<< >> NASA ASRS Report 409728, July 1998

Air carrier B727 flight crew experienced system 'a' hydraulic failure on departure climb out and diverted to alternate airport.

Attributes
ACN	409728
Time
Date	199807
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : ach
State Reference	NM
Altitude	msl bound lower : 17500 msl bound upper : 17500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zab
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude other other
Route In Use	departure other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 200 flight time total : 3700 flight time type : 300
ASRS Report	409728
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 6300 flight time type : 620
ASRS Report	410196
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency none taken : unable other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

20 mins after takeoff out of abq, we experienced the loss of our system 'a' hydraulic system (quantity and pressure). Indications were zero pressure and quantity on the 'a' system quantity and pressure indicators. In addition both amber 'a' system low pressure lights on the so panel were on. The first officer instrument panel had the amber 'leading edge flap' light on and the 'aileron, rudder, and elevator system' 'a' lights on. The flight attendants heard a loud pop in the rear of the aircraft as the flight crew noticed the loss of quantity and pressure. All procedures for loss of pressure and quantity for system 'a' were followed in accordance with the checklist. We diverted into dfw and did a 15 degree flap landing (in accordance with the checklist). An uneventful landing was made. We landed and stopped on the runway while we waited for a tug to tow us to the gate.

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Original NASA ASRS Text

Title: ACR B727 FLC EXPERIENCED SYS 'A' HYD FAILURE ON DEP CLBOUT AND DIVERTED TO ALTERNATE ARPT.

Narrative: 20 MINS AFTER TKOF OUT OF ABQ, WE EXPERIENCED THE LOSS OF OUR SYS 'A' HYD SYS (QUANTITY AND PRESSURE). INDICATIONS WERE ZERO PRESSURE AND QUANTITY ON THE 'A' SYS QUANTITY AND PRESSURE INDICATORS. IN ADDITION BOTH AMBER 'A' SYS LOW PRESSURE LIGHTS ON THE SO PANEL WERE ON. THE FO INST PANEL HAD THE AMBER 'LEADING EDGE FLAP' LIGHT ON AND THE 'AILERON, RUDDER, AND ELEVATOR SYS' 'A' LIGHTS ON. THE FLT ATTENDANTS HEARD A LOUD POP IN THE REAR OF THE ACFT AS THE FLC NOTICED THE LOSS OF QUANTITY AND PRESSURE. ALL PROCS FOR LOSS OF PRESSURE AND QUANTITY FOR SYS 'A' WERE FOLLOWED IN ACCORDANCE WITH THE CHKLIST. WE DIVERTED INTO DFW AND DID A 15 DEG FLAP LNDG (IN ACCORDANCE WITH THE CHKLIST). AN UNEVENTFUL LNDG WAS MADE. WE LANDED AND STOPPED ON THE RWY WHILE WE WAITED FOR A TUG TO TOW US TO THE 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.