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Captain's report regarding a DC10 on descent into sea. The crew had an altitude overshoot because the altimeter had been misset at 30.54 instead of 29.54.
| Attributes | |
| ACN | 429126 |
| Time | |
| Date | 199902 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : sea.airport |
| State Reference | WA |
| Altitude | msl single value : 16000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zse.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | DC-10 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : enroute altitude change |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 12000 flight time type : 3000 |
| ASRS Report | 429126 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument pilot : multi engine |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance non adherence other |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On descent into seattle we were cleared to 16000 ft. I had preset my standby altimeter upon learning the local altimeter from the ACARS printout while still in cruise and then set my primary altimeter when passing through FL180. I called for the in-range checklist a little late after passing FL180. The first officer and so both called going below 16000 ft. I found that I had set 30.54 instead of the correct 29.54. My mistake of setting the wrong altimeter on the standby altimeter was xferred to the primary altimeter and further exacerbated by the late in-range checklist call, which would have caught the error, had it been made on time. Fatigue was also a factor. The lesson learned was to xchk the altimeter setting when setting the primary altimeter and that the in-range checklist needs to be called for in a timely manner.
Original NASA ASRS Text
Title: CAPT'S RPT REGARDING A DC10 ON DSCNT INTO SEA. THE CREW HAD AN ALT OVERSHOOT BECAUSE THE ALTIMETER HAD BEEN MISSET AT 30.54 INSTEAD OF 29.54.
Narrative: ON DSCNT INTO SEATTLE WE WERE CLRED TO 16000 FT. I HAD PRESET MY STANDBY ALTIMETER UPON LEARNING THE LOCAL ALTIMETER FROM THE ACARS PRINTOUT WHILE STILL IN CRUISE AND THEN SET MY PRIMARY ALTIMETER WHEN PASSING THROUGH FL180. I CALLED FOR THE IN-RANGE CHKLIST A LITTLE LATE AFTER PASSING FL180. THE FO AND SO BOTH CALLED GOING BELOW 16000 FT. I FOUND THAT I HAD SET 30.54 INSTEAD OF THE CORRECT 29.54. MY MISTAKE OF SETTING THE WRONG ALTIMETER ON THE STANDBY ALTIMETER WAS XFERRED TO THE PRIMARY ALTIMETER AND FURTHER EXACERBATED BY THE LATE IN-RANGE CHKLIST CALL, WHICH WOULD HAVE CAUGHT THE ERROR, HAD IT BEEN MADE ON TIME. FATIGUE WAS ALSO A FACTOR. THE LESSON LEARNED WAS TO XCHK THE ALTIMETER SETTING WHEN SETTING THE PRIMARY ALTIMETER AND THAT THE IN-RANGE CHKLIST NEEDS TO BE CALLED FOR IN A TIMELY MANNER.
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.