Altitude deviation altitude undershot in descent, altitude crossing restr not met.

Attributes
ACN	303740
Time
Date	199505
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : bpr airport : dfw
State Reference	TX
Altitude	msl bound lower : 11000 msl bound upper : 11500
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : dfw
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	descent other
Route In Use	arrival other arrival star : star enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	303740
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	altitude deviation : undershoot altitude deviation : crossing restriction not met inflight encounter other non adherence : clearance non adherence : published procedure
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

In sum: while in the boids 4 arrival to dfw at PM43Z, flight crossed didly intersection/bridgeport 108 degree radial and 15 mi DME at 11500 ft vice assigned 11000 ft. Flight had been speed restr to 250 KTS from ardmor/adm/VOR. Heading 150 degrees had been assigned to cut the corner and intercept the boids 4 arrival east of bpr VOR. Winds at altitude were 280 degrees at 80 KTS. When flight made heading change from the assigned 150 degrees to intercept the bpr 108 degree radial ground speed increased approximately 50 KTS due to the increased tailwind component. Combined speed restr and increased ground speed caused the crossing at didly to be at 11500 ft vice assigned 11000 ft.

Original NASA ASRS Text

Title: ALTDEV ALT UNDERSHOT IN DSCNT, ALT XING RESTR NOT MET.

Narrative: IN SUM: WHILE IN THE BOIDS 4 ARR TO DFW AT PM43Z, FLT CROSSED DIDLY INTXN/BRIDGEPORT 108 DEG RADIAL AND 15 MI DME AT 11500 FT VICE ASSIGNED 11000 FT. FLT HAD BEEN SPD RESTR TO 250 KTS FROM ARDMOR/ADM/VOR. HDG 150 DEGS HAD BEEN ASSIGNED TO CUT THE CORNER AND INTERCEPT THE BOIDS 4 ARR E OF BPR VOR. WINDS AT ALT WERE 280 DEGS AT 80 KTS. WHEN FLT MADE HDG CHANGE FROM THE ASSIGNED 150 DEGS TO INTERCEPT THE BPR 108 DEG RADIAL GND SPD INCREASED APPROX 50 KTS DUE TO THE INCREASED TAILWIND COMPONENT. COMBINED SPD RESTR AND INCREASED GND SPD CAUSED THE XING AT DIDLY TO BE AT 11500 FT VICE ASSIGNED 11000 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.