|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||0001 To 0600|
|Locale Reference||airport : zzz.airport|
|Operator||common carrier : air carrier|
|Make Model Name||Challenger CL600|
|Operating Under FAR Part||Part 121|
|Flight Phase||ground : maintenance|
|Affiliation||company : air carrier|
|Function||maintenance : technician|
|Qualification||technician : powerplant|
technician : airframe
|Affiliation||company : air carrier|
|Function||maintenance : lead technician|
|Anomaly||maintenance problem : improper maintenance|
|Independent Detector||other other : 1|
|Maintenance||contributing factor : work cards|
performance deficiency : unqualified personnel
performance deficiency : non compliance with legal requirements
performance deficiency : training
|Problem Areas||Chart Or Publication|
Maintenance Human Performance
|Primary Problem||Maintenance Human Performance|
|Publication||Maint Manual Job Card|
Prior to starting the removal of the bonding wire I went to the book to find the procedure which has no hydraulic precautions only electrical. I used this task to replace the bonding wire and while we were working lead technician turned on hydraulics. After the event I asked lead technician what happened and she said 'I saw you guys working on the spoiler but I turned on hydraulics anyway; I just wasn't thinking.' she also stated that 'she didn't think the hydraulics would affect the spoilers.' during a service check I was replacing a bonding wire on a flight spoiler when the hydraulics were actuated by the lead technician without notifying the other mechanics or checking to see if the control surfaces were clear. My screw driver was wedged between the spoiler and the wing which resulted in damage to the aircraft. The spoiler was changed. The task for changing the bonding wire has only electrical precautions not precautions for the system the wire is attached to. At the end of the night maintenance was filling out the paperwork and used the removal of the flight spoiler task for the bonding wire sign-off instead of bonding wire procedure. He asked me to sign the bonding wire and still being flustered and shaken-up from almost losing my hand I didn't think to check the reference that I was signing. The reason the spoiler reference was used for the bonding wire sign off was because at that time we had been removing the damaged spoiler.
Original NASA ASRS Text
Title: A CL600 DURING A SPOILER BONDING WIRE REPLACEMENT HYDRAULIC POWER WAS INADVERTENTLY APPLIED CAUSING SPOILER DAMAGE.
Narrative: PRIOR TO STARTING THE REMOVAL OF THE BONDING WIRE I WENT TO THE BOOK TO FIND THE PROC WHICH HAS NO HYD PRECAUTIONS ONLY ELECTRICAL. I USED THIS TASK TO REPLACE THE BONDING WIRE AND WHILE WE WERE WORKING LEAD TECHNICIAN TURNED ON HYDS. AFTER THE EVENT I ASKED LEAD TECHNICIAN WHAT HAPPENED AND SHE SAID 'I SAW YOU GUYS WORKING ON THE SPOILER BUT I TURNED ON HYDS ANYWAY; I JUST WASN'T THINKING.' SHE ALSO STATED THAT 'SHE DIDN'T THINK THE HYDS WOULD AFFECT THE SPOILERS.' DURING A SVC CHK I WAS REPLACING A BONDING WIRE ON A FLT SPOILER WHEN THE HYDS WERE ACTUATED BY THE LEAD TECHNICIAN WITHOUT NOTIFYING THE OTHER MECHS OR CHKING TO SEE IF THE CTL SURFACES WERE CLR. MY SCREW DRIVER WAS WEDGED BTWN THE SPOILER AND THE WING WHICH RESULTED IN DAMAGE TO THE ACFT. THE SPOILER WAS CHANGED. THE TASK FOR CHANGING THE BONDING WIRE HAS ONLY ELECTRICAL PRECAUTIONS NOT PRECAUTIONS FOR THE SYS THE WIRE IS ATTACHED TO. AT THE END OF THE NIGHT MAINT WAS FILLING OUT THE PAPERWORK AND USED THE REMOVAL OF THE FLT SPOILER TASK FOR THE BONDING WIRE SIGN-OFF INSTEAD OF BONDING WIRE PROC. HE ASKED ME TO SIGN THE BONDING WIRE AND STILL BEING FLUSTERED AND SHAKEN-UP FROM ALMOST LOSING MY HAND I DIDN'T THINK TO CHK THE REF THAT I WAS SIGNING. THE REASON THE SPOILER REF WAS USED FOR THE BONDING WIRE SIGN OFF WAS BECAUSE AT THAT TIME WE HAD BEEN REMOVING THE DAMAGED SPOILER.
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.