A B737-400 had a CSD unit replaced per job card procedure. The CSD oil cooler was not replaced.

Attributes
ACN	699081
Time
Date	200605
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-400
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
ASRS Report	699081
Person 2
Affiliation	company : air carrier
Function	oversight : supervisor
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : far non adherence : published procedure
Independent Detector	aircraft equipment other aircraft equipment : csd oil temp indicator other other : 1
Resolutory Action	none taken : detected after the fact
Consequence	other other
Factors
Maintenance	contributing factor : schedule pressure contributing factor : tooling performance deficiency : inspection performance deficiency : non compliance with legal requirements performance deficiency : installation
Supplementary
Problem Areas	Maintenance Human Performance Aircraft Chart Or Publication
Primary Problem	Maintenance Human Performance

Narrative:

Task card was completed without removal of the CSD oil cooler. There was confusion in reference to if the cooler must be changed or should be changed. Thus the cooler was not changed. The steps were north/a'ed. There was no inspection stamp adjacent to the signoffs. The aircraft has been in service for over 1 week without any defects.

Original NASA ASRS Text

Title: A B737-400 HAD A CSD UNIT REPLACED PER JOB CARD PROC. THE CSD OIL COOLER WAS NOT REPLACED.

Narrative: TASK CARD WAS COMPLETED WITHOUT REMOVAL OF THE CSD OIL COOLER. THERE WAS CONFUSION IN REF TO IF THE COOLER MUST BE CHANGED OR SHOULD BE CHANGED. THUS THE COOLER WAS NOT CHANGED. THE STEPS WERE N/A'ED. THERE WAS NO INSPECTION STAMP ADJACENT TO THE SIGNOFFS. THE ACFT HAS BEEN IN SVC FOR OVER 1 WK WITHOUT ANY DEFECTS.

Data retrieved from NASA's ASRS site as of January 2009 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.