Air carrier widebody transport altitude deviation undershot altitude crossing restriction.

Attributes
ACN	125527
Time
Date	198910
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sfo
State Reference	CA
Altitude	msl bound lower : 11000 msl bound upper : 12500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zoa
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	descent other
Route In Use	arrival star : star
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 150 flight time total : 4500
ASRS Report	125527
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot altitude deviation : crossing restriction not met non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

At FL240 we were cleared to cross 20 northwest sfo at 250 KTS and 11,000'. We crossed the 20 mi fix at 250 KTS but at about 12,500'. We were level at 11,000 at 16 mi northwest sfo. New captain, less than 100 hours in type. We were set up originally for another arrival from the northwest instead of the southeast. This was with fairly short notice. With this change in routing and subsequent descent clearance, the captain being somewhat preoccupied with programming the FMS, 'got behind'. I was monitoring the sfo DME and giving him this information that we were close in and needed to 'get down'. He got the FMS programmed and executed the clearance, just a little late.

Original NASA ASRS Text

Title: ACR WDB ALT DEVIATION UNDERSHOT ALT CROSSING RESTRICTION.

Narrative: AT FL240 WE WERE CLRED TO CROSS 20 NW SFO AT 250 KTS AND 11,000'. WE CROSSED THE 20 MI FIX AT 250 KTS BUT AT ABOUT 12,500'. WE WERE LEVEL AT 11,000 AT 16 MI NW SFO. NEW CAPT, LESS THAN 100 HRS IN TYPE. WE WERE SET UP ORIGINALLY FOR ANOTHER ARRIVAL FROM THE NW INSTEAD OF THE SE. THIS WAS WITH FAIRLY SHORT NOTICE. WITH THIS CHANGE IN ROUTING AND SUBSEQUENT DSCNT CLRNC, THE CAPT BEING SOMEWHAT PREOCCUPIED WITH PROGRAMMING THE FMS, 'GOT BEHIND'. I WAS MONITORING THE SFO DME AND GIVING HIM THIS INFORMATION THAT WE WERE CLOSE IN AND NEEDED TO 'GET DOWN'. HE GOT THE FMS PROGRAMMED AND EXECUTED THE CLRNC, JUST A LITTLE LATE.

Data retrieved from NASA's ASRS site as of August 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.