EMB-190 flight crew reported multiple system failures while in cruise and elected to divert and make a precautionary landing
Synopsis
EMB-190 flight crew reported multiple system failures while in cruise and elected to divert and make a precautionary landing
Narrative
Enroute between ZZZZ and ZZZ; we noticed on of the Rudder Actuators in the 'STDBY DIR' mode and flickering to fail (amber dash) mode while scrolling through the system synoptic pages. There was no crew action required at this stage.A little further in the flight; the GROUND SPOILERS FAIL; SPOILER FAULT and SPDBRK FAIL messages appeared simultaneously and were cleared after accomplishing the QRH procedure.Subsequently; AP FAIL; MACH TRIM FAIL and AUTO CONFIG TRIM FAIL appeared and would not clear per the QRH procedure. We then requested a descent to a Non-RVSM altitude and descended to FL260. We calculated that at LRC; we could still make our destination with enough fuel for the alternate and reserves.During the descent FL260 (at this stage with the multiple failures; it is hard for me to recollect but I am pretty sure it was in the descent); SPOILER FAULT; BRK RH FAULT and BRK LH FAULT appeared. Also during the descent; we felt a very noticeable flight control 'bump' in the yoke and aircraft and this was followed by a very noticeable and significant reduced controllability along the longitudinal and lateral axis. Spoiler Panels 1; 3; 8 and 10 were in amber on the systems flight controls synoptic page. The left aileron indication on the flight controls synoptic page showed extended with an Amber X. Additionally; Spoiler Panel 1 now showed unavailable. These spoiler failures would cycle in an out (at some point some spoilers were available and at others they were not). At this stage we decided to [request priority handling] and we proceeded to ZZZZ1. Somewhere along the line; we received an AT FAIL and due to the priority of messages; I decided to ignore it and manually adjust thrust while trying to deal with the higher level messages/faults. The AT FAIL would appear and disappear and it was an additive condition and so I decided to manage thrust manually at this point.Next; AVNX MAU (Modular Avionics Unit) 1A FAIL; ADS1 FAIL; AUTOBRAKE FAIL and HF FAIL appeared along with FDR FWD FAIL; AP RUDDER NOT AVAIL and AUTOLAND 1 NOT AVAIL.Aircraft controllability at this point was significantly reduced. Additionally; thrust changes were accompanied with a very noticeable vibration in the engines. I cannot recall engine vibration levels due to task saturation at that point. I can however state with high degree of confidence that the engine spool up and down did not occur in the normal smooth fashion as it should. I am not sure if this is related to the root causes of all the other failures.We managed to complete the AVNX MAU 1A FAIL QRH and established on a long final approach to ZZZZ1. I wanted to make sure that only small roll and pitch inputs were necessary to establish on final as I was not sure of what other failures to expect from this aircraft and wanted to keep the airspeed slow so as to not aggravate an already dire situation.After landing at ZZZZ1; ELEVATOR LH FAIL; RUDDER FAIL; CREW WRN SYS FAULT; LG NO DISPATCH; FLT CTRL NO DISPATCH; ENG 1 OIL SW FAIL; ENG 2 OIL SW FAIL all appeared in addition to 2 pages of EICAS Messages.There were no injuries or damage to persons; aircraft or property. However this form is being submitted in order to add to the database should such an event occur on the same type of aircraft again.
Second reporter narrative
Enroute between ZZZZ and ZZZ; we noticed on of the Rudder Actuators in the 'STDBY DIR' mode and flickering to fail (amber dash) mode while scrolling through the system synoptic pages. There was no crew action required at this stage.A little further in the flight; the GROUND SPOILERS FAIL; SPOILER FAULT and SPDBRK FAIL messages appeared simultaneously and were cleared after accomplishing the QRH procedure.Subsequently; AP FAIL; MACH TRIM FAIL and AUTO CONFIG TRIM FAIL appeared and would not clear per the QRH procedure. We then requested a descent to a Non-RVSM altitude and descended to FL260. We calculated that at LRC; we could still make our destination with enough fuel for the alternate and reserves.During the descent FL260; SPOILER FAULT; BRK RH FAULT and BRK LH FAULT appeared. Also; during the descent; we felt a very noticeable flight control 'bump' in the yoke and aircraft and this was followed by a very noticeable and significant reduced controllability along the longitudinal and lateral axis. Spoiler Panels 1; 3; 8 and 10 were in amber on the systems flight controls synoptic page. The Left Aileron indication on the flight controls synoptic page showed extended with an Amber X.Additionally; spoiler panel 1 now showed unavailable. These spoiler failures would cycle in an out (at some point some spoilers were available and at others they were not. At this stage we decided to [request priority handling] and we proceeded to ZZZZ1.Somewhere along the line; we received an AT FAIL and due to the priority of messages; the Captain decided to ignore it and manually adjust thrust while trying to deal with the higher level messages/faults. The AT FAIL would appear and disappear; and it was an additive condition and so; the Captain decided to manage thrust manually at this point.Next; AVNX MAU 1A FAIL; ADS1 FAIL; AUTOBRAKE FAIL; and HF FAIL appeared along with FDR FWD FAIL; AP RUDDER NOT AVAIL and AUTOLAND 1 NOT AVAIL.Aircraft controllability at this point was significantly reduced. Additionally; thrust changes were accompanied with a very noticeable vibration in the engines. We believe that the engine spool up and down did not occur in the normal smooth fashion as it should. We [are] not sure if this is related to the root causes of all the other failures. We managed to complete the AVNX MAU 1A FAIL QRH and established on a long final approach to ZZZZ1. The Captain wanted to make sure that only small roll and pitch inputs were necessary to establish on final as I was not sure of what other failures to expect from this aircraft and wanted to keep the airspeed slow so as to not aggravate an already dire situation.After landing at ZZZZ1; ELEVATOR LH FAIL; RUDDER FAIL; CREW WRN SYS FAULT; LG NO DISPATCH; FLT CTRL NO DISPATCH; ENG 1 OIL SW FAIL; ENG 2 OIL SW FAIL all appeared in addition to 2 pages of EICAS Messages.There were no injuries or damage to persons; aircraft or property. However this form is being submitted in order to add to the database should such an event occur on the same type of aircraft again.
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.