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Flight crew of an mdt descended below assigned altitude due to not having their altimeter set to the current setting.
| Attributes | |
| ACN | 361320 |
| Time | |
| Date | 199702 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : ihd airport : pit |
| State Reference | PA |
| Altitude | msl bound lower : 6000 msl bound upper : 7000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : pit |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | arrival other arrival star : star |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 8000 flight time type : 600 |
| ASRS Report | 361320 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Was cleared to descend to 7000 ft. Was level at 7000 ft for a few moments when asked by ATC what our last assigned altitude was. Responded 7000 ft. Was told by ATC that our transponder was indicating 6000 ft. Was given current altimeter setting and found our altimeter setting was incorrect. Set correct altimeter setting and found that we were level at 6000 ft. Autoplt immediately started a climb to 7000 ft which was correctly set in assigned altitude. After climbing to 7000 ft was told by controller that there was no problem and that we were cleared pilots discretion back down to 6000 ft. Problem could have been avoided by asking controller to repeat current altimeter setting, if either crew member has any doubts about setting.
Original NASA ASRS Text
Title: FLC OF AN MDT DSNDED BELOW ASSIGNED ALT DUE TO NOT HAVING THEIR ALTIMETER SET TO THE CURRENT SETTING.
Narrative: WAS CLRED TO DSND TO 7000 FT. WAS LEVEL AT 7000 FT FOR A FEW MOMENTS WHEN ASKED BY ATC WHAT OUR LAST ASSIGNED ALT WAS. RESPONDED 7000 FT. WAS TOLD BY ATC THAT OUR XPONDER WAS INDICATING 6000 FT. WAS GIVEN CURRENT ALTIMETER SETTING AND FOUND OUR ALTIMETER SETTING WAS INCORRECT. SET CORRECT ALTIMETER SETTING AND FOUND THAT WE WERE LEVEL AT 6000 FT. AUTOPLT IMMEDIATELY STARTED A CLB TO 7000 FT WHICH WAS CORRECTLY SET IN ASSIGNED ALT. AFTER CLBING TO 7000 FT WAS TOLD BY CTLR THAT THERE WAS NO PROB AND THAT WE WERE CLRED PLTS DISCRETION BACK DOWN TO 6000 FT. PROB COULD HAVE BEEN AVOIDED BY ASKING CTLR TO REPEAT CURRENT ALTIMETER SETTING, IF EITHER CREW MEMBER HAS ANY DOUBTS ABOUT 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.