<< >> NASA ASRS Report 354706, December 1996

DC8-73 does not make altitude crossing restr at deale intersection because ATC gave descent clearance late.

Attributes
ACN	354706
Time
Date	199612
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : ott airport : bwi
State Reference	MD
Altitude	msl bound lower : 6000 msl bound upper : 10500
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : dca
Operator	common carrier : air carrier
Make Model Name	DC-8 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other
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 : flight engineer pilot : atp
Experience	flight time last 90 days : 40 flight time total : 4800 flight time type : 440
ASRS Report	354706
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : flight engineer pilot : commercial pilot : atp
Experience	flight time last 90 days : 150 flight time total : 6500 flight time type : 4000
ASRS Report	354880
Events
Anomaly	altitude deviation : crossing restriction not met non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

On descent into bwi on the ott 3 arrival, washington approach kept us higher than normal descent profile. We were 11000 ft MSL approaching ott VOR, arrival procedure calls for 9000 ft MSL crossing ott. Approximately 5 mi prior to ott we were given a descent to cross deale intersection at 6000 ft MSL. When we tried to inform ATC that we would not be able to get down to make the restr, we were unable to get an acknowledgment from ATC on the first 2 attempts. On the 3RD attempt ATC acknowledged and informed us of opposite direction traffic at 2 O'clock. We acknowledged traffic visually acquired, ATC again said to maintain 6000 ft. It was not a near miss but we deployed thrust reversers at 8500 ft MSL to accelerate descent to ensure plenty of vertical separation.

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Original NASA ASRS Text

Title: DC8-73 DOES NOT MAKE ALT XING RESTR AT DEALE INTXN BECAUSE ATC GAVE DSCNT CLRNC LATE.

Narrative: ON DSCNT INTO BWI ON THE OTT 3 ARR, WASHINGTON APCH KEPT US HIGHER THAN NORMAL DSCNT PROFILE. WE WERE 11000 FT MSL APCHING OTT VOR, ARR PROC CALLS FOR 9000 FT MSL XING OTT. APPROX 5 MI PRIOR TO OTT WE WERE GIVEN A DSCNT TO CROSS DEALE INTXN AT 6000 FT MSL. WHEN WE TRIED TO INFORM ATC THAT WE WOULD NOT BE ABLE TO GET DOWN TO MAKE THE RESTR, WE WERE UNABLE TO GET AN ACKNOWLEDGMENT FROM ATC ON THE FIRST 2 ATTEMPTS. ON THE 3RD ATTEMPT ATC ACKNOWLEDGED AND INFORMED US OF OPPOSITE DIRECTION TFC AT 2 O'CLOCK. WE ACKNOWLEDGED TFC VISUALLY ACQUIRED, ATC AGAIN SAID TO MAINTAIN 6000 FT. IT WAS NOT A NEAR MISS BUT WE DEPLOYED THRUST REVERSERS AT 8500 FT MSL TO ACCELERATE DSCNT TO ENSURE PLENTY OF VERT SEPARATION.

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.