10/29/25
Message Overview:
| DDG Reference: | None |
| Pilot Action (QRH): | FCTL 07-43 |
| System Description: | 27-40-00 - Horizontal Stabilizer |
| Schematic Diagram: | [ Global Express ] [ G5000 ] [ Global XRS ] 27-41-00 - Horizontal Stabilizer Pitch Trim System |
| Wiring Diagram: | [ Global Express ] [ G5000 ] [ Global XRS ] 27-41-01 - Pitch Trim System Control |
Message Description:
When there is one or more of the conditions that follow:
- There is a report of a failure of the horizontal stabilizer channel 1.
- There is an abnormal operation of the master disconnect switch.
Possible Causes:
- Horizontal-stabilizer motor drive unit.
- Horizontal-stabilizer actuator or actuator motor
- FCU (both FCMs fail).
- Horizontal-stabilizer transducer.
- Master disconnect (MASTER DISC) switch on a hand wheel.
- Pitch trim (NOSE DN or NOSE UP) switch on the handwheel.
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
Flight Operation Notifications Manual (FONM):
- [ Global Express ] [ G5000 ] [ Global XRS ] FON 01-11 FCLT-004 [STAB CH1 FAIL] (Advisory/Cyan) or [STAB CH2 FAIL] (Advisory/Cyan) or [STAB TRIM] (Cyan/Amber) On Ground
NOTES:
- To support a NFF technical investigation please fill out this Questionnaire and send it to your FSR if you are replacing a Flight Control Unit (FCU).
- The Flight Control System Reset procedure may be performed in an attempt to clear the fault message.
- Verify C/B status on both pilot and copilot EMS CDUs. This CAS Message will post if either of the following circuit breaker or Smart Contactor status is OUT or Tripped.
| LOCATION | CB NO. | NAME |
|---|---|---|
| ACPC (A35) | CB-B6 | STAB TRIM CH1 |
| ACPC (A35) | SC-K15 | AC 1 FEED |
Quick Links:
| Removal of FCU | AMM 27-61-05-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of FCU | AMM 27-61-05-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of Pitch Trim Actuator Motor | AMM 27-41-13-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of Pitch Trim Actuator Motor | AMM 27-41-13-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of Pitch Trim Actuator Motor Drive Unit | AMM 27-41-17-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of Pitch Trim Actuator Motor Drive Unit | AMM 27-41-17-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of Pitch Trim Switches | AMM 27-41-01-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of Pitch Trim Switches | AMM 27-41-01-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wire Repair | SPM 20-12-10 [ Global Express ] [ G5000 ] [ Global XRS ] |
Troubleshooting Recommendations:
- Check status of AC 1 FEED on EMS CDU, the AC 1 Feed being out or tripped can drive multiple CAS to post.
BUS > AC 1 > AC 1 FEED.- If AC 1 FEED CB is IN go to step 3.
- If AC 1 FEED CB is OUT, set to IN.
AC 1 FEED CB SYSTEM PHASE CAS CB-G6 ESS TRU 1 3 AC BUS 1 FAIL (Caution) CB-G3 EVS FAIRING HEAT 3 EVS HEAT FAIL (Caution) CB-G9 SLAT/FLAP PWR 1 3 SLAT-FLAP HALFSPD (Advisory) CB-H5 EVS WINDOW HEAT 1 EVS HEAT FAIL (Caution) CB-H6 A/T CTLR 1 A/T 1 FAIL (Advisory)
A/T 2 FAIL (Advisory)CB-H7 PITOT 1 HT A 1 PITOT 1 HT FAIL (Caution) CB-H8 R ICE DETECTOR 1 ICE DETECTOR FAULT (Advisory) CB-H9 R AOA HEAT A 1 R AOA HEAT FAIL (Caution) CB-H10 L WSHLD HEAT 1 1 L WSHLD HEAT FAIL (Caution) CB-H11 L WSHLD HEAT 2 1 L WSHLD HEAT FAIL (Caution) CB-G12 TRU BAY FAN 3 ELEC SYS FAULT (Advisory) CB-B6 STAB TRIM CH1 3 STAB CH 1 FAIL (Advisory) - Did the CAIMS Fault & CAS messages clear after setting AC 1 FEED CB to IN.
- If YES, do close out.
- If NO, go to next step.
- Select related CAIMS message below.