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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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A B737 cruises 300 ft below assigned cruise altitude because of wrong altimeter setting being used in ZSE, wa, airspace.
| Attributes | |
| ACN | 396040 |
| Time | |
| Date | 199803 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : rbg |
| State Reference | OR |
| Altitude | msl bound lower : 34700 msl bound upper : 35000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zse |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 5000 flight time type : 1000 |
| ASRS Report | 396040 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : undershoot non adherence : clearance other anomaly other |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Altimeters were still set to qnh, resulting in aircraft being 300 ft low while at cruise altitude of FL350. Discovered the problem when ATC advised that aircraft's altitude was 300 ft below FL350.
Original NASA ASRS Text
Title: A B737 CRUISES 300 FT BELOW ASSIGNED CRUISE ALT BECAUSE OF WRONG ALTIMETER SETTING BEING USED IN ZSE, WA, AIRSPACE.
Narrative: ALTIMETERS WERE STILL SET TO QNH, RESULTING IN ACFT BEING 300 FT LOW WHILE AT CRUISE ALT OF FL350. DISCOVERED THE PROB WHEN ATC ADVISED THAT ACFT'S ALT WAS 300 FT BELOW FL350.
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.