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Crj-900 first officer reported receiving the caution messages 'ob flight spoilers' and 'ob spoilers' on descent; apparently resulting from a PCU jam.
| Attributes | |
| ACN | 1545815 |
| Time | |
| Date | 201805 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.TRACON |
| State Reference | US |
| Environment | |
| Flight Conditions | Marginal |
| Aircraft 1 | |
| Make Model Name | Regional Jet 900 (CRJ900) |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Spoiler System |
| Person 1 | |
| Function | First Officer Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
During descent; the first officer extended the in-flight spoilers. During extension; the left outboard spoiler encountered a PCU jam which resulted in a shutdown of the outboard flight spoilerons. Two caution messages appeared on ED1: ob flight spoilers; ob spoilers. Captain transferred radio responsibilities to the first officer and verbally ran QRH. After completion of QRH; captain and first officer agreed to notify ATC based on the failure of a primary flight control. Captain then contacted [the] forward flight attendant to provide briefing items. After this was completed; captain coordinated with ATC [and] as per the QRH; the longest runway was requested and subsequently assigned for landing. After the first officer made a smooth landing; the aircraft exited the runway on the taxiway. We arrived at the gate with no reported passenger injuries or aircraft damage. Review fleet trends in order to determine if spoileron failure rates warrant further monitoring or investigation.
Original NASA ASRS Text
Title: CRJ-900 First Officer reported receiving the caution messages 'OB FLT SPOILERS' and 'OB SPOILERS' on descent; apparently resulting from a PCU jam.
Narrative: During descent; The First Officer extended the in-flight spoilers. During extension; the left outboard spoiler encountered a PCU jam which resulted in a shutdown of the outboard flight spoilerons. Two caution messages appeared on ED1: OB FLT SPOILERS; OB SPOILERS. Captain transferred radio responsibilities to the First Officer and verbally ran QRH. After completion of QRH; Captain and First Officer agreed to notify ATC based on the failure of a primary flight control. Captain then contacted [the] forward Flight Attendant to provide briefing items. After this was completed; Captain coordinated with ATC [and] as per the QRH; the longest runway was requested and subsequently assigned for landing. After the First Officer made a smooth landing; the aircraft exited the runway on the taxiway. We arrived at the gate with no reported passenger injuries or aircraft damage. Review fleet trends in order to determine if spoileron failure rates warrant further monitoring or investigation.
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.