Deviation from clearance. Air carrier, without declaring an emergency, flew their own route around WX (keeping controller informed) towards their destination.

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Attributes
ACN	301407
Time
Date	199504
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : lev
State Reference	LA
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zhu tracon : sea
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	301407
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
ASRS Report	301576
Events
Anomaly	inflight encounter : weather non adherence : clearance other anomaly other other spatial deviation
Independent Detector	other controllera other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other

Narrative:

En route msy, rerted south of msy to lev direct tibby due to thunderstorms. Beyond lev on west course toward tibby, ATC stated intent send us to lft for sequencing msy. Thunderstorms between us and lft precluded direct lft. Fuel and direction of flight away from destination and alternate became a concern. Rejected clearance to lft and started south to east turn, informing ATC of my intent to turn eastbound away from WX and toward destination/alternate. ATC issued direction for westerly course approximately 3 times while we continued an eastbound turn, informing ATC of heading and progress. Established eastbound, requested clearance to bhm alternate unless more direct route to msy was available. Filing as soon as possible due to possible conflict with ATC over repeated rejection of ATC instruction to maintain west course. Never declared minimum fuel or emergency. However, without this action, either was possible result. Actual result was direct msy without further incident.

Original NASA ASRS Text

Title: DEV FROM CLRNC. ACR, WITHOUT DECLARING AN EMER, FLEW THEIR OWN RTE AROUND WX (KEEPING CTLR INFORMED) TOWARDS THEIR DEST.

Narrative: ENRTE MSY, RERTED S OF MSY TO LEV DIRECT TIBBY DUE TO TSTMS. BEYOND LEV ON W COURSE TOWARD TIBBY, ATC STATED INTENT SEND US TO LFT FOR SEQUENCING MSY. TSTMS BTWN US AND LFT PRECLUDED DIRECT LFT. FUEL AND DIRECTION OF FLT AWAY FROM DEST AND ALTERNATE BECAME A CONCERN. REJECTED CLRNC TO LFT AND STARTED S TO E TURN, INFORMING ATC OF MY INTENT TO TURN EBOUND AWAY FROM WX AND TOWARD DEST/ALTERNATE. ATC ISSUED DIRECTION FOR WESTERLY COURSE APPROX 3 TIMES WHILE WE CONTINUED AN EBOUND TURN, INFORMING ATC OF HDG AND PROGRESS. ESTABLISHED EBOUND, REQUESTED CLRNC TO BHM ALTERNATE UNLESS MORE DIRECT RTE TO MSY WAS AVAILABLE. FILING ASAP DUE TO POSSIBLE CONFLICT WITH ATC OVER REPEATED REJECTION OF ATC INSTRUCTION TO MAINTAIN W COURSE. NEVER DECLARED MINIMUM FUEL OR EMER. HOWEVER, WITHOUT THIS ACTION, EITHER WAS POSSIBLE RESULT. ACTUAL RESULT WAS DIRECT MSY WITHOUT FURTHER INCIDENT.

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.