A B737 pilot reports wake turbulence at FL230 10 NM in trail of a B757.

Attributes
ACN	808477
Time
Date	200810
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : abq.artcc
State Reference	AZ
Altitude	msl single value : 23000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zab.artcc
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : abq.artcc
Make Model Name	B757 Undifferentiated or Other Model
Flight Phase	climbout : intermediate altitude
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	808477
Events
Anomaly	inflight encounter : wake turbulence other anomaly
Independent Detector	other flight crewa
Resolutory Action	flight crew : regained aircraft control
Supplementary
Problem Areas	Airspace Structure Environmental Factor
Primary Problem	Ambiguous

Narrative:

We were held in position for takeoff on runway 7L behind a departing B757 due to wake turbulence. After appropriate delay we received takeoff clearance and departed. Initial climb was normal; however climbing through approximately 23000 ft we encountered wake turbulence of moderate intensity. Aircraft rolled to the right and I disconnected the autoplt and autothrottle and pitched down and continued the turn to the right in an attempt to exit the vortex. Encounter lasted approximately 3 seconds. After we cleared the turbulence we informed ATC of the encounter and asked for the position of the B757. They reported he was 10 miles ahead of us. We spoke with the cabin crew to ensure there were no injuries and they reported all in cabin were ok. I made an announcement to the passenger and we proceeded uneventfully. ATC did not provide adequate spacing or inform us of the B757's position. I believe in trail spacing should be re-evaluated for wake turbulence behind heavy/larger aircraft. This is the third time I have encountered wake turbulence behind a B757 during climb and on one occasion we were 17 miles in trail and injuries to a cabin crew member resulted. These encounters always present a risk of injury.

Original NASA ASRS Text

Title: A B737 PLT RPTS WAKE TURBULENCE AT FL230 10 NM IN TRAIL OF A B757.

Narrative: WE WERE HELD IN POSITION FOR TAKEOFF ON RWY 7L BEHIND A DEPARTING B757 DUE TO WAKE TURB. AFTER APPROPRIATE DELAY WE RECEIVED TKOF CLRNC AND DEPARTED. INITIAL CLB WAS NORMAL; HOWEVER CLBING THROUGH APPROX 23000 FT WE ENCOUNTERED WAKE TURBULENCE OF MODERATE INTENSITY. ACFT ROLLED TO THE R AND I DISCONNECTED THE AUTOPLT AND AUTOTHROTTLE AND PITCHED DOWN AND CONTINUED THE TURN TO THE R IN AN ATTEMPT TO EXIT THE VORTEX. ENCOUNTER LASTED APPROX 3 SECONDS. AFTER WE CLEARED THE TURB WE INFORMED ATC OF THE ENCOUNTER AND ASKED FOR THE POSITION OF THE B757. THEY RPTED HE WAS 10 MILES AHEAD OF US. WE SPOKE WITH THE CABIN CREW TO ENSURE THERE WERE NO INJURIES AND THEY RPTED ALL IN CABIN WERE OK. I MADE AN ANNOUNCEMENT TO THE PAX AND WE PROCEEDED UNEVENTFULLY. ATC DID NOT PROVIDE ADEQUATE SPACING OR INFORM US OF THE B757'S POSITION. I BELIEVE IN TRAIL SPACING SHOULD BE RE-EVALUATED FOR WAKE TURBULENCE BEHIND HEAVY/LARGER ACFT. THIS IS THE THIRD TIME I HAVE ENCOUNTERED WAKE TURB BEHIND A B757 DURING CLB AND ON ONE OCCASION WE WERE 17 MILES IN TRAIL AND INJURIES TO A CABIN CREW MEMBER RESULTED. THESE ENCOUNTERS ALWAYS PRESENT A RISK OF INJURY.

Data retrieved from NASA's ASRS site as of May 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.