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A DH8-100 experienced an uncommanded roll disconnect on landing and was incorrectly repaired with engineering approval using a worn bushing.
| Attributes | |
| ACN | 372603 |
| Time | |
| Date | 199706 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz |
| State Reference | US |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Dash 8-100 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | other |
| Flight Plan | None |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| Qualification | other other : other |
| ASRS Report | 372603 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | other personnel other other personnel other |
| Qualification | other other : other |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : far non adherence : published procedure other anomaly other |
| Independent Detector | other flight crewa other other : unspecified cockpit |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
On touchdown, an aircraft had an uncommanded roll disconnect. Upon investigation done by the previous shift, bushings on the roll disconnect assembly were found to be worn. With no bushings in stock, an eo was written to remove bushing from an old assembly that was in the parts department and place them in the assembly with the worn bushings. The next step was to paint the area where the bushings would ride to build up the material and reassemble and try to disconnect the assembly. This was done and no, the system did not disconnect.
Original NASA ASRS Text
Title: A DH8-100 EXPERIENCED AN UNCOMMANDED ROLL DISCONNECT ON LNDG AND WAS INCORRECTLY REPAIRED WITH ENGINEERING APPROVAL USING A WORN BUSHING.
Narrative: ON TOUCHDOWN, AN ACFT HAD AN UNCOMMANDED ROLL DISCONNECT. UPON INVESTIGATION DONE BY THE PREVIOUS SHIFT, BUSHINGS ON THE ROLL DISCONNECT ASSEMBLY WERE FOUND TO BE WORN. WITH NO BUSHINGS IN STOCK, AN EO WAS WRITTEN TO REMOVE BUSHING FROM AN OLD ASSEMBLY THAT WAS IN THE PARTS DEPT AND PLACE THEM IN THE ASSEMBLY WITH THE WORN BUSHINGS. THE NEXT STEP WAS TO PAINT THE AREA WHERE THE BUSHINGS WOULD RIDE TO BUILD UP THE MATERIAL AND REASSEMBLE AND TRY TO DISCONNECT THE ASSEMBLY. THIS WAS DONE AND NO, THE SYS DID NOT DISCONNECT.
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.