A B727-200 at FL270 diverted due to complete loss of 'a' system hydraulic pressure and quantity.

Attributes
ACN	373407
Time
Date	199707
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : mia
State Reference	FL
Altitude	msl bound lower : 27000 msl bound upper : 27000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zma
Operator	common carrier : air carrier
Make Model Name	B727-200
Operating Under FAR Part	Part 121
Flight Phase	cruise other other other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	373407
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa other other : unspecified cockpit
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

After level off, flight engineer called a system hydraulic quantity decreasing. We ran appropriate checklists, continued to decrease. Took vectors back to mia. Burned down gas, completed checklist and dumped 3000 pounds fuel. Flew ILS to runway 27L. Uneventful landing stop on runway. Pinned and towed to gate.

Original NASA ASRS Text

Title: A B727-200 AT FL270 DIVERTED DUE TO COMPLETE LOSS OF 'A' SYS HYD PRESSURE AND QUANTITY.

Narrative: AFTER LEVEL OFF, FE CALLED A SYS HYD QUANTITY DECREASING. WE RAN APPROPRIATE CHKLISTS, CONTINUED TO DECREASE. TOOK VECTORS BACK TO MIA. BURNED DOWN GAS, COMPLETED CHKLIST AND DUMPED 3000 LBS FUEL. FLEW ILS TO RWY 27L. UNEVENTFUL LNDG STOP ON RWY. PINNED AND TOWED TO GATE.

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.