B737-800 dispatcher reported the flight crew discovered the FMC had an incorrect data load that affe...

Narrative:

Captain contacted dispatch questioning the stab trim setting on the flight for takeoff. Just after I took over the desk; I received a message from the captain stating he wanted an off load audit to examine the load. I contacted the loads supervisor to set up the audit. After the captain landed; we were comparing notes regarding the issue in question when we discovered the data in the FMC was referencing a different aircraft. I contacted tech and maintenance. We took both aircraft out of service for the day. The captain checked the history of the FMC data and discovered this same error on previous flights.the nature or reason for the error is under investigation while both aircraft remain out of service. Unsure until a determinations is made why the data is incorrect.

Original NASA ASRS Text

Title: B737-800 Dispatcher reported the flight crew discovered the FMC had an incorrect data load that affected weight and balance calculations. Reporter stated a second aircraft was found to have the same issue.

Narrative: Captain contacted Dispatch questioning the stab trim setting on the flight for takeoff. Just after I took over the desk; I received a message from the Captain stating he wanted an off load audit to examine the load. I contacted the loads supervisor to set up the audit. After the Captain landed; we were comparing notes regarding the issue in question when we discovered the data in the FMC was referencing a different aircraft. I contacted tech and maintenance. We took both aircraft out of service for the day. The Captain checked the history of the FMC data and discovered this same error on previous flights.The nature or reason for the error is under investigation while both aircraft remain out of service. Unsure until a determinations is made why the data is incorrect.

Data retrieved from NASA's ASRS site 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.

Attributes
ACN	1542775
Time
Date	201805
Local Time Of Day	1201-1800
Place
Locale Reference	ZAB.ARTCC
State Reference	NM
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Component
Aircraft Component	FMS/FMC
Person 1
Function	Dispatcher
Qualification	Dispatch Dispatcher
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural FAR Deviation - Procedural Published Material / Policy Deviation - Procedural Weight And Balance

B737-800 dispatcher reported the flight crew discovered the FMC had an incorrect data load that affected weight and balance calculations. Reporter stated a second aircraft was found to have the same issue.