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Crj-50 captain reported rejecting takeoff at 85 KTS when his altimeter setting spontaneously changed from 30.01 to 29.89.
| Attributes | |
| ACN | 1027612 |
| Time | |
| Date | 201208 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Regional Jet CL65 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Takeoff |
| Component | |
| Aircraft Component | Altimeter |
| Person 1 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
[We] rejected takeoff at 85 KTS because the captain's altimeter setting spontaneously changed from 30.01 inches to 29.89 inches during the takeoff roll. I saw the displayed altitude change and the yellow neg flag also popped up because the different altimeter setting placed us below sea level. Unknown what caused the malfunction.
Original NASA ASRS Text
Title: CRJ-50 Captain reported rejecting takeoff at 85 KTS when his altimeter setting spontaneously changed from 30.01 to 29.89.
Narrative: [We] rejected takeoff at 85 KTS because the Captain's altimeter setting spontaneously changed from 30.01 inches to 29.89 inches during the takeoff roll. I saw the displayed altitude change and the yellow NEG flag also popped up because the different altimeter setting placed us below sea level. Unknown what caused the malfunction.
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.