MD80 descended with VNAV programmed to make a crossing altitude. Aircraft failed to make the crossin...

Attributes
ACN	404620
Time
Date	199806
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : ord
State Reference	IL
Altitude	msl bound lower : 11000 msl bound upper : 11800
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : ord tower : bmi
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 enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	404620
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : crossing restriction not met inflight encounter : weather inflight encounter other other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Directed to cross benky at 11000 ft by ord approach control. Left FL240 with 10 KT tailwind as calculated by performance monitoring system. It became apparent that maximum effort would be needed to meet restr. Extended speed brakes and increased speed to 340 KTS at idle power but still crossed benky about 800 ft high. After leveloff performance monitoring system showed tailwind had increased to 32 KTS. Need to be aware that winds will affect clearance requirements.

Original NASA ASRS Text

Title: MD80 DSNDED WITH VNAV PROGRAMMED TO MAKE A XING ALT. ACFT FAILED TO MAKE THE XING ALT.

Narrative: DIRECTED TO CROSS BENKY AT 11000 FT BY ORD APCH CTL. LEFT FL240 WITH 10 KT TAILWIND AS CALCULATED BY PERFORMANCE MONITORING SYS. IT BECAME APPARENT THAT MAX EFFORT WOULD BE NEEDED TO MEET RESTR. EXTENDED SPD BRAKES AND INCREASED SPD TO 340 KTS AT IDLE PWR BUT STILL CROSSED BENKY ABOUT 800 FT HIGH. AFTER LEVELOFF PERFORMANCE MONITORING SYS SHOWED TAILWIND HAD INCREASED TO 32 KTS. NEED TO BE AWARE THAT WINDS WILL AFFECT CLRNC REQUIREMENTS.

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.

MD80 descended with VNAV programmed to make a crossing altitude. Aircraft failed to make the crossing altitude.