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B747 cargo flight crew descended below the intermediate approach altitude due to having the wrong altimeter setting. Approach controller noticed the error and gave the current setting.
| Attributes | |
| ACN | 527603 |
| Time | |
| Date | 200110 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : anc.airport |
| State Reference | AK |
| Altitude | msl bound lower : 1100 msl bound upper : 1600 |
| Environment | |
| Flight Conditions | IMC |
| Weather Elements | Snow Ice Fog |
| Light | Daylight |
| Aircraft 2 | |
| Controlling Facilities | tracon : a11.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B747-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude descent : approach |
| Route In Use | arrival : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain |
| Qualification | pilot : multi engine pilot : atp pilot : cfi pilot : flight engineer |
| Experience | flight time last 90 days : 200 flight time total : 16500 flight time type : 8500 |
| ASRS Report | 527603 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time total : 8600 flight time type : 300 |
| ASRS Report | 528113 |
| Events | |
| Anomaly | altitude deviation : overshoot inflight encounter other non adherence : clearance non adherence : company policies non adherence : published procedure other anomaly other other spatial deviation |
| Independent Detector | atc equipment : msaw other controllera |
| Resolutory Action | controller : issued alert flight crew : returned to assigned altitude other |
| Supplementary | |
| Problem Areas | Environmental Factor Flight Crew Human Performance Weather ATC Human Performance Company |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
While descending into anc for an approach, the first officer was flying. The second officer copied the WX information from the ATIS. However, the altimeter setting was written down in error. This ATIS information was passed fwd to the captain and first officer descending through transition altitude, this incorrect altitude setting was set into both the captain and first officer altimeter. After handoff by anc center to anc approach, I reported our clearance altitude and ATIS information. Anc approach gave us further descent clearance and advised that next information was current. The second officer obtained next ATIS, but again copied that wrong altimeter setting and passed the information fwd. The second officer had written down an altimeter setting of 29.24. We were cleared to level at 2000 ft. Anc approach reported that he showed us low, cleared us to descend to 1600 ft and to check ATIS information. I instructed the second officer to check the ATIS once again as the first officer was descending slowly. At this time, anc approach again reported that we were low and to climb to 1600 ft and check altimeters 29.24. We began an immediate climb while setting the proper altimeter setting. Our altitude deviation was approximately 500 ft. From this point, the flight was continued to destination without further incident.
Original NASA ASRS Text
Title: B747 CARGO FLC DSNDED BELOW THE INTERMEDIATE APCH ALT DUE TO HAVING THE WRONG ALTIMETER SETTING. APCH CTLR NOTICED THE ERROR AND GAVE THE CURRENT SETTING.
Narrative: WHILE DSNDING INTO ANC FOR AN APCH, THE FO WAS FLYING. THE SECOND OFFICER COPIED THE WX INFO FROM THE ATIS. HOWEVER, THE ALTIMETER SETTING WAS WRITTEN DOWN IN ERROR. THIS ATIS INFO WAS PASSED FWD TO THE CAPT AND FO DSNDING THROUGH TRANSITION ALT, THIS INCORRECT ALT SETTING WAS SET INTO BOTH THE CAPT AND FO ALTIMETER. AFTER HANDOFF BY ANC CENTER TO ANC APCH, I RPTED OUR CLRNC ALT AND ATIS INFO. ANC APCH GAVE US FURTHER DSCNT CLRNC AND ADVISED THAT NEXT INFO WAS CURRENT. THE SECOND OFFICER OBTAINED NEXT ATIS, BUT AGAIN COPIED THAT WRONG ALTIMETER SETTING AND PASSED THE INFO FWD. THE SECOND OFFICER HAD WRITTEN DOWN AN ALTIMETER SETTING OF 29.24. WE WERE CLRED TO LEVEL AT 2000 FT. ANC APCH RPTED THAT HE SHOWED US LOW, CLRED US TO DSND TO 1600 FT AND TO CHECK ATIS INFO. I INSTRUCTED THE SECOND OFFICER TO CHECK THE ATIS ONCE AGAIN AS THE FO WAS DSNDING SLOWLY. AT THIS TIME, ANC APCH AGAIN RPTED THAT WE WERE LOW AND TO CLIMB TO 1600 FT AND CHECK ALTIMETERS 29.24. WE BEGAN AN IMMEDIATE CLIMB WHILE SETTING THE PROPER ALTIMETER SETTING. OUR ALTDEV WAS APPROX 500 FT. FROM THIS POINT, THE FLT WAS CONTINUED TO DEST WITHOUT FURTHER 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.