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An air carrier flight crew flying a B737 fails to set their altimeter properly resulting in an altitude overshoot.
| Attributes | |
| ACN | 454870 |
| Time | |
| Date | 199911 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : obk.vor |
| State Reference | IL |
| Altitude | msl bound lower : 18000 msl bound upper : 11000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zau.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other vortac |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival star : bdf3 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : cfi pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 200 flight time total : 4500 flight time type : 200 |
| ASRS Report | 454870 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : multi engine pilot : atp |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance non adherence : far other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : provided flight assist flight crew : became reoriented flight crew : returned to original clearance |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were inbound to ord from the south of the STAR. We were given a crossing restr of 45 mi south of ord at 11000 ft and the current altimeter. The altimeter setting the captain and I both thought we heard was 30.31. We both set 30.31 in our altimeters at FL180 and continued to 11000 ft. After leveling at 11000 ft the controller asked us to check our altimeter at 30.01. He said he showed us lower than 11000 ft. With the new setting we leveled at 11000 ft. The controller stated that it was not a problem. The captain and I both thought we heard 30.31 and we should have checked it with our ATIS information to verify. Lesson learned.
Original NASA ASRS Text
Title: AN ACR FLC FLYING A B737 FAILS TO SET THEIR ALTIMETER PROPERLY RESULTING IN AN ALT OVERSHOOT.
Narrative: WE WERE INBOUND TO ORD FROM THE S OF THE STAR. WE WERE GIVEN A XING RESTR OF 45 MI S OF ORD AT 11000 FT AND THE CURRENT ALTIMETER. THE ALTIMETER SETTING THE CAPT AND I BOTH THOUGHT WE HEARD WAS 30.31. WE BOTH SET 30.31 IN OUR ALTIMETERS AT FL180 AND CONTINUED TO 11000 FT. AFTER LEVELING AT 11000 FT THE CTLR ASKED US TO CHK OUR ALTIMETER AT 30.01. HE SAID HE SHOWED US LOWER THAN 11000 FT. WITH THE NEW SETTING WE LEVELED AT 11000 FT. THE CTLR STATED THAT IT WAS NOT A PROB. THE CAPT AND I BOTH THOUGHT WE HEARD 30.31 AND WE SHOULD HAVE CHKED IT WITH OUR ATIS INFO TO VERIFY. LESSON LEARNED.
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.