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A private jet climbs to FL250 without resetting the altimeters to 29 pt 92. ATC calls with a notice of aircraft being 400 ft too low.
| Attributes | |
| ACN | 426790 |
| Time | |
| Date | 199901 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : har |
| State Reference | PA |
| Altitude | msl bound lower : 24600 msl bound upper : 25000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Operator | general aviation : personal |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : cfi pilot : commercial |
| Experience | flight time last 90 days : 45 flight time total : 13000 flight time type : 1800 |
| ASRS Report | 426790 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | altitude deviation : undershoot non adherence : far non adherence other other anomaly other |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | Pilot Deviation |
Narrative:
The PF (aircraft owner) in left seat, myself in right seat. Checklist item for resetting altimeters to 29.92 was missed due to a short period of high workload with failure to return to checklist at the appropriate point. ATC advised us we were 400 ft low and to check altimeters. They were checked and reset to the correct setting. The conclusion I have drawn is that when using manual checklist, when there is a break due to momentary high workload sits (ie, communications, heading, altitude changes) or whatever else might contribute to the break that checklist should be restarted from its beginning and accomplished, completed with, rechked in its entirety so that no item will be missed regardless of the break, including an altimeter setting.
Original NASA ASRS Text
Title: A PVT JET CLBS TO FL250 WITHOUT RESETTING THE ALTIMETERS TO 29 PT 92. ATC CALLS WITH A NOTICE OF ACFT BEING 400 FT TOO LOW.
Narrative: THE PF (ACFT OWNER) IN L SEAT, MYSELF IN R SEAT. CHKLIST ITEM FOR RESETTING ALTIMETERS TO 29.92 WAS MISSED DUE TO A SHORT PERIOD OF HIGH WORKLOAD WITH FAILURE TO RETURN TO CHKLIST AT THE APPROPRIATE POINT. ATC ADVISED US WE WERE 400 FT LOW AND TO CHK ALTIMETERS. THEY WERE CHKED AND RESET TO THE CORRECT SETTING. THE CONCLUSION I HAVE DRAWN IS THAT WHEN USING MANUAL CHKLIST, WHEN THERE IS A BREAK DUE TO MOMENTARY HIGH WORKLOAD SITS (IE, COMS, HDG, ALT CHANGES) OR WHATEVER ELSE MIGHT CONTRIBUTE TO THE BREAK THAT CHKLIST SHOULD BE RESTARTED FROM ITS BEGINNING AND ACCOMPLISHED, COMPLETED WITH, RECHKED IN ITS ENTIRETY SO THAT NO ITEM WILL BE MISSED REGARDLESS OF THE BREAK, INCLUDING AN ALTIMETER SETTING.
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.