Reports of incorrect FMC performance software installation on B737 aircraft.

Attributes
ACN	434983
Time
Date	199904
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : mco.airport
State Reference	FL
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : mco.tower
Operator	common carrier : air carrier
Make Model Name	B737-500
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	ground : preflight
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 260 flight time total : 9000 flight time type : 5000
ASRS Report	434983
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : multi engine
Events
Anomaly	aircraft equipment problem : critical non adherence : company policies
Independent Detector	aircraft equipment other aircraft equipment : fmc other flight crewa
Resolutory Action	flight crew : overcame equipment problem none taken : anomaly accepted
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance Company Aircraft Maintenance Human Performance
Primary Problem	Company

Narrative:

Aircraft was a B737-500. Software loaded into FMC at some previous date was version for B737-700. First officer noticed difference when programming CDU prior to takeoff. Both pilots thought that this new software was now being put in B737-300's and 500's. Onboard performance computer data (ie, speeds) was checked against CDU each leg with no noticeable differences.

Original NASA ASRS Text

Title: RPTS OF INCORRECT FMC PERFORMANCE SOFTWARE INSTALLATION ON B737 ACFT.

Narrative: ACFT WAS A B737-500. SOFTWARE LOADED INTO FMC AT SOME PREVIOUS DATE WAS VERSION FOR B737-700. FO NOTICED DIFFERENCE WHEN PROGRAMMING CDU PRIOR TO TKOF. BOTH PLTS THOUGHT THAT THIS NEW SOFTWARE WAS NOW BEING PUT IN B737-300'S AND 500'S. ONBOARD PERFORMANCE COMPUTER DATA (IE, SPDS) WAS CHKED AGAINST CDU EACH LEG WITH NO NOTICEABLE DIFFERENCES.

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.