An airline dispatcher was not advised of a new route utilized by the flight crew.

Attributes
ACN	441020
Time
Date	199906
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : zma.artcc
State Reference	FL
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Route In Use	enroute other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : commercial pilot : instrument
Events
Anomaly	non adherence : far
Independent Detector	other other : 3
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

The captain requested a route other than filed route and accepted a clearance for route other than the filed route. The crew did not advise dispatch. Dispatch saw an early ETA and sent the flight a request to verify, which they did. Dispatch asked what route they were flying. When dispatch received the information, the data was recalculated and the flight was approximately 3500 pounds overweight for landing. Dispatch spoke to captain on the ground in sjo, captain said he was aware he was overweight and took necessary steps to correct.

Original NASA ASRS Text

Title: AN AIRLINE DISPATCHER WAS NOT ADVISED OF A NEW RTE UTILIZED BY THE FLC.

Narrative: THE CAPT REQUESTED A RTE OTHER THAN FILED RTE AND ACCEPTED A CLRNC FOR RTE OTHER THAN THE FILED RTE. THE CREW DID NOT ADVISE DISPATCH. DISPATCH SAW AN EARLY ETA AND SENT THE FLT A REQUEST TO VERIFY, WHICH THEY DID. DISPATCH ASKED WHAT RTE THEY WERE FLYING. WHEN DISPATCH RECEIVED THE INFO, THE DATA WAS RECALCULATED AND THE FLT WAS APPROX 3500 LBS OVERWT FOR LNDG. DISPATCH SPOKE TO CAPT ON THE GND IN SJO, CAPT SAID HE WAS AWARE HE WAS OVERWT AND TOOK NECESSARY STEPS TO CORRECT.

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.