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A B737-200 flight crew levels off 400 ft below their assigned altitude while 100 mi north of gso, nc. ARTCC at ZTL catches this error.
| Attributes | |
| ACN | 458520 |
| Time | |
| Date | 199912 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : gso.airport |
| State Reference | NC |
| Altitude | msl bound lower : 32600 msl bound upper : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : ztl.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other vortac |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 240 flight time total : 13000 flight time type : 600 |
| ASRS Report | 458520 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : undershoot non adherence : clearance non adherence : published procedure other anomaly other |
| Independent Detector | atc equipment other atc equipment : radar mode c other controllera |
| Resolutory Action | controller : issued advisory |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
As we leveled at our cruise altitude of FL330, ATC notified us that their radar showed us 400 ft low (FL326). We then noticed that our altimeters were still set at the bwi local altimeter setting instead of 29.92. We then reset our altimeters to 29.92 and continued the climb to FL330. The best solution to the problem is to make sure both pilots xchk each other out of FL180 and make sure both pilots are not doing anything else until we level at our cruise altitude (eg, getting WX, etc).
Original NASA ASRS Text
Title: A B737-200 FLC LEVELS OFF 400 FT BELOW THEIR ASSIGNED ALT WHILE 100 MI N OF GSO, NC. ARTCC AT ZTL CATCHES THIS ERROR.
Narrative: AS WE LEVELED AT OUR CRUISE ALT OF FL330, ATC NOTIFIED US THAT THEIR RADAR SHOWED US 400 FT LOW (FL326). WE THEN NOTICED THAT OUR ALTIMETERS WERE STILL SET AT THE BWI LCL ALTIMETER SETTING INSTEAD OF 29.92. WE THEN RESET OUR ALTIMETERS TO 29.92 AND CONTINUED THE CLB TO FL330. THE BEST SOLUTION TO THE PROB IS TO MAKE SURE BOTH PLTS XCHK EACH OTHER OUT OF FL180 AND MAKE SURE BOTH PLTS ARE NOT DOING ANYTHING ELSE UNTIL WE LEVEL AT OUR CRUISE ALT (EG, GETTING WX, ETC).
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.