A B757-200 was dispatched in non compliance with #4 brake anti-rotation pin improperly installed. Aircraft incurred damage on landing.

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Attributes
ACN	585610
Time
Date	200306
Day	Wed
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : airframe technician : powerplant
Experience	maintenance technician : 17
ASRS Report	585610
Person 2
Affiliation	company : air carrier
Function	maintenance : inspector
Qualification	technician : powerplant technician : inspection authority technician : airframe
Experience	maintenance technician : 17
ASRS Report	585612
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : company policies non adherence : far non adherence : published procedure
Independent Detector	other other : gnd 1 & 2
Resolutory Action	none taken : detected after the fact
Consequence	other other other
Factors
Maintenance	contributing factor : schedule pressure performance deficiency : inspection performance deficiency : installation performance deficiency : repair
Supplementary
Problem Areas	Aircraft Company Maintenance Human Performance Environmental Factor
Primary Problem	Maintenance Human Performance

Narrative:

On jun/wed/03, I helped change and replace #4 rear brake assembly on aircraft X. I helped remove and install brake assembly and also safety hydraulic fitting to brake. Installed anti-rotation pin only. Let another mechanic install bolt, nut and washer for anti-rotation pin. Cleared area while other mechanic was installing anti-rotation pin assembly. Callback conversation with reporter revealed the following information: the reporter stated the brake was replaced by several technicians and the reporter inserted the anti-rotation pin but left bolt, nut and washer to be installed on the pin by another technician. The reporter said no card was written up to cover the remainder of the job. The reporter said the airplane made 2 lndgs and the pin fell out on the second landing damaging the airplane hydraulic lines and wiring. The reporter stated the anti-rotation pin bolt was never torqued and was on only finger tight.

Original NASA ASRS Text

Title: A B757-200 WAS DISPATCHED IN NON COMPLIANCE WITH #4 BRAKE ANTI-ROTATION PIN IMPROPERLY INSTALLED. ACFT INCURRED DAMAGE ON LNDG.

Narrative: ON JUN/WED/03, I HELPED CHANGE AND REPLACE #4 REAR BRAKE ASSEMBLY ON ACFT X. I HELPED REMOVE AND INSTALL BRAKE ASSEMBLY AND ALSO SAFETY HYD FITTING TO BRAKE. INSTALLED ANTI-ROTATION PIN ONLY. LET ANOTHER MECH INSTALL BOLT, NUT AND WASHER FOR ANTI-ROTATION PIN. CLRED AREA WHILE OTHER MECH WAS INSTALLING ANTI-ROTATION PIN ASSEMBLY. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE BRAKE WAS REPLACED BY SEVERAL TECHNICIANS AND THE RPTR INSERTED THE ANTI-ROTATION PIN BUT LEFT BOLT, NUT AND WASHER TO BE INSTALLED ON THE PIN BY ANOTHER TECHNICIAN. THE RPTR SAID NO CARD WAS WRITTEN UP TO COVER THE REMAINDER OF THE JOB. THE RPTR SAID THE AIRPLANE MADE 2 LNDGS AND THE PIN FELL OUT ON THE SECOND LNDG DAMAGING THE AIRPLANE HYD LINES AND WIRING. THE RPTR STATED THE ANTI-ROTATION PIN BOLT WAS NEVER TORQUED AND WAS ON ONLY FINGER TIGHT.

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.