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Captain of an large transport first undershot descent altitude due to using the wrong altimeter setting. And then overshot assigned arrival altitude due to the autoplt not capturing the set altitude.
| Attributes | |
| ACN | 360760 |
| Time | |
| Date | 199702 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : esl |
| State Reference | WV |
| Altitude | msl bound lower : 14700 msl bound upper : 15200 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | arrival other arrival star : star enroute airway : zdc |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 13000 flight time type : 1300 |
| ASRS Report | 360760 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : overshoot altitude deviation : undershoot non adherence : clearance other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Out of FL180, 30.02 was set in the altimeter from misread ATIS. Aircraft cleared to 15000 ft. As aircraft captured altitude for leveling at 15000 ft, controller gave us 30.20 as altimeter setting and aircraft leveled off high and did not recapture new altitude. I selected 200 FPM down on vertical speed selector to capture 15000 ft, which the aircraft did not do. Having assumed the aircraft would level, I became distraction and did not notice the descent till altitude alerter went off 300 ft low.
Original NASA ASRS Text
Title: CAPT OF AN LGT FIRST UNDERSHOT DSCNT ALT DUE TO USING THE WRONG ALTIMETER SETTING. AND THEN OVERSHOT ASSIGNED ARR ALT DUE TO THE AUTOPLT NOT CAPTURING THE SET ALT.
Narrative: OUT OF FL180, 30.02 WAS SET IN THE ALTIMETER FROM MISREAD ATIS. ACFT CLRED TO 15000 FT. AS ACFT CAPTURED ALT FOR LEVELING AT 15000 FT, CTLR GAVE US 30.20 AS ALTIMETER SETTING AND ACFT LEVELED OFF HIGH AND DID NOT RECAPTURE NEW ALT. I SELECTED 200 FPM DOWN ON VERT SPD SELECTOR TO CAPTURE 15000 FT, WHICH THE ACFT DID NOT DO. HAVING ASSUMED THE ACFT WOULD LEVEL, I BECAME DISTR AND DID NOT NOTICE THE DSCNT TILL ALT ALERTER WENT OFF 300 FT LOW.
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.