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A B767-200 descending into atl airspace descends below assigned altitude as the altimeter is not reset to barometric pressure when leaving the transition altitude.
| Attributes | |
| ACN | 386959 |
| Time | |
| Date | 199711 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : atl |
| State Reference | GA |
| Altitude | msl bound lower : 11700 msl bound upper : 12000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : ztl |
| Operator | common carrier : air carrier |
| Make Model Name | B767-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | arrival star : star |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : atp pilot : flight engineer pilot : instrument |
| Experience | flight time last 90 days : 200 flight time total : 11000 flight time type : 3500 |
| ASRS Report | 386959 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial pilot : atp |
| ASRS Report | 386960 |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Both pilots distraction going through FL180. Failed to reset altimeters from 29.92 to 29.49. As a result, aircraft leveled off 300 ft low at 11700 ft instead of 12000 ft. Heavy traffic, numerous vectors and change in clearance altitude and fix going through transition altitude contributed to distraction.
Original NASA ASRS Text
Title: A B767-200 DSNDING INTO ATL AIRSPACE DSNDS BELOW ASSIGNED ALT AS THE ALTIMETER IS NOT RESET TO BAROMETRIC PRESSURE WHEN LEAVING THE TRANSITION ALT.
Narrative: BOTH PLTS DISTR GOING THROUGH FL180. FAILED TO RESET ALTIMETERS FROM 29.92 TO 29.49. AS A RESULT, ACFT LEVELED OFF 300 FT LOW AT 11700 FT INSTEAD OF 12000 FT. HVY TFC, NUMEROUS VECTORS AND CHANGE IN CLRNC ALT AND FIX GOING THROUGH TRANSITION ALT CONTRIBUTED TO DISTR.
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.