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Flight crew of an medium large transport overshot assigned crossing altitude on an arrival STAR due to a wrong altimeter setting.
| Attributes | |
| ACN | 467857 |
| Time | |
| Date | 200003 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | intersection : pivot |
| State Reference | MI |
| Altitude | msl bound lower : 9500 msl bound upper : 10000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zau.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival star : n/s |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 134 flight time total : 8200 flight time type : 196 |
| ASRS Report | 467857 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : cfi pilot : atp pilot : instrument pilot : multi engine |
| Experience | flight time last 90 days : 240 flight time total : 23000 flight time type : 240 |
| ASRS Report | 467690 |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance non adherence other |
| Independent Detector | other flight crewa other flight crewb |
| Consequence | Other |
| Supplementary | |
| Problem Areas | Aircraft Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
During an autoflt descent with the center autoplt in command and using flight level change, aircraft descended below its assigned leveloff altitude set in the altitude selector of 10000 ft MSL. When reaching 11000 ft, I announced 11000 ft for 10000 ft. Shortly after receiving an altitude alert light, with momentary confusion, I crosschecked the captain's altimeter and it read 9700 ft MSL. I leveled the aircraft off and climbed back to 10000 ft on the captain's altimeter, after xchking altimeter settings we reached the conclusion that the first officer's altimeter setting was incorrectly set to 30.36 instead of 29.36, while our attention was focused on the alarm. We noticed the altitude reached 9500 ft MSL. I disengaged the autoplt and hand flew the aircraft back to 10000 ft MSL with the proper altimeter setting. ATC made no comment.
Original NASA ASRS Text
Title: FLC OF AN MLG OVERSHOT ASSIGNED XING ALT ON AN ARR STAR DUE TO A WRONG ALTIMETER SETTING.
Narrative: DURING AN AUTOFLT DSCNT WITH THE CTR AUTOPLT IN COMMAND AND USING FLT LEVEL CHANGE, ACFT DSNDED BELOW ITS ASSIGNED LEVELOFF ALT SET IN THE ALT SELECTOR OF 10000 FT MSL. WHEN REACHING 11000 FT, I ANNOUNCED 11000 FT FOR 10000 FT. SHORTLY AFTER RECEIVING AN ALT ALERT LIGHT, WITH MOMENTARY CONFUSION, I XCHKED THE CAPT'S ALTIMETER AND IT READ 9700 FT MSL. I LEVELED THE ACFT OFF AND CLBED BACK TO 10000 FT ON THE CAPT'S ALTIMETER, AFTER XCHKING ALTIMETER SETTINGS WE REACHED THE CONCLUSION THAT THE FO'S ALTIMETER SETTING WAS INCORRECTLY SET TO 30.36 INSTEAD OF 29.36, WHILE OUR ATTN WAS FOCUSED ON THE ALARM. WE NOTICED THE ALT REACHED 9500 FT MSL. I DISENGAGED THE AUTOPLT AND HAND FLEW THE ACFT BACK TO 10000 FT MSL WITH THE PROPER ALTIMETER SETTING. ATC MADE NO COMMENT.
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.