Cpr small transport made a 240 degree turn to the right to avoid WX without ATC approval.

Attributes
ACN	87552
Time
Date	198805
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : iad
State Reference	VA
Altitude	msl bound lower : 10000 msl bound upper : 10000
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : iad
Operator	general aviation : corporate
Make Model Name	Small Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 90 flight time total : 10000 flight time type : 590
ASRS Report	87552
Person 2
Function	controller : departure
Qualification	controller : radar
Events
Anomaly	inflight encounter : weather non adherence : clearance other spatial deviation
Independent Detector	other controllera other flight crewa
Resolutory Action	controller : issued new clearance other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Direct by iad after takeoff to turn right to heading of 090 degrees, complied. Our WX radar indicated line of thunderstorms 5 mi ahead. Requested heading change. No reply advised we were turning right to avoid thunderstorms to 330 degrees. Controller later called with another heading change and insisted we do not deviate under any circumstances. Cause of problem: controller insisted on endangering crew and passenger by putting aircraft on heading with thunderstorms. Prevention: controller should have WX radar and pilot should continue to have authorization to deviate as necessary to avoid hazards and danger.

Original NASA ASRS Text

Title: CPR SMT MADE A 240 DEGREE TURN TO THE RIGHT TO AVOID WX WITHOUT ATC APPROVAL.

Narrative: DIRECT BY IAD AFTER TKOF TO TURN RIGHT TO HDG OF 090 DEGS, COMPLIED. OUR WX RADAR INDICATED LINE OF TSTMS 5 MI AHEAD. REQUESTED HDG CHANGE. NO REPLY ADVISED WE WERE TURNING RIGHT TO AVOID TSTMS TO 330 DEGS. CTLR LATER CALLED WITH ANOTHER HDG CHANGE AND INSISTED WE DO NOT DEVIATE UNDER ANY CIRCUMSTANCES. CAUSE OF PROB: CTLR INSISTED ON ENDANGERING CREW AND PAX BY PUTTING ACFT ON HDG WITH TSTMS. PREVENTION: CTLR SHOULD HAVE WX RADAR AND PLT SHOULD CONTINUE TO HAVE AUTHORIZATION TO DEVIATE AS NECESSARY TO AVOID HAZARDS AND DANGER.

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