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Flight crew of medium large transport was cleared das X at 10,000'. Next controller cleared the flight to FL280 keep speed up. Flight crew continued descent per first clearance.
| Attributes | |
| ACN | 127064 |
| Time | |
| Date | 198910 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : das |
| State Reference | TX |
| Altitude | msl bound lower : 22000 msl bound upper : 28000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zhu |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | descent other |
| Route In Use | arrival star : star |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : atp pilot : instrument |
| Experience | flight time last 90 days : 60 flight time total : 14000 flight time type : 60 |
| ASRS Report | 127064 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : flight engineer pilot : cfi pilot : atp pilot : commercial |
| Experience | flight time last 90 days : 120 flight time total : 3600 flight time type : 300 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : published procedure non adherence : clearance |
| 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:
En route to iah at FL280, cleared for daisetta arrival. Next controller cleared us direct daisetta, daisetta 9 arrival and cross at 10,000 at 250 KTS. Next controller cleared us to 240 and keep speed up above 310 KTS for traffic. Since already cleared the daisetta arrival, I interpreted this clearance as if he wanted us out of 280 and overlooking the fact we had been cleared the das arrival and requested to keep speed up for traffic. Also at 60 mi out, that is a good descent point to cross das by 10,000/250 KTS, which further led me to believe he overlooked our previous clearance. At approximately 22,000 controller asked us to level off at 220 and that we were only cleared to 240. Told him we had been cleared das arrival and to cross at 10,000/200. He said we had misunderstood clearance from previous controller. However, it was 2 previous controllers that issued the clearance.
Original NASA ASRS Text
Title: FLT CREW OF MLG WAS CLEARED DAS X AT 10,000'. NEXT CTLR CLEARED THE FLT TO FL280 KEEP SPEED UP. FLT CREW CONTINUED DESCENT PER FIRST CLRNC.
Narrative: ENRTE TO IAH AT FL280, CLRED FOR DAISETTA ARR. NEXT CTLR CLRED US DIRECT DAISETTA, DAISETTA 9 ARR AND CROSS AT 10,000 AT 250 KTS. NEXT CTLR CLRED US TO 240 AND KEEP SPEED UP ABOVE 310 KTS FOR TFC. SINCE ALREADY CLRED THE DAISETTA ARR, I INTERPRETED THIS CLRNC AS IF HE WANTED US OUT OF 280 AND OVERLOOKING THE FACT WE HAD BEEN CLRED THE DAS ARR AND REQUESTED TO KEEP SPEED UP FOR TFC. ALSO AT 60 MI OUT, THAT IS A GOOD DSCNT POINT TO CROSS DAS BY 10,000/250 KTS, WHICH FURTHER LED ME TO BELIEVE HE OVERLOOKED OUR PREVIOUS CLRNC. AT APPROX 22,000 CTLR ASKED US TO LEVEL OFF AT 220 AND THAT WE WERE ONLY CLRED TO 240. TOLD HIM WE HAD BEEN CLRED DAS ARR AND TO CROSS AT 10,000/200. HE SAID WE HAD MISUNDERSTOOD CLRNC FROM PREVIOUS CTLR. HOWEVER, IT WAS 2 PREVIOUS CTLRS THAT ISSUED THE CLRNC.
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.