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2 engine shop technicians report installing the incorrect chocking pads to rb-211 blades during a service bulletin accomplishment.
| Attributes | |
| ACN | 600807 |
| Time | |
| Date | 200311 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe technician : powerplant |
| ASRS Report | 600807 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe technician : powerplant |
| ASRS Report | 600811 |
| Events | |
| Anomaly | maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : far non adherence : published procedure |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : engineering procedure contributing factor : work cards performance deficiency : scheduled maintenance performance deficiency : non compliance with legal requirements performance deficiency : installation performance deficiency : logbook entry |
| Supplementary | |
| Problem Areas | Aircraft Chart Or Publication Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
Service bulletin X is currently being performed on an attrition basis only on rb 211 blades (01 module). When an 01 blade is scrapped a new blade with the service bulletin complied with is installed. The blades that require service bulletin X to be complied with are repair order out to the vendor and are received back with an 8130 attached. The blades must be moment weighed to be reinstalled in the engine. When moment weighing the blades the chocking pads are removed as part of the balance procedure. After moment weighing the vibration dampeners are reinstalled. Thinking the service bulletin had been complied with, which adds a metco coating to the blade root, I moment weighed the blades and installed the chocking pads. However I used pre-service bulletin pads. After completion of the service bulletin different chocking pads are used. Post service bulletin pads: fw 11180, fw 11185. Pre-service bulletin pads: UL33588, UL33592. How many blades are affected I do not know.
Original NASA ASRS Text
Title: 2 ENG SHOP TECHNICIANS RPT INSTALLING THE INCORRECT CHOCKING PADS TO RB-211 BLADES DURING A SVC BULLETIN ACCOMPLISHMENT.
Narrative: SVC BULLETIN X IS CURRENTLY BEING PERFORMED ON AN ATTRITION BASIS ONLY ON RB 211 BLADES (01 MODULE). WHEN AN 01 BLADE IS SCRAPPED A NEW BLADE WITH THE SVC BULLETIN COMPLIED WITH IS INSTALLED. THE BLADES THAT REQUIRE SVC BULLETIN X TO BE COMPLIED WITH ARE REPAIR ORDER OUT TO THE VENDOR AND ARE RECEIVED BACK WITH AN 8130 ATTACHED. THE BLADES MUST BE MOMENT WEIGHED TO BE REINSTALLED IN THE ENG. WHEN MOMENT WEIGHING THE BLADES THE CHOCKING PADS ARE REMOVED AS PART OF THE BAL PROC. AFTER MOMENT WEIGHING THE VIBRATION DAMPENERS ARE REINSTALLED. THINKING THE SVC BULLETIN HAD BEEN COMPLIED WITH, WHICH ADDS A METCO COATING TO THE BLADE ROOT, I MOMENT WEIGHED THE BLADES AND INSTALLED THE CHOCKING PADS. HOWEVER I USED PRE-SVC BULLETIN PADS. AFTER COMPLETION OF THE SVC BULLETIN DIFFERENT CHOCKING PADS ARE USED. POST SVC BULLETIN PADS: FW 11180, FW 11185. PRE-SVC BULLETIN PADS: UL33588, UL33592. HOW MANY BLADES ARE AFFECTED I DO NOT KNOW.
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.