Flight crew of advanced technology medium large transport fails to meet crossing restriction.

Attributes
ACN	120121
Time
Date	198908
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : srp airport : phx
State Reference	AZ
Altitude	msl bound lower : 12000 msl bound upper : 25000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zab
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	cruise other descent other
Route In Use	arrival star : star
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : flight engineer pilot : commercial pilot : cfi pilot : atp
Experience	flight time last 90 days : 150 flight time total : 9500 flight time type : 2500
ASRS Report	120121
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : crossing restriction not met altitude deviation : undershoot non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was the first officer on flight from sfo to phx. The captain was flying the aircraft. We were issued a clearance to cross the plsnt intersection at 12,000 MSL and 250 KTS. While level at FL250, the captain programmed the FMC for the path descent. As we approached the crossing restriction, approximately 60 NM out, I asked the captain if he had heard the crossing restriction. He conveyed to me that he had. When I noticed that the FMC had miscomputed the descent point, I again asked the captain when he was going to start down. When it became obvious to me that we were not going to make the restriction, ie, we were level at FL250, 9 NM from the crossing fix at .77, I asked the captain if he wanted me to advice ATC. He said yes.

Original NASA ASRS Text

Title: FLT CREW OF ADVANCED TECHNOLOGY MLG FAILS TO MEET CROSSING RESTRICTION.

Narrative: I WAS THE F/O ON FLT FROM SFO TO PHX. THE CAPT WAS FLYING THE ACFT. WE WERE ISSUED A CLRNC TO CROSS THE PLSNT INTXN AT 12,000 MSL AND 250 KTS. WHILE LEVEL AT FL250, THE CAPT PROGRAMMED THE FMC FOR THE PATH DSCNT. AS WE APCHED THE XING RESTRICTION, APPROX 60 NM OUT, I ASKED THE CAPT IF HE HAD HEARD THE XING RESTRICTION. HE CONVEYED TO ME THAT HE HAD. WHEN I NOTICED THAT THE FMC HAD MISCOMPUTED THE DSCNT POINT, I AGAIN ASKED THE CAPT WHEN HE WAS GOING TO START DOWN. WHEN IT BECAME OBVIOUS TO ME THAT WE WERE NOT GOING TO MAKE THE RESTRICTION, IE, WE WERE LEVEL AT FL250, 9 NM FROM THE XING FIX AT .77, I ASKED THE CAPT IF HE WANTED ME TO ADVICE ATC. HE SAID YES.

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.