Mechanic report of maintenance error in failure to safety wire a castle nut.

Attributes
ACN	308586
Time
Date	199506
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : clt
State Reference	NC
Altitude	agl bound lower : 0 agl bound upper : 0
Aircraft 1
Controlling Facilities	artcc : zfw
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	ground : preflight other
Person 1
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	308586
Person 2
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
Events
Anomaly	non adherence : published procedure non adherence : far other anomaly other
Independent Detector	other other : unspecified
Resolutory Action	other
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

Aircraft, anti-skid left main gear inoperative. Disconnected transducers for trouble-shooting. Found broken wire on l- hand inboard anti-skid lower wire harness. Jacked left main gear, removed inboard tire and disconnected torque links to gain access to harness at axle. To turn wrench, removed and replaced anti-skid lower harness, reinstalled tire, reconnected torque links, torque link bolt and safety bolt and castle nut. Anti-skid system operations checked good, aircraft was dispatched. I did not remember if I safetied castle nut on safety bolt on torque links. Called maintenance foreman in charlotte and then maintenance control in abcd. Aircraft was returned to charlotte airport in which I check safety bolt and found castle nut had backed off and safety bolt fell out. I requested aircraft to be grounded until new bolt was shipped from abcd, and next shift made aircraft airworthy and returned it to service.

Original NASA ASRS Text

Title: MECH RPT OF MAINT ERROR IN FAILURE TO SAFETY WIRE A CASTLE NUT.

Narrative: ACFT, ANTI-SKID LEFT MAIN GEAR INOP. DISCONNECTED TRANSDUCERS FOR TROUBLE-SHOOTING. FOUND BROKEN WIRE ON L- HAND INBOARD ANTI-SKID LOWER WIRE HARNESS. JACKED L MAIN GEAR, REMOVED INBOARD TIRE AND DISCONNECTED TORQUE LINKS TO GAIN ACCESS TO HARNESS AT AXLE. TO TURN WRENCH, REMOVED AND REPLACED ANTI-SKID LOWER HARNESS, REINSTALLED TIRE, RECONNECTED TORQUE LINKS, TORQUE LINK BOLT AND SAFETY BOLT AND CASTLE NUT. ANTI-SKID SYS OPS CHKED GOOD, ACFT WAS DISPATCHED. I DID NOT REMEMBER IF I SAFETIED CASTLE NUT ON SAFETY BOLT ON TORQUE LINKS. CALLED MAINT FOREMAN IN CHARLOTTE AND THEN MAINT CTL IN ABCD. ACFT WAS RETURNED TO CHARLOTTE ARPT IN WHICH I CHK SAFETY BOLT AND FOUND CASTLE NUT HAD BACKED OFF AND SAFETY BOLT FELL OUT. I REQUESTED ACFT TO BE GNDED UNTIL NEW BOLT WAS SHIPPED FROM ABCD, AND NEXT SHIFT MADE ACFT AIRWORTHY AND RETURNED IT TO SVC.

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.