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An air carrier flight crew descend below 9000 ft assigned due to an incorrect altimeter setting. The approach controller caught the error and corrected the flight crew.
| Attributes | |
| ACN | 323880 |
| Time | |
| Date | 199512 |
| Day | Tue |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : slc |
| State Reference | UT |
| Altitude | msl bound lower : 8500 msl bound upper : 9000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : slc |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent 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 : 15000 flight time type : 6000 |
| ASRS Report | 323880 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 175 flight time total : 8500 flight time type : 175 |
| ASRS Report | 323879 |
| Events | |
| Anomaly | altitude deviation : overshoot inflight encounter : weather non adherence : far non adherence : clearance other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | other other |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
ATIS was received during the descent phase of flight in moderate icing conditions. Ice on the receiver antenna caused the transmission to be broken. The altimeter setting was copied as 30.05. It was actually 29.65. The approach controller reported the altitude deviation to the crew and we corrected immediately. Thanks to a very astute controller a potential conflict was avoided. Supplemental information from acn 323879: the copy of the ATIS altimeter setting was incorrect. I believe more attention paid to the correct copying of ATIS information would have prevented this incident.
Original NASA ASRS Text
Title: AN ACR FLC DSND BELOW 9000 FT ASSIGNED DUE TO AN INCORRECT ALTIMETER SETTING. THE APCH CTLR CAUGHT THE ERROR AND CORRECTED THE FLC.
Narrative: ATIS WAS RECEIVED DURING THE DSCNT PHASE OF FLT IN MODERATE ICING CONDITIONS. ICE ON THE RECEIVER ANTENNA CAUSED THE XMISSION TO BE BROKEN. THE ALTIMETER SETTING WAS COPIED AS 30.05. IT WAS ACTUALLY 29.65. THE APCH CTLR RPTED THE ALTDEV TO THE CREW AND WE CORRECTED IMMEDIATELY. THANKS TO A VERY ASTUTE CTLR A POTENTIAL CONFLICT WAS AVOIDED. SUPPLEMENTAL INFO FROM ACN 323879: THE COPY OF THE ATIS ALTIMETER SETTING WAS INCORRECT. I BELIEVE MORE ATTN PAID TO THE CORRECT COPYING OF ATIS INFO WOULD HAVE PREVENTED THIS INCIDENT.
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.