 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Air carrier large transport was given the wrong altimeter setting by ARTCC and levelled off 700' low. Error detected by approach controller and confirmed by unknown aircraft on similar descent.
| Attributes | |
| ACN | 100212 |
| Time | |
| Date | 198812 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : ord |
| State Reference | IL |
| Altitude | msl bound lower : 9300 msl bound upper : 10000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zau |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | cruise other descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : commercial pilot : flight engineer |
| Experience | flight time last 90 days : 210 flight time total : 9000 flight time type : 2500 |
| ASRS Report | 100212 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : flight engineer pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 12800 flight time type : 6000 |
| ASRS Report | 100164 |
| Events | |
| Anomaly | altitude deviation : overshoot other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Deviation |
Narrative:
Descending from FL240 to 17000' the center controller gave us 30.53 as the altimeter setting. This was set individually on all altimeters and altitude alert by individual crew members. A further descent was given to 10000' and we were switched to ord approach control. Reporting in at 10000' we were told altitude readout indicated 9300' MSL, not 10000'. Switching transponders gave the same reading. We then asked approach for the altimeter setting and he gave us 29.54, this was then confirmed by ATIS as 29.53. At this time another aircraft checked on frequency and reported the same problem. We reset the connect altimeter setting and the flight continued to approach and landing at ord. We requested that approach control contact the previous controller and rectify the situation.
Original NASA ASRS Text
Title: ACR LGT WAS GIVEN THE WRONG ALTIMETER SETTING BY ARTCC AND LEVELLED OFF 700' LOW. ERROR DETECTED BY APCH CTLR AND CONFIRMED BY UNKNOWN ACFT ON SIMILAR DESCENT.
Narrative: DSNDING FROM FL240 TO 17000' THE CENTER CTLR GAVE US 30.53 AS THE ALTIMETER SETTING. THIS WAS SET INDIVIDUALLY ON ALL ALTIMETERS AND ALT ALERT BY INDIVIDUAL CREW MEMBERS. A FURTHER DSCNT WAS GIVEN TO 10000' AND WE WERE SWITCHED TO ORD APCH CTL. RPTING IN AT 10000' WE WERE TOLD ALT READOUT INDICATED 9300' MSL, NOT 10000'. SWITCHING TRANSPONDERS GAVE THE SAME READING. WE THEN ASKED APCH FOR THE ALTIMETER SETTING AND HE GAVE US 29.54, THIS WAS THEN CONFIRMED BY ATIS AS 29.53. AT THIS TIME ANOTHER ACFT CHKED ON FREQ AND RPTED THE SAME PROB. WE RESET THE CONNECT ALTIMETER SETTING AND THE FLT CONTINUED TO APCH AND LNDG AT ORD. WE REQUESTED THAT APCH CTL CONTACT THE PREVIOUS CTLR AND RECTIFY THE SITUATION.
Data retrieved from NASA's ASRS site as of August 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.