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Captain read wrong altimeter setting and flight crew set altimeter to 30 pt 31 when it was actually 29 pt 31. Aircraft was 1000' lower than altimeter in cockpit showed.
| Attributes | |
| ACN | 128853 |
| Time | |
| Date | 198911 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : gdm |
| State Reference | MA |
| Altitude | msl bound lower : 10000 msl bound upper : 11000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zbw |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other descent other |
| Route In Use | arrival other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : atp pilot : commercial |
| Experience | flight time last 90 days : 50 flight time total : 10000 flight time type : 1500 |
| ASRS Report | 128853 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 4000 flight time type : 180 |
| ASRS Report | 128857 |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Level 11,000, slowing to 250 KTS approaching bronc intersection we were notified by boston center that mode C showed us at 10,000. After some confusion we determined that we had set our altimeters at 30.31 when the altimeter was actually 29.31. Boston cleared us to remain at 10,000 and switched us to boston approach. The flight continued to boston without further incident. I had written the altimeter as '.31' when copying the ATIS and told the copilot that it was 30.31 on descent through FL180. When boston center gave us the descent out of FL240 a F/a was in the cockpit giving us a message for relay to company operations and we both missed the altimeter setting when it was given.
Original NASA ASRS Text
Title: CAPT READ WRONG ALTIMETER SETTING AND FLT CREW SET ALTIMETER TO 30 PT 31 WHEN IT WAS ACTUALLY 29 PT 31. ACFT WAS 1000' LOWER THAN ALTIMETER IN COCKPIT SHOWED.
Narrative: LEVEL 11,000, SLOWING TO 250 KTS APCHING BRONC INTXN WE WERE NOTIFIED BY BOSTON CENTER THAT MODE C SHOWED US AT 10,000. AFTER SOME CONFUSION WE DETERMINED THAT WE HAD SET OUR ALTIMETERS AT 30.31 WHEN THE ALTIMETER WAS ACTUALLY 29.31. BOSTON CLRED US TO REMAIN AT 10,000 AND SWITCHED US TO BOSTON APCH. THE FLT CONTINUED TO BOSTON WITHOUT FURTHER INCIDENT. I HAD WRITTEN THE ALTIMETER AS '.31' WHEN COPYING THE ATIS AND TOLD THE COPLT THAT IT WAS 30.31 ON DSCNT THROUGH FL180. WHEN BOSTON CENTER GAVE US THE DSCNT OUT OF FL240 A F/A WAS IN THE COCKPIT GIVING US A MESSAGE FOR RELAY TO COMPANY OPERATIONS AND WE BOTH MISSED THE ALTIMETER SETTING WHEN IT WAS GIVEN.
Data retrieved from NASA's ASRS site as of August 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.