Reports of incorrect FMC performance software installation on B737 aircraft.

Attributes
ACN	434542
Time
Date	199904
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : zdc.artcc
State Reference	VA
Altitude	msl single value : 37000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdc.artcc
Operator	common carrier : air carrier
Make Model Name	B737-500
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	cruise : level
Route In Use	enroute airway : ns.airway
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : multi engine pilot : atp pilot : cfi
Experience	flight time last 90 days : 150 flight time total : 7000 flight time type : 3000
ASRS Report	434542
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical non adherence : company policies other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : fmc other flight crewa
Resolutory Action	flight crew : overcame equipment problem none taken : anomaly accepted
Consequence	other
Factors
Maintenance	contributing factor : engineering procedure performance deficiency : installation
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance Maintenance Human Performance Company
Primary Problem	Company

Narrative:

Flying B737-500. During preflight of FMC/CDU, noticed a difference in the confign of CDU displays, ie, it appeared to mimic the B737-700 display. As we are currently flying 700's I assumed this was a new program designed to standardize our fleet. I mentioned the difference to my captain and he agreed with me. We flew 5 legs in that aircraft without incident.

Original NASA ASRS Text

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

Narrative: FLYING B737-500. DURING PREFLT OF FMC/CDU, NOTICED A DIFFERENCE IN THE CONFIGN OF CDU DISPLAYS, IE, IT APPEARED TO MIMIC THE B737-700 DISPLAY. AS WE ARE CURRENTLY FLYING 700'S I ASSUMED THIS WAS A NEW PROGRAM DESIGNED TO STANDARDIZE OUR FLEET. I MENTIONED THE DIFFERENCE TO MY CAPT AND HE AGREED WITH ME. WE FLEW 5 LEGS IN THAT ACFT WITHOUT 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.