<< >> NASA ASRS Report 786199, May 2008

A320 flight crew reports exceeding 250 KTS below 10000 ft while looking for preceding heavy jet producing wake turbulence.

Attributes
ACN	786199
Time
Date	200805
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : lax.airport
State Reference	CA
Altitude	msl single value : 9200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sct.tracon
Operator	common carrier : air carrier
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	arrival star : seavu
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : sct.tracon
Operator	common carrier : air carrier
Make Model Name	Airbus Industrie Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	arrival star : seavu
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 18000 flight time type : 8000
ASRS Report	786199
Events
Anomaly	inflight encounter : wake turbulence non adherence : far other anomaly
Independent Detector	aircraft equipment other aircraft equipment : ecam other flight crewa
Resolutory Action	flight crew : returned to original clearance
Supplementary
Problem Areas	Environmental Factor Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

We were on approach to runway 24R at lax in selected speed; as assigned by ATC; on managed seavu arrival descent. We were following a heavy airbus which had resulted in some minor wake turbulence. I continued to try to keep the traffic in sight when I noticed that PF had descended through 10000 ft and was still at selected speed of 270 KTS. I immediately told him and I selected 250 KTS to slow the airplane. Airspeed exceeded message on ECAM and I noticed the speed exceedance on instruments. Selected 250 KTS speed. We were both concerned about wake turbulence from heavy jet and therefore trying to keep that airplane in sight that we neglected to notice that we had exceeded 250 KTS below 10000 ft. The PF should fly the airplane and pm should monitor the flying.

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Original NASA ASRS Text

Title: A320 FLT CREW RPTS EXCEEDING 250 KTS BELOW 10000 FT WHILE LOOKING FOR PRECEDING HEAVY JET PRODUCING WAKE TURBULENCE.

Narrative: WE WERE ON APCH TO RWY 24R AT LAX IN SELECTED SPEED; AS ASSIGNED BY ATC; ON MANAGED SEAVU ARR DSCNT. WE WERE FOLLOWING A HEAVY AIRBUS WHICH HAD RESULTED IN SOME MINOR WAKE TURBULENCE. I CONTINUED TO TRY TO KEEP THE TFC IN SIGHT WHEN I NOTICED THAT PF HAD DSNDED THROUGH 10000 FT AND WAS STILL AT SELECTED SPEED OF 270 KTS. I IMMEDIATELY TOLD HIM AND I SELECTED 250 KTS TO SLOW THE AIRPLANE. AIRSPEED EXCEEDED MESSAGE ON ECAM AND I NOTICED THE SPEED EXCEEDANCE ON INSTRUMENTS. SELECTED 250 KTS SPEED. WE WERE BOTH CONCERNED ABOUT WAKE TURBULENCE FROM HEAVY JET AND THEREFORE TRYING TO KEEP THAT AIRPLANE IN SIGHT THAT WE NEGLECTED TO NOTICE THAT WE HAD EXCEEDED 250 KTS BELOW 10000 FT. THE PF SHOULD FLY THE AIRPLANE AND PM SHOULD MONITOR THE FLYING.

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.