A B757-200's rt hydraulic qty decreased in flight. System secured until landing check list. An emerg...

Attributes
ACN	793398
Time
Date	200806
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz2.airport
State Reference	US
Altitude	msl single value : 39000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zzz2.artcc
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Route In Use	enroute : atlantic
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	793398
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	other flight crewa
Resolutory Action	flight crew : diverted to another airport flight crew : landed in emergency condition flight crew : declared emergency
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

En route to ZZZ to ZZZ1 experienced loss of right hydraulic quantity at cruise FL390/mach .80 and approximately 120 NM southwest of xxxxx intersection. Received right hydraulic quantity caution accompanied by right reservoir light on hydraulic overhead panel. Right system pressure observed as normal and quantity indicated .52 mach with RF illuminated. Stabilized system as per QRH procedure and turned off right engine and electric hydraulic pumps. Notified ATC and requested divert direct ZZZ2 which was deemed as best suitable alternate 35 mins away using normal descent procedures. Notified dispatch. Declared emergency with ATC. Coordinated with flight attendants for emergency landing preparation and briefing of passenger. Priority handling received with ATC vectors to uneventful ILS runway 9 landing. As per QRH recommendation; restored right hydraulic electric pump at 1000 ft AGL for stability and braking. Right system quantity decreased to .42 mach and normal pressure was observed throughout landing rollout. Stopped and shutdown aircraft on runway and had arff captain inspect brakes and received all clear. Stayed on runway for maintenance tow to gate.

Original NASA ASRS Text

Title: A B757-200'S RT HYDRAULIC QTY DECREASED IN FLT. SYSTEM SECURED UNTIL LNDG CHK LIST. AN EMER WAS DECLARED FOLLOWED BY A DIVERSION TO A NEARBY ARPT.

Narrative: ENRTE TO ZZZ TO ZZZ1 EXPERIENCED LOSS OF R HYD QUANTITY AT CRUISE FL390/MACH .80 AND APPROX 120 NM SW OF XXXXX INTXN. RECEIVED R HYD QUANTITY CAUTION ACCOMPANIED BY R RESERVOIR LIGHT ON HYD OVERHEAD PANEL. R SYS PRESSURE OBSERVED AS NORMAL AND QUANTITY INDICATED .52 MACH WITH RF ILLUMINATED. STABILIZED SYS AS PER QRH PROC AND TURNED OFF R ENG AND ELECTRIC HYD PUMPS. NOTIFIED ATC AND REQUESTED DIVERT DIRECT ZZZ2 WHICH WAS DEEMED AS BEST SUITABLE ALTERNATE 35 MINS AWAY USING NORMAL DSCNT PROCS. NOTIFIED DISPATCH. DECLARED EMER WITH ATC. COORDINATED WITH FLT ATTENDANTS FOR EMER LNDG PREPARATION AND BRIEFING OF PAX. PRIORITY HANDLING RECEIVED WITH ATC VECTORS TO UNEVENTFUL ILS RWY 9 LNDG. AS PER QRH RECOMMENDATION; RESTORED R HYD ELECTRIC PUMP AT 1000 FT AGL FOR STABILITY AND BRAKING. R SYS QUANTITY DECREASED TO .42 MACH AND NORMAL PRESSURE WAS OBSERVED THROUGHOUT LNDG ROLLOUT. STOPPED AND SHUTDOWN ACFT ON RWY AND HAD ARFF CAPT INSPECT BRAKES AND RECEIVED ALL CLR. STAYED ON RWY FOR MAINT TOW TO GATE.

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's rt hydraulic qty decreased in flight. System secured until landing check list. An emergency was declared followed by a diversion to a nearby airport.