37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Attributes | |
ACN | 370260 |
Time | |
Date | 199706 |
Day | Tue |
Local Time Of Day | 0601 To 1200 |
Place | |
Locale Reference | airport : iah |
State Reference | TX |
Altitude | msl bound lower : 10000 msl bound upper : 10000 |
Environment | |
Flight Conditions | VMC |
Light | Daylight |
Aircraft 1 | |
Controlling Facilities | tracon : iah tower : sfo |
Operator | general aviation : corporate |
Make Model Name | Beechjet 400 |
Operating Under FAR Part | Part 91 |
Navigation In Use | Other Other |
Flight Phase | descent other |
Route In Use | arrival other arrival star : star enroute airway : iah |
Flight Plan | IFR |
Person 1 | |
Affiliation | Other |
Function | flight crew : captain oversight : pic |
Qualification | pilot : atp |
Experience | flight time last 90 days : 30 flight time total : 6700 flight time type : 250 |
ASRS Report | 370260 |
Person 2 | |
Affiliation | Other |
Function | flight crew : first officer |
Qualification | pilot : commercial pilot : instrument |
Experience | flight time last 90 days : 100 flight time total : 1250 flight time type : 450 |
ASRS Report | 370547 |
Events | |
Anomaly | other anomaly 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 | Inter Facility Coordination Failure |
Narrative:
On our initial descent out of FL430, the controller asked us to maintain our best forward speed for spacing. We were told to advise next controller of our ATC airspeed assignment. That controller also confirmed best forward airspeed. We were then passed on to 1 or 2 other controllers during our descent into hou on the rokit 1 arrival. We were given 'cross sslam at 10000 ft.' as we passed over duunk we were still maintaining best forward airspeed since that was the last ATC assigned airspeed request. At some point hou approach cleared us down to 7000 ft. I was in the process of slowing the aircraft from 300 KTS to 250 KTS before starting down to 7000 ft. The controller then asked what our airspeed was. We informed him we were slowing from 300 KTS to 250 KTS before descending. He quickly advised us that the arrival showed a published 250 KTS over duunk. We told him we had previously been assigned 'best forward airspeed' and had not been told to 'resume normal speed' or given a crossing airspeed restr. The controller then mentioned something that the previous controller had failed to give us normal speed but insisted the arrival called for 250 KTS regardless. We never questioned the controllers about our airspeed during our descent on the arrival and none of them ever assigned us anything other than 'best forward speed.' to avoid a similar situation in the future, I will try to verify with each subsequent controller if we are to continue with 'previously assigned.'
Original NASA ASRS Text
Title: BEECHJET ACFT ON STAR WAS INSTRUCTED TO KEEP SPD UP BY CTLRS AND CROSS INTXN AT 10000 FT. APCH CTLR CLRED FLC TO DSND, BUT THE SPD WAS STILL 300 KTS SO RPTR CAPT SLOWED PRIOR TO DSCNT. APCH CTLR TOLD FLC THAT THEY SHOULD HAVE SLOWED IN ACCORDANCE WITH THE STAR RESTR.
Narrative: ON OUR INITIAL DSCNT OUT OF FL430, THE CTLR ASKED US TO MAINTAIN OUR BEST FORWARD SPD FOR SPACING. WE WERE TOLD TO ADVISE NEXT CTLR OF OUR ATC AIRSPD ASSIGNMENT. THAT CTLR ALSO CONFIRMED BEST FORWARD AIRSPD. WE WERE THEN PASSED ON TO 1 OR 2 OTHER CTLRS DURING OUR DSCNT INTO HOU ON THE ROKIT 1 ARR. WE WERE GIVEN 'CROSS SSLAM AT 10000 FT.' AS WE PASSED OVER DUUNK WE WERE STILL MAINTAINING BEST FORWARD AIRSPD SINCE THAT WAS THE LAST ATC ASSIGNED AIRSPD REQUEST. AT SOME POINT HOU APCH CLRED US DOWN TO 7000 FT. I WAS IN THE PROCESS OF SLOWING THE ACFT FROM 300 KTS TO 250 KTS BEFORE STARTING DOWN TO 7000 FT. THE CTLR THEN ASKED WHAT OUR AIRSPD WAS. WE INFORMED HIM WE WERE SLOWING FROM 300 KTS TO 250 KTS BEFORE DSNDING. HE QUICKLY ADVISED US THAT THE ARR SHOWED A PUBLISHED 250 KTS OVER DUUNK. WE TOLD HIM WE HAD PREVIOUSLY BEEN ASSIGNED 'BEST FORWARD AIRSPD' AND HAD NOT BEEN TOLD TO 'RESUME NORMAL SPD' OR GIVEN A XING AIRSPD RESTR. THE CTLR THEN MENTIONED SOMETHING THAT THE PREVIOUS CTLR HAD FAILED TO GIVE US NORMAL SPD BUT INSISTED THE ARR CALLED FOR 250 KTS REGARDLESS. WE NEVER QUESTIONED THE CTLRS ABOUT OUR AIRSPD DURING OUR DSCNT ON THE ARR AND NONE OF THEM EVER ASSIGNED US ANYTHING OTHER THAN 'BEST FORWARD SPD.' TO AVOID A SIMILAR SIT IN THE FUTURE, I WILL TRY TO VERIFY WITH EACH SUBSEQUENT CTLR IF WE ARE TO CONTINUE WITH 'PREVIOUSLY ASSIGNED.'
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.