A B-727 flight crew received an 'immediate' turn clearance while deviating around thunderstorms.

Attributes
ACN	302509
Time
Date	199504
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : atl
State Reference	GA
Altitude	msl bound lower : 12000 msl bound upper : 12000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : atl
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach descent other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : atp pilot : commercial pilot : instrument pilot : flight engineer
Experience	flight time last 90 days : 143 flight time total : 6000 flight time type : 1000
ASRS Report	302509
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	inflight encounter : weather other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Miss Distance	horizontal : 1800
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

Aircraft arriving atl deviating around level 3-5 thunderstorms. Numerous cells in area. Controller cleared flight and deviate was necessary. Flight was between cells deviating as cleared, when controller instructed immediate right turn. Captain took control of aircraft, executed 45-60 degree (angle of bank) turn. TCASII showed no TA/RA information. Traffic visible at 3 mi. No loss of separation believed to have occurred. Controller was extremely busy vectoring numerous aircraft. All airplanes on the arrival were confined to a single approach corridor. Aircraft landed with no further traffic problems.

Original NASA ASRS Text

Title: A B-727 FLC RECEIVED AN 'IMMEDIATE' TURN CLRNC WHILE DEVIATING AROUND TSTMS.

Narrative: ACFT ARRIVING ATL DEVIATING AROUND LEVEL 3-5 TSTMS. NUMEROUS CELLS IN AREA. CTLR CLRED FLT AND DEVIATE WAS NECESSARY. FLT WAS BTWN CELLS DEVIATING AS CLRED, WHEN CTLR INSTRUCTED IMMEDIATE R TURN. CAPT TOOK CTL OF ACFT, EXECUTED 45-60 DEG (ANGLE OF BANK) TURN. TCASII SHOWED NO TA/RA INFO. TFC VISIBLE AT 3 MI. NO LOSS OF SEPARATION BELIEVED TO HAVE OCCURRED. CTLR WAS EXTREMELY BUSY VECTORING NUMEROUS ACFT. ALL AIRPLANES ON THE ARR WERE CONFINED TO A SINGLE APCH CORRIDOR. ACFT LANDED WITH NO FURTHER TFC PROBS.

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.