A B757-200 flight crew experienced loss of 'C hydraulic elec 1.' they consulted with maintenance and...

Attributes
ACN	801141
Time
Date	200808
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : zzz.artcc
State Reference	US
Altitude	msl single value : 24000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zzz.artcc
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	801141
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	aircraft equipment other aircraft equipment : eicas other flight crewa
Resolutory Action	flight crew : landed as precaution other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

'C hydraulic elec 1' message illuminated. Followed QRH and called maintenance. Maintenance had me troubleshoot. After they determined it would not restart; maintenance had me pull the circuit breaker for the #1 pump. They thought it would be safe to continue ETOPS until the 'hydraulic qty' message appeared followed by 'C hydraulic system press.' at that point a leak was confirmed and maintenance immediately asked that we return to ZZZ and the dispatch concurred. Later; the 'right yaw damper' also appeared. Despite the loss of all C hydraulic; the aircraft operated fine as the left and right hydraulic carried the remaining load. The fuel was burned down to 198000 pounds to prevent an overweight landing. No emergency was declared; however; the fire department stood by as a precaution. After arriving at the gate; we spent a few mins with maintenance going over the events. They seemed to already have a good idea of what caused the leak.

Original NASA ASRS Text

Title: A B757-200 FLT CREW EXPERIENCED LOSS OF 'C HYD ELEC 1.' THEY CONSULTED WITH MAINT AND DECIDED TO RETURN TO DEP ARPT.

Narrative: 'C HYD ELEC 1' MESSAGE ILLUMINATED. FOLLOWED QRH AND CALLED MAINT. MAINT HAD ME TROUBLESHOOT. AFTER THEY DETERMINED IT WOULD NOT RESTART; MAINT HAD ME PULL THE CIRCUIT BREAKER FOR THE #1 PUMP. THEY THOUGHT IT WOULD BE SAFE TO CONTINUE ETOPS UNTIL THE 'HYD QTY' MESSAGE APPEARED FOLLOWED BY 'C HYD SYS PRESS.' AT THAT POINT A LEAK WAS CONFIRMED AND MAINT IMMEDIATELY ASKED THAT WE RETURN TO ZZZ AND THE DISPATCH CONCURRED. LATER; THE 'R YAW DAMPER' ALSO APPEARED. DESPITE THE LOSS OF ALL C HYD; THE ACFT OPERATED FINE AS THE L AND R HYD CARRIED THE REMAINING LOAD. THE FUEL WAS BURNED DOWN TO 198000 LBS TO PREVENT AN OVERWT LNDG. NO EMER WAS DECLARED; HOWEVER; THE FIRE DEPT STOOD BY AS A PRECAUTION. AFTER ARRIVING AT THE GATE; WE SPENT A FEW MINS WITH MAINT GOING OVER THE EVENTS. THEY SEEMED TO ALREADY HAVE A GOOD IDEA OF WHAT CAUSED THE LEAK.

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.

A B757-200 flight crew experienced loss of 'C hydraulic elec 1.' they consulted with maintenance and decided to return to departure airport.