B767-200 flight crew return land in overweight condition due to landing retraction and hydraulic system malfunction after takeoff due possibly to running over a foreign object during takeoff roll. Tower fly-by was made to confirm landing gear position.

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Attributes
ACN	507575
Time
Date	200104
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : pit.airport
State Reference	PA
Altitude	agl bound lower : 0 agl bound upper : 1500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : pit.tower
Operator	common carrier : air carrier
Make Model Name	B767-200
Operating Under FAR Part	Part 121
Flight Phase	climbout : takeoff climbout : initial
Route In Use	departure sid : ns
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : flight engineer pilot : instrument pilot : multi engine pilot : atp pilot : cfi
Experience	flight time last 90 days : 150 flight time total : 21500 flight time type : 900
ASRS Report	507575
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : lndg retract and hyd main indicators other flight crewa other flight crewb
Resolutory Action	flight crew : diverted to another airport flight crew : landed in emergency condition
Consequence	other other other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

On rotation/liftoff from runway 28R at pit (with the captain flying), the aircraft bumped up from the left side. Perhaps the left main gear ran over something on the runway or maybe a blown tire. We did not know at that point. An EICAS warning sounded and also center hydraulic system warning lights illuminated as the landing gear was retracting. The gear did not fully retract. The captain called 'gear down.' I did so, and the warning ceased. The captain instructed me to ask the tower for a delaying vector while we worked the situation. A company B767/B757 qualified first officer was riding in the cabin and she was summoned to the flight deck to assist. Control of the aircraft was xferred to me as the captain conferred with maintenance. We made a fly-by by the tower at 600 ft AGL for gear observation. All hydraulic system looked normal now. The captain elected to land, took control of the aircraft while I ran the QRH procedure for an overweight landing. We landed and, while taxiing in, observed on the EICAS 'C hydraulic system maintenance' idg out temperature.'

Original NASA ASRS Text

Title: B767-200 FLC RETURN LAND IN OVERWT CONDITION DUE TO LNDG RETRACTION AND HYD SYS MALFUNCTION AFTER TKOF DUE POSSIBLY TO RUNNING OVER A FOREIGN OBJECT DURING TKOF ROLL. TWR FLY-BY WAS MADE TO CONFIRM LNDG GEAR POS.

Narrative: ON ROTATION/LIFTOFF FROM RWY 28R AT PIT (WITH THE CAPT FLYING), THE ACFT BUMPED UP FROM THE L SIDE. PERHAPS THE L MAIN GEAR RAN OVER SOMETHING ON THE RWY OR MAYBE A BLOWN TIRE. WE DID NOT KNOW AT THAT POINT. AN EICAS WARNING SOUNDED AND ALSO CTR HYD SYS WARNING LIGHTS ILLUMINATED AS THE LNDG GEAR WAS RETRACTING. THE GEAR DID NOT FULLY RETRACT. THE CAPT CALLED 'GEAR DOWN.' I DID SO, AND THE WARNING CEASED. THE CAPT INSTRUCTED ME TO ASK THE TWR FOR A DELAYING VECTOR WHILE WE WORKED THE SIT. A COMPANY B767/B757 QUALIFIED FO WAS RIDING IN THE CABIN AND SHE WAS SUMMONED TO THE FLT DECK TO ASSIST. CTL OF THE ACFT WAS XFERRED TO ME AS THE CAPT CONFERRED WITH MAINT. WE MADE A FLY-BY BY THE TWR AT 600 FT AGL FOR GEAR OBSERVATION. ALL HYD SYS LOOKED NORMAL NOW. THE CAPT ELECTED TO LAND, TOOK CTL OF THE ACFT WHILE I RAN THE QRH PROC FOR AN OVERWT LNDG. WE LANDED AND, WHILE TAXIING IN, OBSERVED ON THE EICAS 'C HYD SYS MAINT' IDG OUT TEMP.'

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.