Flight crew failed to make crossing restr during descent by undershooting the altitude.

Attributes
ACN	323150
Time
Date	199512
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : stw airport : jfk
State Reference	NY
Altitude	msl single value : 23700
Aircraft 1
Controlling Facilities	artcc : zny
Operator	common carrier : air carrier
Make Model Name	B767 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent other
Route In Use	arrival other arrival star : star
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	323150
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : undershoot altitude deviation : crossing restriction not met non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Altitude crossing restr. This was the second trip with copilot who has approximately 140 hours in this type of aircraft and has a good knowledge of the FMS. While out of the cockpit to go to the lav, ATC cleared us from FL410 to FL330. Copilot started descent on FMS and informed me of the clearance on my return. During descent ATC cleared us to cross harty intersection on the lendy 4 arrival at FL230. The copilot made and input to the FMS. I started to xchk the FMS and realized the FMS/autoplt was not going to make the crossing restr. I advised the copilot of this and he took over manual control of the autoplt and all indications were good that we would make the crossing restr. When the autoplt went into altitude capture it really flattened out the rate of descent. We had to force the aircraft to FL230 and crossed harty about 700 ft high. ATC did not indicate any conflict due to our crossing harty high. We discussed possible FMS programming problems and the need to monitor the FMS/autoplt and to manually control the aircraft and autothrottles if the aircraft is not performing as desired.

Original NASA ASRS Text

Title: FLC FAILED TO MAKE XING RESTR DURING DSCNT BY UNDERSHOOTING THE ALT.

Narrative: ALT XING RESTR. THIS WAS THE SECOND TRIP WITH COPLT WHO HAS APPROX 140 HRS IN THIS TYPE OF ACFT AND HAS A GOOD KNOWLEDGE OF THE FMS. WHILE OUT OF THE COCKPIT TO GO TO THE LAV, ATC CLRED US FROM FL410 TO FL330. COPLT STARTED DSCNT ON FMS AND INFORMED ME OF THE CLRNC ON MY RETURN. DURING DSCNT ATC CLRED US TO CROSS HARTY INTXN ON THE LENDY 4 ARR AT FL230. THE COPLT MADE AND INPUT TO THE FMS. I STARTED TO XCHK THE FMS AND REALIZED THE FMS/AUTOPLT WAS NOT GOING TO MAKE THE XING RESTR. I ADVISED THE COPLT OF THIS AND HE TOOK OVER MANUAL CTL OF THE AUTOPLT AND ALL INDICATIONS WERE GOOD THAT WE WOULD MAKE THE XING RESTR. WHEN THE AUTOPLT WENT INTO ALT CAPTURE IT REALLY FLATTENED OUT THE RATE OF DSCNT. WE HAD TO FORCE THE ACFT TO FL230 AND CROSSED HARTY ABOUT 700 FT HIGH. ATC DID NOT INDICATE ANY CONFLICT DUE TO OUR XING HARTY HIGH. WE DISCUSSED POSSIBLE FMS PROGRAMMING PROBS AND THE NEED TO MONITOR THE FMS/AUTOPLT AND TO MANUALLY CTL THE ACFT AND AUTOTHROTTLES IF THE ACFT IS NOT PERFORMING AS DESIRED.

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.