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Air carrier large transport altitude deviation excursion from clearance altitude in response to wrong call sign issued by controller.
| Attributes | |
| ACN | 193557 |
| Time | |
| Date | 199111 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : bdf airport : ord |
| State Reference | IL |
| Altitude | msl bound lower : 11000 msl bound upper : 12600 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | other |
| Route In Use | enroute airway : zau |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : commercial |
| Experience | flight time last 90 days : 200 flight time total : 7000 flight time type : 2000 |
| ASRS Report | 193557 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 50 flight time total : 4000 flight time type : 20 |
| ASRS Report | 193554 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Ambiguous |
| Air Traffic Incident | Operational Deviation Pilot Deviation other |
Narrative:
Company axab was cleared to shooze intersection at 11000 ft and instructed to hold as published. I thought I heard company agd being cleared to hold and a descent clearance to 11000 also. Just as I was going to question this, the controller gave us a clearance to climb to 13000 ft and an efc of XX00Z. As we began to climb to 13000 and at 12600 was interrupted and told to descend back to 11000, our assigned altitude. I personally read back the climb clearance. I think the controller gave us, axab, the clearance for company agd. Supplemental information from acn 193554: radar failure at ord. We were assigned holding at an intersection with 3 other jets. We were originally assigned 11000 ft and then we thought we were assigned 13000 ft. It made sense because on TCASII we could see another aircraft at 11000 ft at the other end of the holding fix. The captain repeated the altitude assignment. We never got closer than 10 mi before the aircraft were established at 11 and 13.
Original NASA ASRS Text
Title: ACR LGT ALTDEV EXCURSION FROM CLRNC ALT IN RESPONSE TO WRONG CALL SIGN ISSUED BY CTLR.
Narrative: COMPANY AXAB WAS CLRED TO SHOOZE INTXN AT 11000 FT AND INSTRUCTED TO HOLD AS PUBLISHED. I THOUGHT I HEARD COMPANY AGD BEING CLRED TO HOLD AND A DSCNT CLRNC TO 11000 ALSO. JUST AS I WAS GOING TO QUESTION THIS, THE CTLR GAVE US A CLRNC TO CLB TO 13000 FT AND AN EFC OF XX00Z. AS WE BEGAN TO CLB TO 13000 AND AT 12600 WAS INTERRUPTED AND TOLD TO DSND BACK TO 11000, OUR ASSIGNED ALT. I PERSONALLY READ BACK THE CLB CLRNC. I THINK THE CTLR GAVE US, AXAB, THE CLRNC FOR COMPANY AGD. SUPPLEMENTAL INFO FROM ACN 193554: RADAR FAILURE AT ORD. WE WERE ASSIGNED HOLDING AT AN INTXN WITH 3 OTHER JETS. WE WERE ORIGINALLY ASSIGNED 11000 FT AND THEN WE THOUGHT WE WERE ASSIGNED 13000 FT. IT MADE SENSE BECAUSE ON TCASII WE COULD SEE ANOTHER ACFT AT 11000 FT AT THE OTHER END OF THE HOLDING FIX. THE CAPT REPEATED THE ALT ASSIGNMENT. WE NEVER GOT CLOSER THAN 10 MI BEFORE THE ACFT WERE ESTABLISHED AT 11 AND 13.
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.