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A dornier 328 had a new nose shock strut assembly installed but needed alignment. Some hardware was removed and reinstalled. Question arose about using the lock washer a second time. Washer was replaced down-line.
| Attributes | |
| ACN | 619601 |
| Time | |
| Date | 200402 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : zzz.tower |
| Operator | common carrier : air carrier |
| Make Model Name | Do 328 TP (Turboprop) |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| Experience | maintenance technician : 3 |
| ASRS Report | 619601 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Events | |
| Anomaly | aircraft equipment problem : less severe maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : far non adherence : published procedure |
| Independent Detector | other other : person 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Factors | |
| Maintenance | contributing factor : work cards contributing factor : manuals performance deficiency : installation |
| Supplementary | |
| Problem Areas | Chart Or Publication Maintenance Human Performance Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
On arriving to work, we were informed the previous shift had installed a new nose landing gear shock strut assembly on aircraft X, but the aircraft still needed the operations check performed. On initial jacking to performance operations check, we found the nose landing gear did not align properly. Following the aircraft jic 32-21-03-420-aao, we proceeded to re-index the strut assembly using all of the required hardware, including the lock washer, nut, proper torques and safety nut in accordance with the jic. We performed the operations check again per the jic, which checked out good. Aircraft signed off and returned to service. Now a question has come up whether the lock washer was serviceable and installed. Washer was serviceable and installed in accordance with the proper jic 32-21-03-420 aao. However, the company had the washer and nut removed and replaced anyway, to make sure no bad parts were installed.
Original NASA ASRS Text
Title: A DORNIER 328 HAD A NEW NOSE SHOCK STRUT ASSEMBLY INSTALLED BUT NEEDED ALIGNMENT. SOME HARDWARE WAS REMOVED AND REINSTALLED. QUESTION AROSE ABOUT USING THE LOCK WASHER A SECOND TIME. WASHER WAS REPLACED DOWN-LINE.
Narrative: ON ARRIVING TO WORK, WE WERE INFORMED THE PREVIOUS SHIFT HAD INSTALLED A NEW NOSE LNDG GEAR SHOCK STRUT ASSEMBLY ON ACFT X, BUT THE ACFT STILL NEEDED THE OPS CHK PERFORMED. ON INITIAL JACKING TO PERFORMANCE OPS CHK, WE FOUND THE NOSE LNDG GEAR DID NOT ALIGN PROPERLY. FOLLOWING THE ACFT JIC 32-21-03-420-AAO, WE PROCEEDED TO RE-INDEX THE STRUT ASSEMBLY USING ALL OF THE REQUIRED HARDWARE, INCLUDING THE LOCK WASHER, NUT, PROPER TORQUES AND SAFETY NUT IN ACCORDANCE WITH THE JIC. WE PERFORMED THE OPS CHK AGAIN PER THE JIC, WHICH CHKED OUT GOOD. ACFT SIGNED OFF AND RETURNED TO SVC. NOW A QUESTION HAS COME UP WHETHER THE LOCK WASHER WAS SERVICEABLE AND INSTALLED. WASHER WAS SERVICEABLE AND INSTALLED IN ACCORDANCE WITH THE PROPER JIC 32-21-03-420 AAO. HOWEVER, THE COMPANY HAD THE WASHER AND NUT REMOVED AND REPLACED ANYWAY, TO MAKE SURE NO BAD PARTS WERE INSTALLED.
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.