ATR72 flight crew declared an emergency after their hydraulic system failed, resulting in the loss of flaps, brakes, nosewheel steering and normal gear extension.

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Attributes
ACN	520900
Time
Date	200108
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : atl.airport
State Reference	GA
Altitude	msl single value : 5000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : ztl.artcc tower : atl.tower
Operator	common carrier : air carrier
Make Model Name	ATR 72
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : atl.tower
Operator	common carrier : air carrier
Make Model Name	DC-9 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground : takeoff roll
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial
Experience	flight time last 90 days : 150 flight time total : 650 flight time type : 300
ASRS Report	520900
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	aircraft equipment problem : critical inflight encounter : wake turbulence other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : hyd system press indicator other flight crewa other flight crewb
Resolutory Action	controller : provided flight assist flight crew : declared emergency flight crew : landed in emergency condition
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Climbing out and en route to atl lost hydraulic flaps, brakes, nosewheel steering and gear extension was lost due to the hydraulic failure. Ran checklist, notified company and ATC. Continued to atl, declared emergency and was given runway 26L but we requested runway 27R and got it. Made no flap landing. Tower let a DC9 take off just prior to our landing, we flew through his wake on short final, was probably not the best thing for our situation. Upon touchdown we lost brakes and steering. Captain got plane clear of runway 27R and we were towed into the gate safely. Other than short final problem with wake turbulence from DC9 no other problems noted. Everything was handled well by company, ATC, and crew.

Original NASA ASRS Text

Title: ATR72 FLC DECLARED AN EMER AFTER THEIR HYD SYS FAILED, RESULTING IN THE LOSS OF FLAPS, BRAKES, NOSEWHEEL STEERING AND NORMAL GEAR EXTENSION.

Narrative: CLBING OUT AND ENRTE TO ATL LOST HYD FLAPS, BRAKES, NOSEWHEEL STEERING AND GEAR EXTENSION WAS LOST DUE TO THE HYD FAILURE. RAN CHKLIST, NOTIFIED COMPANY AND ATC. CONTINUED TO ATL, DECLARED EMER AND WAS GIVEN RWY 26L BUT WE REQUESTED RWY 27R AND GOT IT. MADE NO FLAP LNDG. TWR LET A DC9 TAKE OFF JUST PRIOR TO OUR LNDG, WE FLEW THROUGH HIS WAKE ON SHORT FINAL, WAS PROBABLY NOT THE BEST THING FOR OUR SIT. UPON TOUCHDOWN WE LOST BRAKES AND STEERING. CAPT GOT PLANE CLR OF RWY 27R AND WE WERE TOWED INTO THE GATE SAFELY. OTHER THAN SHORT FINAL PROB WITH WAKE TURB FROM DC9 NO OTHER PROBS NOTED. EVERYTHING WAS HANDLED WELL BY COMPANY, ATC, AND CREW.

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.