01/17/25
Message Overview:
Message Name:
L HYDRAULIC INPUT FAIL
Message Code:
B3-007894
Associated CAS:
| Reporting LRU: | SPOILER ECU 1 |
| System Description: | 27-61-00 - Control and Indication (Spoilers) |
| Schematic Diagram: | 27-61-00 - Flight Spoiler Control and Indication System |
| Wiring Diagram: | 27-61-05 - Sheet 1 - Spoiler Electronic-Control Unit (SECU) No. 1 - 20501 TO 20806 27-61-05 - Sheet 2 - Spoiler Electronic-Control Unit (SECU) No. 1 - 20501 TO 20806 27-61-05 - Sheet 3 - Spoiler Electronic-Control Unit (SECU) No. 1 - 20501 TO 20806 27-61-05 - Sheet 1 - Spoiler Electronic-Control Unit (SECU) No. 1 - 20807 TO 20829 27-61-05 - Sheet 1 - Spoiler Electronic-Control Unit (SECU) No. 1 - 20830 TO 20874 27-61-05 - Sheet 1 - Spoiler Electronic-Control Unit (SECU) No. 1 - 20875 TO 20936 27-61-05 - Sheet 2 - Spoiler Electronic-Control Unit (SECU) No. 1 - 20875 TO 20936 27-61-05 - Sheet 1 - Spoiler Electronic-Control Unit (SECU) No. 1 - 20937 AND SUBS 27-61-05 - Sheet 2 - Spoiler Electronic-Control Unit (SECU) No. 1 - 20937 AND SUBS |
Message Description:
No Left Hydraulic 1 Input from System to Spoiler Electronic Control Unit 1 (SECU1).
Possible Causes:
- Spoiler Electronic-Control Unit 1 (SECU 1) (A118)
- Left Hydraulic System
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin:
- AW300-29-0079 - Hydraulic Pressure Transducer Failure
Full Throttle Blog/Forum Articles/Infoservice/Newsletter: None
Flight Operation Notifications Manual (FONM): None
Quick Links:
| Standard Aircraft Configuration for Maintenance | AMM 12-00-00-867-803 |
| Electrical/Electronic Safety Precautions | AMM 24-00-00-910-801 |
| Electrostatic-Discharge Safety Precautions | AMM 24-00-00-910-802 |
| Connect Electrical Power to the Aircraft | AMM 24-00-00-861-801 |
| Remove the Electrical Power from the Aircraft | AMM 24-00-00-861-802 |
| Removal of the Spoiler Electronic-Control Unit (SECU) | AMM 27-61-05-000-801 |
| Installation of the Spoiler Electronic-Control Unit (SECU) | AMM 27-61-05-400-801 |
| Electronic Rigging of the Spoiler Electronic-Control Unit (SECU) | AMM 27-61-05-820-802 |
| Functional Test of the Engine Driven Hydraulic Pump Auto Depressurization and Firewall Hydraulic Shutoff Valve Circuitry | AMM 29-12-00-720-801 |
| Visual Check of the Differential Pressure Indicators for the Pressure, Return, and Case-Drain Filter Manifolds | AMM 29-12-00-210-801 |
| Wiring - Maintenance Practices - ALL | SPM 20-12-00-02 |
| Wire Repair - Maintenance Practices - ALL | SPM 20-12-10-02 |
| Electrical Connectors - Maintenance Practice - ALL | SPM 20-20-00-02 |
Troubleshooting Recommendations:
- Cyan ICAS (FLAPS FAULT), (BRAKE FAULT) and (SPOILERS FAULT) all posted at the same time. Switch to Hydraulic Control synoptic page and check for any abnormal indications, typically magenta dashes for indication.
- Hydraulic pressure data is supplied to the SECU on the L-GP-5 bus, if the hydraulic information is good on the displays, troubleshoot the L-GP-5 ARINC databus.
- Additional troubleshooting on this condition, refer to AW300-29-0079.
