Mechanic explains how the maintenance task card for a dhc-8-400 aircraft did not direct mechanic to check for brake hydraulic line rubbing during tire rotation after brake was previously installed.

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Attributes
ACN	794247
Time
Date	200807
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Q400 (Formerly Dash 8-400)
Operating Under FAR Part	Part 121
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
ASRS Report	794247
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : published procedure non adherence : far
Independent Detector	other other : 1
Resolutory Action	none taken : detected after the fact
Consequence	other
Factors
Maintenance	contributing factor : work cards contributing factor : briefing contributing factor : engineering procedure performance deficiency : inspection performance deficiency : scheduled maintenance performance deficiency : non compliance with legal requirements performance deficiency : installation
Supplementary
Problem Areas	Maintenance Human Performance Chart Or Publication
Primary Problem	Chart Or Publication

Narrative:

We were repacking #1 strut; aircraft was in the air on all jacks. #1 strut was fully extended for removing of strut assembly. Job required removal of wheels and brakes. At the time of assembly for #1 brake hydraulic line; aircraft was jacked; strut fully extended; task card used was unclr for hydraulic line alignment due to the fact that wheels were not put on until aircraft was ready to be placed back on the ground. Other mechanics helped me with wheel installation. Brake was already assembled at the time when tire was put on. I was in the mind set for wheel installation and not brake. Task card at that stage didn't direct in checking if brake hydraulic line would be rubbed; when strut is compressed and tire rotated. Task card was not clear on wheel rotation inspection when wheel is installed on aircraft.

Original NASA ASRS Text

Title: MECHANIC EXPLAINS HOW THE MAINT TASK CARD FOR A DHC-8-400 ACFT DID NOT DIRECT MECHANIC TO CHECK FOR BRAKE HYD LINE RUBBING DURING TIRE ROTATION AFTER BRAKE WAS PREVIOUSLY INSTALLED.

Narrative: WE WERE REPACKING #1 STRUT; ACFT WAS IN THE AIR ON ALL JACKS. #1 STRUT WAS FULLY EXTENDED FOR REMOVING OF STRUT ASSEMBLY. JOB REQUIRED REMOVAL OF WHEELS AND BRAKES. AT THE TIME OF ASSEMBLY FOR #1 BRAKE HYD LINE; ACFT WAS JACKED; STRUT FULLY EXTENDED; TASK CARD USED WAS UNCLR FOR HYD LINE ALIGNMENT DUE TO THE FACT THAT WHEELS WERE NOT PUT ON UNTIL ACFT WAS READY TO BE PLACED BACK ON THE GND. OTHER MECHS HELPED ME WITH WHEEL INSTALLATION. BRAKE WAS ALREADY ASSEMBLED AT THE TIME WHEN TIRE WAS PUT ON. I WAS IN THE MIND SET FOR WHEEL INSTALLATION AND NOT BRAKE. TASK CARD AT THAT STAGE DIDN'T DIRECT IN CHKING IF BRAKE HYD LINE WOULD BE RUBBED; WHEN STRUT IS COMPRESSED AND TIRE ROTATED. TASK CARD WAS NOT CLR ON WHEEL ROTATION INSPECTION WHEN WHEEL IS INSTALLED ON ACFT.

Data retrieved from NASA's ASRS site as of May 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.