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Pilot was queried by controller why he was turning his emb-600 legacy aircraft at 14;900 instead of 15;000 as directed. Pilot noted all three altimeters did read 15;000. They rebooted the system onboard and the altimeter read correctly. The next day the same aircraft had the same condition. They rebooted the system and no further issues arose.
| Attributes | |
| ACN | 1286949 |
| Time | |
| Date | 201508 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Embraer Legacy 600 (EMB135BJ) |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Initial Climb |
| Route In Use | Direct |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Altimeter |
| Person 1 | |
| Function | Single Pilot |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Engineer Flight Crew Multiengine Flight Crew Instrument |
| Experience | Flight Crew Last 90 Days 70 Flight Crew Total 4000 Flight Crew Type 600 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Altitude Undershoot Deviation - Procedural Clearance |
Narrative:
Climbing out of ZZZ; I was instructed to turn direct to ZZZ1 passing 15;000. My altimeter in the airplane showed 15;000 and the airplane started a smart turn to ZZZ1. As soon as the plane started to turn; the controller asked what I was doing and why I was turning. I told her that I was turning toward ZZZ1 as instructed. She then told me that I was only at 14;900. I was very confused; because my altimeter showed 15;000. I then verified the altimeter setting; and it was correct on all three gauges. At that point I initiated an expeditious climb to reach 15;000. The controller and I had several back and forth discussions on the altitude. I rebooted the system on board; and after that; the altitude read correctly. The next day; I was in the same plane; and it did the very same thing to me again. This time I caught it before any terrain or compliance issues came into play. Rebooted the system; and did not have any issues after then.
Original NASA ASRS Text
Title: Pilot was queried by Controller why he was turning his EMB-600 Legacy aircraft at 14;900 instead of 15;000 as directed. Pilot noted all three altimeters did read 15;000. They rebooted the system onboard and the altimeter read correctly. The next day the same aircraft had the same condition. They rebooted the system and no further issues arose.
Narrative: Climbing out of ZZZ; I was instructed to turn direct to ZZZ1 passing 15;000. My Altimeter in the airplane showed 15;000 and the airplane started a smart turn to ZZZ1. As soon as the plane started to turn; the Controller asked what I was doing and why I was turning. I told her that I was turning toward ZZZ1 as instructed. She then told me that I was only at 14;900. I was very confused; because my Altimeter showed 15;000. I then verified the Altimeter setting; and it was correct on all three gauges. At that point I initiated an expeditious climb to reach 15;000. The Controller and I had several back and forth discussions on the altitude. I rebooted the system on board; and after that; the altitude read correctly. The next day; I was in the same plane; and it did the very same thing to me again. This time I caught it before any terrain or compliance issues came into play. Rebooted the system; and did not have any issues after then.
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.