During descent; an A320 flight crew received ECAM warning hydraulic G res lo. They declared an emerg...

Attributes
ACN	731193
Time
Date	200703
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 13000
Aircraft 1
Controlling Facilities	tracon : zzz.tracon
Operator	common carrier : air carrier
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 210 flight time total : 12000 flight time type : 3000
ASRS Report	731193
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : ecam hyd quant ind other flight crewa
Resolutory Action	flight crew : declared emergency flight crew : landed as precaution
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

During descent ECAM hydraulic G reservoir low air pressure/overheat/low level came on. I directed the first officer to follow steps as I would take care of the flying and communication. ECAM directed us to turn off ptu and green hydraulic pump with the consequent loss of associated system and degradation of some others. We analyzed and discussed as to proper course of action since even though we had the ECAM hydraulic quantity was still showing plus we had a good reading of pressure previous pump shutdown (3000 psi). A hydraulic leak was of course suspected but how bad we really did not know; still the hydraulic quantity seemed to stabilize at some quantity lower than the other system. It made reconsider whether to follow the ECAM steps or to turn the pump back on leaving the ptu off and get back as much of the system as possible. We opted for the latter. Given the circumstances approach was notified that we were declaring an emergency requesting equipment stand by plus the longest available runway. Approach checklists were accomplished flight attendants were notified. Confign of jet; approach and landing were uneventful. Taxi to the gate was done after testing brakes and nosewheel steering.

Original NASA ASRS Text

Title: DURING DESCENT; AN A320 FLT CREW RECEIVED ECAM WARNING HYD G RES LO. THEY DECLARED AN EMERGENCY; COMPLETED THE ECAM PROCEDURE; AND LANDED.

Narrative: DURING DSCNT ECAM HYD G RESERVOIR LOW AIR PRESSURE/OVERHEAT/LOW LEVEL CAME ON. I DIRECTED THE FO TO FOLLOW STEPS AS I WOULD TAKE CARE OF THE FLYING AND COM. ECAM DIRECTED US TO TURN OFF PTU AND GREEN HYD PUMP WITH THE CONSEQUENT LOSS OF ASSOCIATED SYS AND DEGRADATION OF SOME OTHERS. WE ANALYZED AND DISCUSSED AS TO PROPER COURSE OF ACTION SINCE EVEN THOUGH WE HAD THE ECAM HYD QUANTITY WAS STILL SHOWING PLUS WE HAD A GOOD READING OF PRESSURE PREVIOUS PUMP SHUTDOWN (3000 PSI). A HYD LEAK WAS OF COURSE SUSPECTED BUT HOW BAD WE REALLY DID NOT KNOW; STILL THE HYD QUANTITY SEEMED TO STABILIZE AT SOME QUANTITY LOWER THAN THE OTHER SYS. IT MADE RECONSIDER WHETHER TO FOLLOW THE ECAM STEPS OR TO TURN THE PUMP BACK ON LEAVING THE PTU OFF AND GET BACK AS MUCH OF THE SYS AS POSSIBLE. WE OPTED FOR THE LATTER. GIVEN THE CIRCUMSTANCES APCH WAS NOTIFIED THAT WE WERE DECLARING AN EMER REQUESTING EQUIP STAND BY PLUS THE LONGEST AVAILABLE RWY. APCH CHKLISTS WERE ACCOMPLISHED FLT ATTENDANTS WERE NOTIFIED. CONFIGN OF JET; APCH AND LNDG WERE UNEVENTFUL. TAXI TO THE GATE WAS DONE AFTER TESTING BRAKES AND NOSEWHEEL STEERING.

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.

During descent; an A320 flight crew received ECAM warning hydraulic G res lo. They declared an emergency; completed the ECAM procedure; and landed.