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An air carrier flight crew states that a possible altitude deviation may have resulted from a momentary altimeter lag.
| Attributes | |
| ACN | 303360 |
| Time | |
| Date | 199504 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : dfw |
| State Reference | TX |
| Altitude | msl bound lower : 11000 msl bound upper : 11000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : dfw |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Route In Use | enroute airway : dfw |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time total : 8000 flight time type : 190 |
| ASRS Report | 303360 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
During descent into dfw, may have descended more than 300 ft from assigned altitude. No corrective action was taken, no deviation was acknowledged from ATC. We did not say anything as we were not sure if an actual altitude deviation had occurred.
Original NASA ASRS Text
Title: AN ACR FLC STATES THAT A POSSIBLE ALTDEV MAY HAVE RESULTED FROM A MOMENTARY ALTIMETER LAG.
Narrative: DURING DSCNT INTO DFW, MAY HAVE DSNDED MORE THAN 300 FT FROM ASSIGNED ALT. NO CORRECTIVE ACTION WAS TAKEN, NO DEV WAS ACKNOWLEDGED FROM ATC. WE DID NOT SAY ANYTHING AS WE WERE NOT SURE IF AN ACTUAL ALTDEV HAD OCCURRED.
Data retrieved from NASA's ASRS site as of July 2007 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.