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Wrong altimeter setting and reporter aircraft descended below assigned altitude. Reporter claims center controller gave 30 pt 43 and approach controller said it was 29 pt 54. Unknown why the miscom on the setting.
| Attributes | |
| ACN | 328240 |
| Time | |
| Date | 199602 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : mrb |
| State Reference | WV |
| Altitude | msl bound lower : 10000 msl bound upper : 11000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : iad |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | 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 : 90 flight time total : 22000 flight time type : 90 |
| ASRS Report | 328240 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : overshoot other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Center gave descend to 11000 ft and altimeter 30.43. Then told to call iad approach. On level off at 11000 ft approach asked what altitude are you cleared to descend? I replied, 11000 ft and altitude is 30.43. Approach immediately said, I show you at 10000 ft and altimeter is 29.54. Then cleared to maintain 10000 ft. I was in process of obtaining ATIS during this time, and had not yet had time to compare altimeter setting being used to altimeter on ATIS. Don't know where center got altitude of 30.43.
Original NASA ASRS Text
Title: WRONG ALTIMETER SETTING AND RPTR ACFT DSNDED BELOW ASSIGNED ALT. RPTR CLAIMS CTR CTLR GAVE 30 PT 43 AND APCH CTLR SAID IT WAS 29 PT 54. UNKNOWN WHY THE MISCOM ON THE SETTING.
Narrative: CTR GAVE DSND TO 11000 FT AND ALTIMETER 30.43. THEN TOLD TO CALL IAD APCH. ON LEVEL OFF AT 11000 FT APCH ASKED WHAT ALT ARE YOU CLRED TO DSND? I REPLIED, 11000 FT AND ALT IS 30.43. APCH IMMEDIATELY SAID, I SHOW YOU AT 10000 FT AND ALTIMETER IS 29.54. THEN CLRED TO MAINTAIN 10000 FT. I WAS IN PROCESS OF OBTAINING ATIS DURING THIS TIME, AND HAD NOT YET HAD TIME TO COMPARE ALTIMETER SETTING BEING USED TO ALTIMETER ON ATIS. DON'T KNOW WHERE CTR GOT ALT OF 30.43.
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.