An MD80 flight crew declared an emergency after losing both hydraulic system. The flight crew was ab...

Attributes
ACN	624259
Time
Date	200407
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : txo.vortac
State Reference	TX
Altitude	msl single value : 33000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zab.artcc
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	624259
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	other flight crewa
Resolutory Action	flight crew : landed in emergency condition flight crew : declared emergency
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

While cruising at FL330, 2 hours after departure, left hydraulic system lost pressure (quantity high). Referred to QRH and turned right system to high and xfer pump on. System returned to normal pressure for 15 mins. Then both left and right system showed no pressure along with low pressure lights illuminated. That was preceded by a low frequency whirr which increased in volume over a short period of time. Flight attendants called and also reported the whirring noise in the cabin. We then followed QRH procedures for total loss of hydraulics. Notified ATC and company declaring an emergency at that time. Dispatch patched aircraft to maintenance for assistance. We then were able to regain the right hydraulic system. We landed at destination (dfw) with normal right hydraulic system pressure and no left hydraulic system pressure. Flight attendants and passenger were briefed per company procedures. Uneventful landing at dfw with the aircraft being inspected by emergency personnel. Taxied to the gate and debriefed maintenance, chief pilot, and FAA representative.

Original NASA ASRS Text

Title: AN MD80 FLT CREW DECLARED AN EMER AFTER LOSING BOTH HYD SYS. THE FLT CREW WAS ABLE TO REGAIN ONE OF THE HYD SYS PRIOR TO LNDG.

Narrative: WHILE CRUISING AT FL330, 2 HRS AFTER DEP, L HYD SYS LOST PRESSURE (QUANTITY HIGH). REFERRED TO QRH AND TURNED R SYS TO HIGH AND XFER PUMP ON. SYS RETURNED TO NORMAL PRESSURE FOR 15 MINS. THEN BOTH L AND R SYS SHOWED NO PRESSURE ALONG WITH LOW PRESSURE LIGHTS ILLUMINATED. THAT WAS PRECEDED BY A LOW FREQ WHIRR WHICH INCREASED IN VOLUME OVER A SHORT PERIOD OF TIME. FLT ATTENDANTS CALLED AND ALSO RPTED THE WHIRRING NOISE IN THE CABIN. WE THEN FOLLOWED QRH PROCS FOR TOTAL LOSS OF HYDS. NOTIFIED ATC AND COMPANY DECLARING AN EMER AT THAT TIME. DISPATCH PATCHED ACFT TO MAINT FOR ASSISTANCE. WE THEN WERE ABLE TO REGAIN THE R HYD SYS. WE LANDED AT DEST (DFW) WITH NORMAL R HYD SYS PRESSURE AND NO L HYD SYS PRESSURE. FLT ATTENDANTS AND PAX WERE BRIEFED PER COMPANY PROCS. UNEVENTFUL LNDG AT DFW WITH THE ACFT BEING INSPECTED BY EMER PERSONNEL. TAXIED TO THE GATE AND DEBRIEFED MAINT, CHIEF PLT, AND FAA REPRESENTATIVE.

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.

An MD80 flight crew declared an emergency after losing both hydraulic system. The flight crew was able to regain one of the hydraulic system prior to landing.