04/25/23
Message Overview:
Message Name:
RVDT OUT OF RANGE
Message Code:
B3-326115
| Associated CAS: | SPOILERS FAULT (CAUTION) |
| Reporting LRU: | MF SPOILER RVDT8 |
| System Description: | 27-61-00 - Control And Indication System (Spoilers) 27-62-00 - Multi-Function Spoilers |
| Schematic Diagram: | 27-41-00-101 - Pitch Trim System 27-62-00-101 - Multi-Function Spoiler 31-45-00-101 - Integrated-Avionics Processor System (IAPS) |
| Wiring Diagram: | 27-41-21 - Horizontal-Stabilizer-Trim Electronic-Control Unit (HST ECU) - ALL 27-62-13 Multi-Function Spoiler - RVDT ECU 2 - ALL 31-45-07 Integrated Avionics Processor System (R-GP-5) - 20501 TO 20886, 20888 TO 20890, 20896 TO 20898 31-45-07 Integrated Avionics Processor System (R-GP-5) - 20887, 20891 TO 20895, 20899 AND SUBS |
Message Description:
The Spoiler Electronic Control Unit 2 (SECU 2) has detected Right Outboard RVDT 8 out of range.
Possible Causes:
- Right Outboard Multi-Function Spoiler Rotary Variable-Differential Transformer (MFS RVDT) (MT146)
- Spoiler Electronic-Control Unit 2 (SECU 2) (A119)
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin:
- AW300-27-0037 - Spoiler Electronic Control Unit (SECU) - Circuit Breaker Reset Procedure (20501 - 20999)
Forum Articles/Infoservice/Newsletter: None
NOTE:
- If both SPOILERS FAULT (Caution) and STAB TRIM FAULT (Advisory) CAS messages are posted, focus the troubleshooting on wiring checks of L-GP5/R-GP5 data bus.
- During wiring checks, reference BD-100 Schematic Manual to aid in the ring-out. All MFS RVDT will have similar measurements for comparison, if anomalies are noted during ring-out.
| RVDT Components | Pins | Approx. Values |
|---|---|---|
| Primary Coil (Vp) | 1 - 2 | 24Ω |
| Secondary Coil (Va) | 3 - 4 | 12Ω |
| Secondary Coil (Vb) | 4 - 5 | 12Ω |
Quick Links:
| 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 27-61-05-820-801 |
| Electronic Rigging of the Spoiler Electronic-Control Unit (SECU) | AMM 27-61-05-820-802 |
| Removal of the Multi-Function Spoiler Rotary Variable-Differential Transformer (MFS RVDT) | AMM 27-61-11-000-801 |
| Installation of the Multi-Function Spoiler Rotary Variable-Differential Transformer (MFS RVDT) | AMM 27-61-11-400-801 |
| Rigging Check of the Multi-Function Spoiler Rotary Variable-Differential Transformer (MFS RVDT) | AMM 27-61-11-220-801 |
| 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:
- Follow the circuit breakers reset procedure documented in AW300-27-0037.
- If system checks are good, do close out.
- If fault remains, continue with the next step.
- Do Electronic Rigging of the Spoiler Electronic-Control Unit.
- If system checks are good, do close out.
- If fault remains, continue with the next step.
- Do wiring checks between SECU 2 connector A119AP1 and Right Outboard MFS RVDT connector MT146P1. Repair/replace as required.
- If system checks are good, do close out.
- If fault remains, continue with the next step.
- Confirm Right Outboard MFS RVDT coils are not open or shorted.
- If MFS RVDT wiring is found defective, go to step 7.
- If MFS RVDT wiring is confirm good, continue with the next step.
NOTE: A swap of the MFS RVDT to confirm a defective MFS RVDT wiring is also a possibility.
- Visually inspect SECU's and tray's connectors for damages. Repair/replace as required.
- If system checks are good, do close out.
- If fault remains, continue with next the step.
- Swap SECUs.
- If system checks are good, do close out.
- If fault remains, continue with the next step.
NOTE: An Electronic Rigging of the SECUs is necessary after a swap or a SECU replacement.
- Replace MFS RVDT.
NOTE: An Electronic Rigging of the SECUs is necessary after a MFS RVDT swap/replacement. - Do close out.