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An emb-145 flight crew experienced heading cautions on their pfds due to a malfunctioning RMI compass.
| Attributes | |
| ACN | 904401 |
| Time | |
| Date | 201008 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | EMB ERJ 145 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Compass (HSI/ETC) |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Track / Heading All Types |
Narrative:
The SID was a departure using vors. While intercepting the radial; ATC reported our course appeared to be off about 10 degrees. We noted it at the time. The next day in the same aircraft we kept getting intermittent 'heading' caution flags on both pilot pfds and noted up to a 15 degree differential between all three heading instruments: both pilot rmis and the wet compass (using the calibration card). Maintenance was consulted in flight and I also notified ATC of the problem with no assistance required except 'to keep an eye on us'. The RNAV function appeared to be working fine. Maintenance took the aircraft for action.
Original NASA ASRS Text
Title: An EMB-145 flight crew experienced HDG cautions on their PFDs due to a malfunctioning RMI compass.
Narrative: The SID was a departure using VORs. While intercepting the radial; ATC reported our course appeared to be off about 10 degrees. We noted it at the time. The next day in the same aircraft we kept getting intermittent 'HDG' caution flags on both pilot PFDs and noted up to a 15 degree differential between all three heading instruments: both pilot RMIs and the wet compass (using the calibration card). Maintenance was consulted in flight and I also notified ATC of the problem with no assistance required except 'to keep an eye on us'. The RNAV function appeared to be working fine. Maintenance took the aircraft for action.
Data retrieved from NASA's ASRS site as of April 2012 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.