A B747-400's nose landing gear did not retract after takeoff. The crew returned to land after dumpin...

Attributes
ACN	815685
Time
Date	200812
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 3000
Aircraft 1
Controlling Facilities	tracon : zzz.tracon tower : zzz.tower
Operator	common carrier : air carrier
Make Model Name	B747-400
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial
Route In Use	departure sid : n/s
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : relief pilot
Experience	flight time last 90 days : 220 flight time total : 16500 flight time type : 3200
ASRS Report	815685
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	aircraft equipment other aircraft equipment : eicas
Resolutory Action	flight crew : diverted to another airport
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

First officer's takeoff from ZZZ. After takeoff; the capt raised the gear handle normally; but we received an EICAS message 'gear disagreement' followed by gear abnormal gear display -- indicating main gear was normal but nose gear was not in the normal position. Relief officer got the irregular checklist and proceeded to run the procedure stated for the problem. After this did not correct the problem; relief pilot contacted dispatch and maintenance control. The captain and maintenance control and crew decided the problem could not be corrected inflight and we returned to ZZZ with the gear down; locked and indicating normal. We did have to jettison fuel and hold before we returned for a normal landing.

Original NASA ASRS Text

Title: A B747-400's nose landing gear did not retract after takeoff. The crew returned to land after dumping fuel in holding.

Narrative: First Officer's takeoff from ZZZ. After takeoff; the Capt raised the gear handle normally; but we received an EICAS message 'Gear Disagreement' followed by gear abnormal gear display -- indicating main gear was normal but nose gear was not in the normal position. Relief Officer got the Irregular Checklist and proceeded to run the procedure stated for the problem. After this did not correct the problem; Relief Pilot contacted Dispatch and Maintenance Control. The Captain and Maintenance Control and Crew decided the problem could not be corrected inflight and we returned to ZZZ with the gear down; locked and indicating normal. We did have to jettison fuel and hold before we returned for a normal landing.

Data retrieved from NASA's ASRS site as of May 2009 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.