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A B737-400 first officer questions the ATC procedure regarding an amended clearance altitude change when a previous altitude crossing restr was supposedly in effect.
| Attributes | |
| ACN | 425860 |
| Time | |
| Date | 199901 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : das |
| State Reference | TX |
| Altitude | msl bound lower : 10000 msl bound upper : 11500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-400 |
| Flight Phase | descent other |
| Route In Use | arrival other enroute : direct enroute airway : iah |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : cfi pilot : commercial |
| Experience | flight time last 90 days : 190 flight time total : 15300 flight time type : 7000 |
| ASRS Report | 425860 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | altitude deviation : undershoot altitude deviation : crossing restriction not met non adherence : published procedure other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
Center gave us clearance to cross das at 10000 ft, then switched us to iah approach. At time of changeover, we were on path to cross das at 10000 ft. Approach gave us a new clearance to 'slow to 210 KTS now,' then 'descend to 7000 ft.' captain slowed aircraft to 210 KTS and crossed das at 11500 ft. Approach should have said to meet crossing restr or said at das slow to 210 KTS and then descend to 7000 ft, because when he (the captain) got the new clearance, he forgot about das at 10000 ft.
Original NASA ASRS Text
Title: A B737-400 FO QUESTIONS THE ATC PROC REGARDING AN AMENDED CLRNC ALT CHANGE WHEN A PREVIOUS ALT XING RESTR WAS SUPPOSEDLY IN EFFECT.
Narrative: CTR GAVE US CLRNC TO CROSS DAS AT 10000 FT, THEN SWITCHED US TO IAH APCH. AT TIME OF CHANGEOVER, WE WERE ON PATH TO CROSS DAS AT 10000 FT. APCH GAVE US A NEW CLRNC TO 'SLOW TO 210 KTS NOW,' THEN 'DSND TO 7000 FT.' CAPT SLOWED ACFT TO 210 KTS AND CROSSED DAS AT 11500 FT. APCH SHOULD HAVE SAID TO MEET XING RESTR OR SAID AT DAS SLOW TO 210 KTS AND THEN DSND TO 7000 FT, BECAUSE WHEN HE (THE CAPT) GOT THE NEW CLRNC, HE FORGOT ABOUT DAS AT 10000 FT.
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.