A B737-300 had an aileron feel and ctring unit problem; a roller cam arm was installed upside down.

Attributes
ACN	660264
Time
Date	200505
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Aircraft 1
Controlling Facilities	artcc : zhu.artcc
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : powerplant technician : airframe
Experience	maintenance technician : 4
ASRS Report	660264
Person 2
Affiliation	company : air carrier
Function	maintenance : inspector
Qualification	technician : powerplant technician : airframe
Experience	maintenance technician : 8
ASRS Report	660265
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : published procedure non adherence : far
Independent Detector	aircraft equipment other aircraft equipment : control column not centered other other : 1
Resolutory Action	none taken : detected after the fact
Consequence	other
Factors
Maintenance	contributing factor : manuals contributing factor : work cards performance deficiency : installation performance deficiency : logbook entry performance deficiency : non compliance with legal requirements performance deficiency : testing
Supplementary
Problem Areas	Maintenance Human Performance Aircraft Chart Or Publication
Primary Problem	Maintenance Human Performance
Situations
Publication	Maint Manual Chap 27

Narrative:

The roller cam arm was placed in upside down after changing the bearing. The cam arm passed the operations check with the hydraulics off like it said to do in step 16.2. I missed a north/a on step 19 which states; 'if the roller spring adjustment was changed; proceed to step 19. If no adjustments were changed; proceed to step 20 and north/a 19.' (discrepancy was discovered when hydraulic power was applied to system and control column would not center.) recommendation: add a step to turn on hydraulics to make sure ctring unit ctrs.

Original NASA ASRS Text

Title: A B737-300 HAD AN AILERON FEEL AND CTRING UNIT PROB; A ROLLER CAM ARM WAS INSTALLED UPSIDE DOWN.

Narrative: THE ROLLER CAM ARM WAS PLACED IN UPSIDE DOWN AFTER CHANGING THE BEARING. THE CAM ARM PASSED THE OPS CHK WITH THE HYDS OFF LIKE IT SAID TO DO IN STEP 16.2. I MISSED A N/A ON STEP 19 WHICH STATES; 'IF THE ROLLER SPRING ADJUSTMENT WAS CHANGED; PROCEED TO STEP 19. IF NO ADJUSTMENTS WERE CHANGED; PROCEED TO STEP 20 AND N/A 19.' (DISCREPANCY WAS DISCOVERED WHEN HYD PWR WAS APPLIED TO SYS AND CTL COLUMN WOULD NOT CENTER.) RECOMMENDATION: ADD A STEP TO TURN ON HYDS TO MAKE SURE CTRING UNIT CTRS.

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.