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A B757-200 mechanic explains source of skydrol hydraulic fluid on the #3 brake assembly heat shield as coming from the upper landing gear area.
| Attributes | |
| ACN | 772946 |
| Time | |
| Date | 200801 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| ASRS Report | 772946 |
| Events | |
| Anomaly | aircraft equipment problem : less severe |
| Independent Detector | other other : 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Factors | |
| Maintenance | contributing factor : manuals contributing factor : briefing |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
It was reported that aircraft #3 main brake assembly was contaminated with skydrol. Skydrol was emitting from upper landing gear area and dripping onto lower landing gear area and not leaking from #3 brake assembly. Found no maintenance manual or gpm reference in regards to a contaminated brake assembly. Observed that skydrol was only on outer brake housing area and did not penetrate into brake segmented stators or rotors which was protected by the #3 tire wheel assembly heat shield. Washed #3 brake assembly with soap and water to remove skydrol fluid. A task was later generated to replace #3 brake assembly as a precautionary action.
Original NASA ASRS Text
Title: A B757-200 MECHANIC EXPLAINS SOURCE OF SKYDROL HYD FLUID ON THE #3 BRAKE ASSEMBLY HEAT SHIELD AS COMING FROM THE UPPER LANDING GEAR AREA.
Narrative: IT WAS RPTED THAT ACFT #3 MAIN BRAKE ASSEMBLY WAS CONTAMINATED WITH SKYDROL. SKYDROL WAS EMITTING FROM UPPER LNDG GEAR AREA AND DRIPPING ONTO LOWER LNDG GEAR AREA AND NOT LEAKING FROM #3 BRAKE ASSEMBLY. FOUND NO MAINT MANUAL OR GPM REF IN REGARDS TO A CONTAMINATED BRAKE ASSEMBLY. OBSERVED THAT SKYDROL WAS ONLY ON OUTER BRAKE HOUSING AREA AND DID NOT PENETRATE INTO BRAKE SEGMENTED STATORS OR ROTORS WHICH WAS PROTECTED BY THE #3 TIRE WHEEL ASSEMBLY HEAT SHIELD. WASHED #3 BRAKE ASSEMBLY WITH SOAP AND WATER TO REMOVE SKYDROL FLUID. A TASK WAS LATER GENERATED TO REPLACE #3 BRAKE ASSEMBLY AS A PRECAUTIONARY ACTION.
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.