B777-200 flight crew reports hydraulic C quantity low while in cruise at FL360 and the pumps are sec...

Attributes
ACN	749231
Time
Date	200708
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : zzz.artcc
State Reference	US
Altitude	msl single value : 34000
Aircraft 1
Controlling Facilities	artcc : zzz.artcc
Operator	common carrier : air carrier
Make Model Name	B777-200
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Route In Use	enroute : pacific
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : relief pilot
Experience	flight time last 90 days : 240 flight time total : 9500 flight time type : 60
ASRS Report	749231
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 65 flight time total : 5500 flight time type : 100
ASRS Report	749232
Events
Anomaly	aircraft equipment problem : critical other anomaly
Independent Detector	aircraft equipment other aircraft equipment : eicas other flight crewa
Resolutory Action	flight crew : overcame equipment problem other
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

When I returned from my break the captain informed us that there had been a hydraulic problem with the center system. He gave us a thorough briefing explaining what had happened and the actions he had taken. He explained what he wanted us to do and under what circumstances he wanted to be notified. While the captain was on break we reviewed the hydraulic system in the flight manual. We also reviewed checklists involved with this failure. The captain returned from break and we decided to plan on using the center hydraulic system to get the gear and flaps down as we approached ZZZ. ATC was advised that we would like a long final approach segment in case gear and flaps didn't work normally. The captain briefed a flaps 20 degree landing in case the center system didn't operate normally. On the downwind and base leg the flaps and gear were extended normally. After a normal landing the tower reported smoke coming from our left main landing gear and we stopped and waited for rescue equipment to arrive and assess. A mechanic and tug were also waiting as we landed. After assessing the plane the mechanic decided to tow us to the gate. Supplemental information from acn 749232: at cruise; the captain and I received an EICAS message; hydraulic C quantity low. We reviewed the hydraulic page and noticed the center quantity was .40. We ran the EICAS and reviewed the flight manual; then contacted maintenance and dispatch. After consultation with maintenance the captain and I decided to turn off all hydraulic pumps to conserve any remaining hydraulic fluid. The remainder of the flight was uneventful. During descent into ZZZ we turned on all hydraulic pumps and lowered the landing gear and flaps with no problems. The captain made an uneventful landing. We taxied off runway and stopped the aircraft. Tower and ground noticed smoke emanating from our left gear and dispatched the emergency equipment. No fire was noticed and after engine shutdown we were towed to the gate. All checklists and procedures were ran uneventfully.

Original NASA ASRS Text

Title: B777-200 FLT CREW REPORTS HYD C QUANTITY LOW WHILE IN CRUISE AT FL360 AND THE PUMPS ARE SECURED UNTIL REQUIRED FOR LANDING. AFTER LANDING SMOKE IS REPORTED EMANATING FROM THE LEFT MAIN GEAR AND ACFT IS TOWED TO GATE.

Narrative: WHEN I RETURNED FROM MY BREAK THE CAPT INFORMED US THAT THERE HAD BEEN A HYD PROB WITH THE CTR SYS. HE GAVE US A THOROUGH BRIEFING EXPLAINING WHAT HAD HAPPENED AND THE ACTIONS HE HAD TAKEN. HE EXPLAINED WHAT HE WANTED US TO DO AND UNDER WHAT CIRCUMSTANCES HE WANTED TO BE NOTIFIED. WHILE THE CAPT WAS ON BREAK WE REVIEWED THE HYD SYS IN THE FLT MANUAL. WE ALSO REVIEWED CHKLISTS INVOLVED WITH THIS FAILURE. THE CAPT RETURNED FROM BREAK AND WE DECIDED TO PLAN ON USING THE CTR HYD SYS TO GET THE GEAR AND FLAPS DOWN AS WE APCHED ZZZ. ATC WAS ADVISED THAT WE WOULD LIKE A LONG FINAL APCH SEGMENT IN CASE GEAR AND FLAPS DIDN'T WORK NORMALLY. THE CAPT BRIEFED A FLAPS 20 DEG LNDG IN CASE THE CTR SYS DIDN'T OPERATE NORMALLY. ON THE DOWNWIND AND BASE LEG THE FLAPS AND GEAR WERE EXTENDED NORMALLY. AFTER A NORMAL LNDG THE TWR RPTED SMOKE COMING FROM OUR L MAIN LNDG GEAR AND WE STOPPED AND WAITED FOR RESCUE EQUIP TO ARRIVE AND ASSESS. A MECH AND TUG WERE ALSO WAITING AS WE LANDED. AFTER ASSESSING THE PLANE THE MECH DECIDED TO TOW US TO THE GATE. SUPPLEMENTAL INFO FROM ACN 749232: AT CRUISE; THE CAPT AND I RECEIVED AN EICAS MESSAGE; HYD C QUANTITY LOW. WE REVIEWED THE HYD PAGE AND NOTICED THE CTR QUANTITY WAS .40. WE RAN THE EICAS AND REVIEWED THE FLT MANUAL; THEN CONTACTED MAINT AND DISPATCH. AFTER CONSULTATION WITH MAINT THE CAPT AND I DECIDED TO TURN OFF ALL HYD PUMPS TO CONSERVE ANY REMAINING HYD FLUID. THE REMAINDER OF THE FLT WAS UNEVENTFUL. DURING DSCNT INTO ZZZ WE TURNED ON ALL HYD PUMPS AND LOWERED THE LNDG GEAR AND FLAPS WITH NO PROBS. THE CAPT MADE AN UNEVENTFUL LNDG. WE TAXIED OFF RWY AND STOPPED THE ACFT. TWR AND GND NOTICED SMOKE EMANATING FROM OUR L GEAR AND DISPATCHED THE EMER EQUIP. NO FIRE WAS NOTICED AND AFTER ENG SHUTDOWN WE WERE TOWED TO THE GATE. ALL CHKLISTS AND PROCS WERE RAN UNEVENTFULLY.

Data retrieved from NASA's ASRS site as of January 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.

B777-200 flight crew reports hydraulic C quantity low while in cruise at FL360 and the pumps are secured until required for landing. After landing smoke is reported emanating from the left main gear and aircraft is towed to gate.