B777-200B crew had an EICAS message 'gear disagreement.' the crew returned to their departure airpor...

Attributes
ACN	638330
Time
Date	200411
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 1000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : zzz.tracon
Operator	common carrier : air carrier
Make Model Name	B777-200
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 25 flight time total : 4000 flight time type : 500
ASRS Report	638330
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 80 flight time total : 26000 flight time type : 800
ASRS Report	638328
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	aircraft equipment other aircraft equipment : eicas gear disagree other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance flight crew : landed as precaution flight crew : diverted to another airport other
Consequence	other other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Following a normal takeoff, I called for gear up. We accelerated and just after calling for flaps from 5 degrees to 1 degree, the captain said, 'ok, we have a problem.' I looked at the center display and saw the EICAS 'gear disagreement' message. I continued to fly the airplane as he monitored the problem. After about 30 seconds, the noise went away and I looked and the display showed 'gear up.' the captain told me to fly the airplane and take the radio, and to ask for local vectors while he talked to the maintenance controller. I leveled off at 10000 ft on a north vector, and kept the speed at 260 KTS after cleaning up the flaps and accomplishing the after takeoff check. After discussion with the maintenance controller, slowed to 250 KTS and the captain put the gear down normally. After a short time, we raised the gear handle again and the gear was slow coming up, though no EICAS appeared. The captain made the decision to return to ZZZ, so we asked for vectors to final and made a normal approach and landing.

Original NASA ASRS Text

Title: B777-200B CREW HAD AN EICAS MESSAGE 'GEAR DISAGREEMENT.' THE CREW RETURNED TO THEIR DEP ARPT.

Narrative: FOLLOWING A NORMAL TKOF, I CALLED FOR GEAR UP. WE ACCELERATED AND JUST AFTER CALLING FOR FLAPS FROM 5 DEGS TO 1 DEG, THE CAPT SAID, 'OK, WE HAVE A PROB.' I LOOKED AT THE CTR DISPLAY AND SAW THE EICAS 'GEAR DISAGREEMENT' MESSAGE. I CONTINUED TO FLY THE AIRPLANE AS HE MONITORED THE PROB. AFTER ABOUT 30 SECONDS, THE NOISE WENT AWAY AND I LOOKED AND THE DISPLAY SHOWED 'GEAR UP.' THE CAPT TOLD ME TO FLY THE AIRPLANE AND TAKE THE RADIO, AND TO ASK FOR LCL VECTORS WHILE HE TALKED TO THE MAINT CTLR. I LEVELED OFF AT 10000 FT ON A N VECTOR, AND KEPT THE SPD AT 260 KTS AFTER CLEANING UP THE FLAPS AND ACCOMPLISHING THE AFTER TKOF CHK. AFTER DISCUSSION WITH THE MAINT CTLR, SLOWED TO 250 KTS AND THE CAPT PUT THE GEAR DOWN NORMALLY. AFTER A SHORT TIME, WE RAISED THE GEAR HANDLE AGAIN AND THE GEAR WAS SLOW COMING UP, THOUGH NO EICAS APPEARED. THE CAPT MADE THE DECISION TO RETURN TO ZZZ, SO WE ASKED FOR VECTORS TO FINAL AND MADE A NORMAL APCH AND LNDG.

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.

B777-200B crew had an EICAS message 'gear disagreement.' the crew returned to their departure airport.