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Technician reported that during a previous repair to slat; incorrect fasteners were installed allowing damage to occur as a result of duct joint blowout. Proper fasteners should have been installed per the ipc (illustrated parts catalog).
| Attributes | |
| ACN | 1598817 |
| Time | |
| Date | 201811 |
| Aircraft 1 | |
| Make Model Name | B767-300 and 300 ER |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Person 1 | |
| Function | Other / Unknown |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Maintenance Deviation - Procedural Published Material / Policy |
Narrative:
Aircraft X had damage to number 5 slat O/B rib when the duct joint blew out which caused the lower fitting assembly to break off causing damage to the outer rib on the O/B side of the slat at location 531.75. The fitting assembly was attached with screws and nuts which is wrong per the ipc [illustrated parts catalog]. The rivets it calls out for are bacr15ba5a; which would allow the rivet to shear in this event; not causing any structural damage. This damaged rib is not repairable. I have dealt with this before on other 767-300 and they were grounded because of wrong fasteners installed. I noticed on the number 4 slat the same fasteners are installed at these locations which should be rivets.inspect slats for proper fasteners installed so this doesn't happen again and cause a slat change.
Original NASA ASRS Text
Title: Technician reported that during a previous repair to slat; incorrect fasteners were installed allowing damage to occur as a result of duct joint blowout. Proper fasteners should have been installed per the IPC (Illustrated Parts Catalog).
Narrative: Aircraft X had damage to Number 5 slat O/B rib when the duct joint blew out which caused the lower fitting assembly to break off causing damage to the outer rib on the O/B side of the slat at location 531.75. The fitting assembly was attached with screws and nuts which is wrong per the IPC [Illustrated Parts Catalog]. The rivets it calls out for are BACR15BA5A; which would allow the rivet to shear in this event; not causing any structural damage. This damaged rib is not repairable. I have dealt with this before on other 767-300 and they were grounded because of wrong fasteners installed. I noticed on the Number 4 slat the same fasteners are installed at these locations which should be rivets.Inspect slats for proper fasteners installed so this doesn't happen again and cause a slat change.
Data retrieved from NASA's ASRS site 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.