions. Flight Attendants were advised by the PIC of the situation; and made aware that troubleshooting procedures will be implemented; finally asking that the cabin to be made ready for a possible divert.1.d.2. PIC then organized the cockpit for an approach into ZZZZ2 and preset the FMS and navaids for the ILS Runway 19R; this would reduce workload during a subsequent approach. Weather was checked; landing distances analyzed; and threats discussed. If a flight controllability check was needed; PIC discussed how that was to be done over the ZZZZ2 airspace.1.d.3. After questions and comments were taken from all crew members; PIC asked that the cabin be made ready in case any flight control problems encountered during the FLT CONTROL RESET Switch is pressed; which is part of the QRH procedures. All passengers were asked to be seated and secured. Flight Attendants confirmed to PIC when this was done.1.d.4. With the plan briefed; and everyone staged properly; PIC finalized the assigned duties and initiated QRH actions. Start point is FL470 250 KCAS with ZZZZ2 to our front approximately 130 miles. PF was flying; PM would read and/or work checklists and handle radio communication. First QRH action; AMBER CAS Spoiler Panel Fail procedures (G650ER QRH) were accomplished; message did not clear; PIC is now hand flying the aircraft. Next QRH action; Spoiler Panel Failure (G650ER QRH) procedures were accomplished followed thereafter by referencing the Flight Control Surface Failure Inhibiting Protection Logic on Remaining Surfaces (G650ER AFMS G650ER). The AMBER CAS FCS Maintenance and Spoiler Panel Fail messages did not clear. Per the checklist; AP was to remain off and LAND AS SOON AS POSSIBLE.1.d.5. Approach and Landing: PIC initiated the LAND AS SOON AS POSSIBLE plan. [Distress call] was initiated to support our effort to land without delay as specified in the Gulfstream checklist. Nature of the distress was described to the air traffic controller as an aircraft flight surface malfunction. Controllers facilitated a descent and approach without any problems or unusual maneuvering. Aircraft was hand flown in IMC on the ILS Runway 19R. On landing; spoilers were manually deployed by the PM and no controllability issues encountered. Controllability was not compromised during the portion of the flight after the FLT CONTROL RESET SWITCH was pressed and the Flight Control Laws remained in NORMAL MODE. Profile to the ground was flown with 250 KCAS or less.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.