 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
MD88 descending to FL180. Captain, PF, set local altimeter and descended to 17600 ft before catching error.
| Attributes | |
| ACN | 360780 |
| Time | |
| Date | 199702 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : swf |
| State Reference | NY |
| Altitude | msl bound lower : 17600 msl bound upper : 18000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny |
| Operator | common carrier : air carrier |
| Make Model Name | MD-88 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | cruise other descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 5000 flight time type : 400 |
| ASRS Report | 360780 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 110 flight time total : 8000 flight time type : 320 |
| ASRS Report | 360776 |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : far non adherence : published procedure non adherence : clearance other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : exited penetrated airspace |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On descent to FL180 captain set local altimeter (which was very high, approximately 30.60) and aircraft descended to approximately 17600 ft (as seen on first officer's altimeter set to 24.92). It took approximately 3 seconds to realize the error and recover to FL180. We learned the importance of xchking the other pilot's actions and monitoring the autoplt on level off. I actually saw the jet descending through FL180 but didn't take corrective action, (disconnecting the autoplt/hitting altitude hold). Captain was briefing the approach and inadvertently set local altimeter.
Original NASA ASRS Text
Title: MD88 DSNDING TO FL180. CAPT, PF, SET LCL ALTIMETER AND DSNDED TO 17600 FT BEFORE CATCHING ERROR.
Narrative: ON DSCNT TO FL180 CAPT SET LCL ALTIMETER (WHICH WAS VERY HIGH, APPROX 30.60) AND ACFT DSNDED TO APPROX 17600 FT (AS SEEN ON FO'S ALTIMETER SET TO 24.92). IT TOOK APPROX 3 SECONDS TO REALIZE THE ERROR AND RECOVER TO FL180. WE LEARNED THE IMPORTANCE OF XCHKING THE OTHER PLT'S ACTIONS AND MONITORING THE AUTOPLT ON LEVEL OFF. I ACTUALLY SAW THE JET DSNDING THROUGH FL180 BUT DIDN'T TAKE CORRECTIVE ACTION, (DISCONNECTING THE AUTOPLT/HITTING ALT HOLD). CAPT WAS BRIEFING THE APCH AND INADVERTENTLY SET LCL ALTIMETER.
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.