A DHC8-100 reported stiff ailerons in left turns due to aileron cables found off center wing pulley ...

Attributes
ACN	386682
Time
Date	199711
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz
State Reference	US
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Dash 8-100
Operating Under FAR Part	Part 121
Flight Phase	other
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	386682
Person 2
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	386529
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

On nov/xx/97 an aileron cable came off a pulley. The cable guard was found to be out of the bracket. The last documented maintenance was performed jun/xy/96. In jun/96 the cable was found to be frayed and a replacement cable was manufactured and installed. I came in on the replacement the following shift. The exact details of what I inspected at the time, I do not recall. A new procedure regarding signing off maintenance has recently been initiated so as to clarify who did what and is responsible for the maintenance performed. Callback conversation with reporter revealed the following information: the reporter stated the guide pin was in good shape and was not damaged or worn but could not confirm if a lock pin had been installed. The reporter said there was no evidence of a lock pin but it could have been bumped and dislodged at some time after the aileron cable replacement. The reporter also stated that if the lock pin were not installed when the cable was replaced the aileron report would have surfaced sooner than 15 months. The reporter said there were no previous log write-ups on the ailerons.

Original NASA ASRS Text

Title: A DHC8-100 RPTED STIFF AILERONS IN L TURNS DUE TO AILERON CABLES FOUND OFF CTR WING PULLEY CAUSED BY A PULLEY GUIDE PIN MIGRATION.

Narrative: ON NOV/XX/97 AN AILERON CABLE CAME OFF A PULLEY. THE CABLE GUARD WAS FOUND TO BE OUT OF THE BRACKET. THE LAST DOCUMENTED MAINT WAS PERFORMED JUN/XY/96. IN JUN/96 THE CABLE WAS FOUND TO BE FRAYED AND A REPLACEMENT CABLE WAS MANUFACTURED AND INSTALLED. I CAME IN ON THE REPLACEMENT THE FOLLOWING SHIFT. THE EXACT DETAILS OF WHAT I INSPECTED AT THE TIME, I DO NOT RECALL. A NEW PROC REGARDING SIGNING OFF MAINT HAS RECENTLY BEEN INITIATED SO AS TO CLARIFY WHO DID WHAT AND IS RESPONSIBLE FOR THE MAINT PERFORMED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE GUIDE PIN WAS IN GOOD SHAPE AND WAS NOT DAMAGED OR WORN BUT COULD NOT CONFIRM IF A LOCK PIN HAD BEEN INSTALLED. THE RPTR SAID THERE WAS NO EVIDENCE OF A LOCK PIN BUT IT COULD HAVE BEEN BUMPED AND DISLODGED AT SOME TIME AFTER THE AILERON CABLE REPLACEMENT. THE RPTR ALSO STATED THAT IF THE LOCK PIN WERE NOT INSTALLED WHEN THE CABLE WAS REPLACED THE AILERON RPT WOULD HAVE SURFACED SOONER THAN 15 MONTHS. THE RPTR SAID THERE WERE NO PREVIOUS LOG WRITE-UPS ON THE AILERONS.

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 DHC8-100 reported stiff ailerons in left turns due to aileron cables found off center wing pulley caused by a pulley guide pin migration.