|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||0601 To 1200|
|Locale Reference||intersection : tiger|
|Altitude||msl bound lower : 11000|
msl bound upper : 17000
|Operator||common carrier : air carrier|
|Make Model Name||Regional Jet CL65, Undifferentiated or Other Model|
|Flight Phase||descent : approach|
|Route In Use||arrival star : cince 4|
|Affiliation||company : air carrier|
|Function||flight crew : first officer|
|Qualification||pilot : multi engine|
pilot : instrument
pilot : commercial
pilot : cfi
|Experience||flight time last 90 days : 12|
flight time total : 4517
flight time type : 2175
|Anomaly||altitude deviation : crossing restriction not met|
non adherence : clearance
|Consequence||faa : reviewed incident with flight crew|
|Problem Areas||ATC Human Performance|
Flight Crew Human Performance
|Primary Problem||Flight Crew Human Performance|
While inbound on the cince 4 arrival, ATC cleared us to cross 10 NM northeast of tigrr intersection at 11000 ft. We acknowledged the clearance and the captain began to descend. The rate of descent was only about 1/2 of the 4500 FPM the VNAV said was required, so I inquired about the captain's intentions. He did not want to descend any more steeply and was content to be 'a little high' on the crossing. We would have been a lot high and 10 mi past the crossing fix upon reaching the assigned altitude. After some discussion we decided to inform ATC about the situation. ATC gave us an amended clearance and made no complaints. The airplane was capable of descending in excess of 6000 FPM near mmo at flight idle and flight spoilers extended. The captain certainly did not have to use this capability if he chose not to, but in this case 'a little high' was too high. An ATC clearance requiring that descent rate doesn't seem like a good plan either. At least with some communication and adjustment it all worked out.
Original NASA ASRS Text
Title: A CL-65 CAPT DOES NOT WANT TO INCREASE THE RATE OF DSCNT TO MEET THE XING RESTR.
Narrative: WHILE INBOUND ON THE CINCE 4 ARR, ATC CLRED US TO CROSS 10 NM NE OF TIGRR INTXN AT 11000 FT. WE ACKNOWLEDGED THE CLRNC AND THE CAPT BEGAN TO DSND. THE RATE OF DSCNT WAS ONLY ABOUT 1/2 OF THE 4500 FPM THE VNAV SAID WAS REQUIRED, SO I INQUIRED ABOUT THE CAPT'S INTENTIONS. HE DID NOT WANT TO DSND ANY MORE STEEPLY AND WAS CONTENT TO BE 'A LITTLE HIGH' ON THE XING. WE WOULD HAVE BEEN A LOT HIGH AND 10 MI PAST THE XING FIX UPON REACHING THE ASSIGNED ALT. AFTER SOME DISCUSSION WE DECIDED TO INFORM ATC ABOUT THE SIT. ATC GAVE US AN AMENDED CLRNC AND MADE NO COMPLAINTS. THE AIRPLANE WAS CAPABLE OF DSNDING IN EXCESS OF 6000 FPM NEAR MMO AT FLT IDLE AND FLT SPOILERS EXTENDED. THE CAPT CERTAINLY DID NOT HAVE TO USE THIS CAPABILITY IF HE CHOSE NOT TO, BUT IN THIS CASE 'A LITTLE HIGH' WAS TOO HIGH. AN ATC CLRNC REQUIRING THAT DSCNT RATE DOESN'T SEEM LIKE A GOOD PLAN EITHER. AT LEAST WITH SOME COM AND ADJUSTMENT IT ALL WORKED OUT.
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.