A B737-300 was released for service with #2 engine inboard fan cowl strake missing.

Attributes
ACN	473620
Time
Date	200005
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Flight Phase	ground : parked ground : maintenance
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Qualification	technician : airframe technician : powerplant
Experience	maintenance technician : 11
ASRS Report	473620
Person 2
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : powerplant technician : airframe
Experience	maintenance technician : 12
ASRS Report	473617
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : published procedure
Resolutory Action	other
Consequence	other
Factors
Maintenance	contributing factor : work cards contributing factor : manuals performance deficiency : inspection performance deficiency : repair performance deficiency : installation
Supplementary
Problem Areas	Company Maintenance Human Performance Chart Or Publication Aircraft
Primary Problem	Maintenance Human Performance

Narrative:

Working open items on a B737-300, the #2 inboard fan cowl was robbed for outstation aircraft. Temporarily installed new fan cowl for engine test run for main engine control replacement. Following successful engine run, permanently installed cowl and the required placards. The aircraft was then returned to service and taxied to the gate for a flight. On the preflight it was discovered that the strake was missing from the fan cowl. The flight was canceled and the strake was installed. On review, found steps were omitted from the maintenance manual procedure for the installation of fan cowl and the strake was not installed.

Original NASA ASRS Text

Title: A B737-300 WAS RELEASED FOR SVC WITH #2 ENG INBOARD FAN COWL STRAKE MISSING.

Narrative: WORKING OPEN ITEMS ON A B737-300, THE #2 INBOARD FAN COWL WAS ROBBED FOR OUTSTATION ACFT. TEMPORARILY INSTALLED NEW FAN COWL FOR ENG TEST RUN FOR MAIN ENG CTL REPLACEMENT. FOLLOWING SUCCESSFUL ENG RUN, PERMANENTLY INSTALLED COWL AND THE REQUIRED PLACARDS. THE ACFT WAS THEN RETURNED TO SVC AND TAXIED TO THE GATE FOR A FLT. ON THE PREFLT IT WAS DISCOVERED THAT THE STRAKE WAS MISSING FROM THE FAN COWL. THE FLT WAS CANCELED AND THE STRAKE WAS INSTALLED. ON REVIEW, FOUND STEPS WERE OMITTED FROM THE MAINT MANUAL PROC FOR THE INSTALLATION OF FAN COWL AND THE STRAKE WAS NOT INSTALLED.

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.