A B737-300 dispatched in non compliance with a yaw damper logbook report that was not corrected and ...

Attributes
ACN	550495
Time
Date	200206
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tower : fxe.tower
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : fcc technician : airframe technician : powerplant
Experience	maintenance avionics : 10 maintenance technician : 18
ASRS Report	550495
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	aircraft equipment problem : critical maintenance problem : non compliance with mel non adherence : far non adherence : published procedure
Independent Detector	aircraft equipment other aircraft equipment : yaw damper coupler test other flight crewa other other : person 1
Resolutory Action	none taken : detected after the fact
Consequence	other
Factors
Maintenance	contributing factor : schedule pressure performance deficiency : non compliance with legal requirements performance deficiency : testing performance deficiency : repair performance deficiency : fault isolation performance deficiency : logbook entry
Supplementary
Problem Areas	Company Maintenance Human Performance Aircraft Chart Or Publication
Primary Problem	Company
Situations
Publication	MEL

Narrative:

Pilot log write-up: yaw damper switch went to off and yaw damper light illuminate in-flight switch was placed to on operation normal. I performed bite check of yaw damper coupler. Bite check was performed per maintenance manual 22-12-32/501 for B737-300/400 bite showed 'pr fault.' maintenance control suggested replacing coupler. I replaced coupler, performed test per maintenance manual 22-12-32. Bite showed 'pr fault.' called maintenance control for MEL. Per MEL special procedure 22-3, the pr valve has to be switched from normal position to high pressure position. After gaining access to valve, found valve already in high position. This meaning previously accomplished, and not set back to normal. Notified maintenance control, aircraft released with new coupler changed for troubleshooting and on MEL 22-3. Logbook entry reads 'special procedure 22-3 accomplished previously.'

Original NASA ASRS Text

Title: A B737-300 DISPATCHED IN NON COMPLIANCE WITH A YAW DAMPER LOGBOOK RPT THAT WAS NOT CORRECTED AND DEFERRED PROPERLY.

Narrative: PLT LOG WRITE-UP: YAW DAMPER SWITCH WENT TO OFF AND YAW DAMPER LIGHT ILLUMINATE INFLT SWITCH WAS PLACED TO ON OP NORMAL. I PERFORMED BITE CHK OF YAW DAMPER COUPLER. BITE CHK WAS PERFORMED PER MAINT MANUAL 22-12-32/501 FOR B737-300/400 BITE SHOWED 'PR FAULT.' MAINT CTL SUGGESTED REPLACING COUPLER. I REPLACED COUPLER, PERFORMED TEST PER MAINT MANUAL 22-12-32. BITE SHOWED 'PR FAULT.' CALLED MAINT CTL FOR MEL. PER MEL SPECIAL PROC 22-3, THE PR VALVE HAS TO BE SWITCHED FROM NORMAL POS TO HIGH PRESSURE POS. AFTER GAINING ACCESS TO VALVE, FOUND VALVE ALREADY IN HIGH POS. THIS MEANING PREVIOUSLY ACCOMPLISHED, AND NOT SET BACK TO NORMAL. NOTIFIED MAINT CTL, ACFT RELEASED WITH NEW COUPLER CHANGED FOR TROUBLESHOOTING AND ON MEL 22-3. LOGBOOK ENTRY READS 'SPECIAL PROC 22-3 ACCOMPLISHED PREVIOUSLY.'

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.

A B737-300 dispatched in non compliance with a yaw damper logbook report that was not corrected and deferred properly.