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A B757-200 during a weekly check was left unattended with the parking brake disconnected. Technician making brake wear check was distraction with personal injury.
| Attributes | |
| ACN | 616008 |
| Time | |
| Date | 200404 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| 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 |
| Flight Phase | ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe technician : powerplant |
| Experience | maintenance technician : 2.6 |
| ASRS Report | 616008 |
| Events | |
| Anomaly | aircraft equipment problem : less severe maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : far non adherence : published procedure non adherence : company policies |
| Independent Detector | aircraft equipment other aircraft equipment : parking brake light other other : person 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other other |
| Factors | |
| Maintenance | performance deficiency : scheduled maintenance performance deficiency : non compliance with legal requirements |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
While accomplishing weekly check items on the aircraft (a B757) on apr/thu/04, I was in the process of checking exterior items and found brake wear indicators on 1 or 2 of the main landing gear brakes to be close to, but within, limits of 1/16 inch or less indication on wear pin. I routinely make sure parking brake is applied after completing outside items on the check. I was servicing hydraulic system and accidentally sprayed or dripped hydraulic fluid in my right eye. I proceeded to go flush eyes and remove damaged contact lens. After about 2 hours, I returned to complete tasks, but may have forgotten to check and make sure the parking brakes were set. I realized this 3-4 days later while working another B757 check. If parking brake was not set as above mentioned, brake might be out of limits per weekly check.
Original NASA ASRS Text
Title: A B757-200 DURING A WKLY CHK WAS LEFT UNATTENDED WITH THE PARKING BRAKE DISCONNECTED. TECHNICIAN MAKING BRAKE WEAR CHK WAS DISTR WITH PERSONAL INJURY.
Narrative: WHILE ACCOMPLISHING WKLY CHK ITEMS ON THE ACFT (A B757) ON APR/THU/04, I WAS IN THE PROCESS OF CHKING EXTERIOR ITEMS AND FOUND BRAKE WEAR INDICATORS ON 1 OR 2 OF THE MAIN LNDG GEAR BRAKES TO BE CLOSE TO, BUT WITHIN, LIMITS OF 1/16 INCH OR LESS INDICATION ON WEAR PIN. I ROUTINELY MAKE SURE PARKING BRAKE IS APPLIED AFTER COMPLETING OUTSIDE ITEMS ON THE CHK. I WAS SVCING HYD SYS AND ACCIDENTALLY SPRAYED OR DRIPPED HYD FLUID IN MY R EYE. I PROCEEDED TO GO FLUSH EYES AND REMOVE DAMAGED CONTACT LENS. AFTER ABOUT 2 HRS, I RETURNED TO COMPLETE TASKS, BUT MAY HAVE FORGOTTEN TO CHK AND MAKE SURE THE PARKING BRAKES WERE SET. I REALIZED THIS 3-4 DAYS LATER WHILE WORKING ANOTHER B757 CHK. IF PARKING BRAKE WAS NOT SET AS ABOVE MENTIONED, BRAKE MIGHT BE OUT OF LIMITS PER WKLY CHK.
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.