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A maintenance controller reports he deferred a fuel pressure switch on a crj-200 aircraft based on their fault isolation manual (fim) procedures for a 'fuel lo press' caution message. He was later informed that a standby fuel check valve could have been the problem and the importance of better troubleshooting to find root causes.
| Attributes | |
| ACN | 1032561 |
| Time | |
| Date | 201208 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Regional Jet 200 ER/LR (CRJ200) |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Minimum Equipment List (MEL) |
| Person 1 | |
| Function | Other / Unknown |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy |
Narrative:
I opened an MEL 73-31-3 for a fuel pressure indication system. I thought that the switch was at fault based on the fault isolation manual (fim) task for the 'fuel lo press' caution message. My supervisor informed me today that the standy fuel check valve could also cause the problem. My supervisor informed me that we need to do more troubleshooting to find root cause of problem. Based on the information that I had at the time; I believed that the pressure switch was reading incorrectly. We scheduled maintenance to look at problem. [Recommend] creating a flow chart for this particular message.
Original NASA ASRS Text
Title: A Maintenance Controller reports he deferred a fuel pressure switch on a CRJ-200 aircraft based on their Fault Isolation Manual (FIM) procedures for a 'FUEL LO PRESS' caution message. He was later informed that a Standby Fuel Check Valve could have been the problem and the importance of better troubleshooting to find root causes.
Narrative: I opened an MEL 73-31-3 for a Fuel Pressure Indication System. I thought that the switch was at fault based on the Fault Isolation Manual (FIM) task for the 'FUEL LO PRESS' caution message. My Supervisor informed me today that the Standy Fuel Check Valve could also cause the problem. My Supervisor informed me that we need to do more troubleshooting to find root cause of problem. Based on the information that I had at the time; I believed that the pressure switch was reading incorrectly. We scheduled Maintenance to look at problem. [Recommend] creating a flow chart for this particular message.
Data retrieved from NASA's ASRS site as of July 2013 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.