2023-12 · NASA ASRS report 2060971
Flight crew reported during flight they experienced several equipment issues. While on descent deploying spoilers; aircraft made a rapid inadvertent roll. The flight crew regained control of the aircraft and landed safely.
We picked Aircraft X up from maintenance out of ZZZ. We were unable to identify what maintenance had exactly done due to data needing to be entered in electronic logbook. All preflight checks were performed and checked out well. We had an uneventful takeoff and climb out. On climb out we noticed our radar altimeter was acting up and saying it was at -5 feet. Everything else looked normal. We were unable to retrieve TA/RA we had TA only. Everything was still ok; but we began to wonder what warning indications we would get during the descent with lower power setting and no gear down or flaps put in. As we started our descent from FL410; my Captain noticed that by reducing to flight idle; we had a loud gear horn; which we expected. We continued our descent down; and knew we would need speedbrakes to slow down and descend to prevent the gear horn from going off at flight idle. My Captain started to use the speedbrakes at FL180. The airplane abruptly went into an uncommanded 50 to 60 degree bank to the left with the autopilot still engaged. My Captain stowed the speedbrakes and the aircraft returned to straight and level flight. All speedbrakes panels on both sides were indicating in the out and up position when we did this. We elected to continue the approach and not use speedbrakes. We got configured with flaps and gear as speeds allowed to slow down and descend on the approach. The rest of the approach and landing was uneventful.
I was pilot flying. The plane was in Maintenance in ZZZ for several days and we were unable to determine what work was performed as the electronic logbook only displays data to be entered". This was the first flight after maintenance. Preflight checks of control surfaces were normal with no discrepancies noted. After takeoff; we noticed the radar altimeter was not working and it remained so for the entire flight; indicating-5 feet elevation. As a result; the TCAS automatically stayed in TA mode only. The RA test button was pressed and after the full test; the RA still was showing -5 and TA ONLY still displayed. As a result of this; the gear horn would sound whenever we went to idle thrust with the gear up.In an unrelated issue; on descent through about FL180; I deployed the spoilers about half deflection with the autopilot engaged and the aircraft rapidly rolled to the left to a 50 Degree bank. Closing the spoilers removed the problem and the autopilot returned wings level. The flight controls display was indicating all spoilers deployed. We continued the flight without using spoilers and landed safely.This 680 fleet routinely has many serious maintenance issues and I've had more emergencies in this fleet than any other flying I've done in my past 10000 hours. I don't feel these old aircraft are safe and yet Company X continues to operate them."
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.
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