 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A CL300 departed lga runway 13 which has metal beneath the runway and experienced a slave compass miscompare until the flux valves could correctly sense the earth's magnetic field. ATC provided vectors as the crew worked the problem.
| Attributes | |
| ACN | 951641 |
| Time | |
| Date | 201105 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZNY.ARTCC |
| State Reference | NY |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Challenger 300 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Climb |
| Route In Use | Vectors |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | AHRS/ND |
| Person 1 | |
| Function | Pilot Not Flying First Officer |
| Qualification | Flight Crew Flight Instructor Flight Crew Instrument Flight Crew Multiengine Flight Crew Commercial |
| Experience | Flight Crew Last 90 Days 150 Flight Crew Total 2300 Flight Crew Type 125 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Clearance Deviation - Track / Heading All Types |
Narrative:
Departing runway 13 from lga; we experienced a dg slave miscompare annunciation due to the metallic stanchions on that approach end. We then changed modes from slave to dg to alleviate that miscompare. Upon climbing to 17;000; we were directed by ZNY to fly direct white. We read back and armed navigation. We were then told by the controller that we were heading north instead of south to white. We replied that we had some dg issues and that it would take a few minutes to resolve it. The controller gave us an instruction to keep turning right until we were at 090 degrees. We were flying by the standby compass until the issue was resolved. We changed modes back to slave and it reset itself. We were then given direct white by the controller again and the system worked nominal.
Original NASA ASRS Text
Title: A CL300 departed LGA Runway 13 which has metal beneath the runway and experienced a slave compass miscompare until the flux valves could correctly sense the earth's magnetic field. ATC provided vectors as the crew worked the problem.
Narrative: Departing Runway 13 from LGA; we experienced a DG slave miscompare annunciation due to the metallic stanchions on that approach end. We then changed modes from SLAVE to DG to alleviate that miscompare. Upon climbing to 17;000; we were directed by ZNY to fly direct WHITE. We read back and armed NAV. We were then told by the Controller that we were heading north instead of south to WHITE. We replied that we had some DG issues and that it would take a few minutes to resolve it. The Controller gave us an instruction to keep turning right until we were at 090 degrees. We were flying by the standby compass until the issue was resolved. We changed modes back to SLAVE and it reset itself. We were then given direct WHITE by the Controller again and the system worked nominal.
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.