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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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The flight crew erroneously set the altimeter to 30.45 instead of 29.45 descending through FL180 for 14000 ft. Therefore, the flight crew descended to an altitude 1000 ft below their assigned 14000 ft altitude before the ARTCC suggested they had the wrong altimeter setting.
| Attributes | |
| ACN | 326600 |
| Time | |
| Date | 199601 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : obk |
| State Reference | IL |
| Altitude | msl bound lower : 13000 msl bound upper : 14000 |
| Aircraft 1 | |
| Controlling Facilities | artcc : zau |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport |
| Flight Phase | descent other |
| Route In Use | arrival other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 326600 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| ASRS Report | 326602 |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance other anomaly other |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance flight crew : returned to intended course or assigned course other |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Pullman arrival. Just inside pivot we received a change in altitude, speed, and heading. I reset my altimeter to QFE and crosschecked with the center altimeter and saw what I expected to see, 660 ft difference. I called out 660 ft difference as per the checklist. Then I completed the level off using the center altimeter. Shortly thereafter the controller asked us to check the altimeter setting. It was set to 30.45 instead of 29.45, 1000 ft off. I failed to notice or correctly backup the correct center altimeter setting.
Original NASA ASRS Text
Title: THE FLC ERRONEOUSLY SET THE ALTIMETER TO 30.45 INSTEAD OF 29.45 DSNDING THROUGH FL180 FOR 14000 FT. THEREFORE, THE FLC DSNDED TO AN ALT 1000 FT BELOW THEIR ASSIGNED 14000 FT ALT BEFORE THE ARTCC SUGGESTED THEY HAD THE WRONG ALTIMETER SETTING.
Narrative: PULLMAN ARR. JUST INSIDE PIVOT WE RECEIVED A CHANGE IN ALT, SPD, AND HDG. I RESET MY ALTIMETER TO QFE AND XCHKED WITH THE CTR ALTIMETER AND SAW WHAT I EXPECTED TO SEE, 660 FT DIFFERENCE. I CALLED OUT 660 FT DIFFERENCE AS PER THE CHKLIST. THEN I COMPLETED THE LEVEL OFF USING THE CTR ALTIMETER. SHORTLY THEREAFTER THE CTLR ASKED US TO CHK THE ALTIMETER SETTING. IT WAS SET TO 30.45 INSTEAD OF 29.45, 1000 FT OFF. I FAILED TO NOTICE OR CORRECTLY BACKUP THE CORRECT CTR ALTIMETER SETTING.
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.