B757 crew had FMC drop all departure information.

Attributes
ACN	450650
Time
Date	199910
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : jfk.airport
State Reference	NY
Altitude	msl bound lower : 11000 msl bound upper : 11600
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90.tracon
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : intermediate altitude
Route In Use	departure sid : kennedy 7
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 304 flight time total : 9000
ASRS Report	450650
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : multi engine pilot : commercial
Events
Anomaly	aircraft equipment problem : critical altitude deviation : overshoot non adherence : clearance
Independent Detector	aircraft equipment : altitude alert
Resolutory Action	flight crew : returned to assigned altitude
Consequence	other
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

On takeoff, we discovered that the FMC had failed to initialize properly (although the captain had checked in preflight once and I had checked it twice). Hence, we were unable to use it for navigation. While I flew the airplane on raw data, the captain attempted to sort out the FMC. At 11600 ft MSL, the altitude alerter went off. We had been cleared to climb to 11000 ft. As we returned to our assigned altitude, departure control confirmed our assigned altitude. Obviously, neither of us were watching the altitude. Next time I am confronted with a problem, I will try to use the autoplt to reduce my workload and increase my situational awareness.

Original NASA ASRS Text

Title: B757 CREW HAD FMC DROP ALL DEP INFO.

Narrative: ON TKOF, WE DISCOVERED THAT THE FMC HAD FAILED TO INITIALIZE PROPERLY (ALTHOUGH THE CAPT HAD CHKED IN PREFLT ONCE AND I HAD CHKED IT TWICE). HENCE, WE WERE UNABLE TO USE IT FOR NAV. WHILE I FLEW THE AIRPLANE ON RAW DATA, THE CAPT ATTEMPTED TO SORT OUT THE FMC. AT 11600 FT MSL, THE ALT ALERTER WENT OFF. WE HAD BEEN CLRED TO CLB TO 11000 FT. AS WE RETURNED TO OUR ASSIGNED ALT, DEP CTL CONFIRMED OUR ASSIGNED ALT. OBVIOUSLY, NEITHER OF US WERE WATCHING THE ALT. NEXT TIME I AM CONFRONTED WITH A PROB, I WILL TRY TO USE THE AUTOPLT TO REDUCE MY WORKLOAD AND INCREASE MY SITUATIONAL AWARENESS.

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.