Narrative:

Approximately 30 min into the flight; during cruise @ FL360; the #2 autopilot clicked off; accompanied by ECAM alert the #2 INS had faulted/failed. After stabilizing the aircraft; and engaging #1 autopilot; we completed the INS fault QRH procedure. The first officer (first officer) was pilot flying; and reported he had lost all airspeed info; the flight director; and other info on his flight display in addition to that normally associated with loss of INS. Reviewing QRH for air data computer failure; many listed items were similar to those lost on the first officer display. Concerned that we may have also lost the air data computer; (although we did not get an ECAM alert); the first officer selected #3 on his navigation switching panel to regain lost display items. In reviewing QRH procedures for a failed air data computer; loss of rvsm capability was a result of failure. We notified ATC of our issues; and to be safe; elected to descend from rvsm airspace as required of a air data computer failure. We inspected and found no associated circuit breaker's open. We then informed [dispatch] and [maintenance] of our issues; and requested [dispatch] to recalculate fuel burn for continued flight to [ZZZ] @FL270. Receiving the new fuel data; and comparing to our FMS calculations; continuing to [ZZZ] would have us arriving with 11;000lbs. FOD. [ZZZ] ATIS was reporting ILS 32 approaches in use due to winds. Also; we were having to divert course due to en route weather. Given all these factors; I elected to divert to [ZZZ1]; due to limited fuel reserves and the possibility of delays upon arrival at [ZZZ]. Great support from center; [dispatch] and excellent job by first officer.

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Original NASA ASRS Text

Title: A300 Captain reported diverting to an alternate after loss of multiple components resulting from failure of #2 INS.

Narrative: Approximately 30 min into the flight; during cruise @ FL360; the #2 autopilot clicked off; accompanied by ECAM alert the #2 INS had faulted/failed. After stabilizing the aircraft; and engaging #1 autopilot; we completed the INS Fault QRH procedure. The First Officer (FO) was pilot flying; and reported he had lost all airspeed info; the flight director; and other info on his flight display in addition to that normally associated with loss of INS. Reviewing QRH for ADC failure; many listed items were similar to those lost on the FO display. Concerned that we may have also lost the ADC; (although we did not get an ECAM alert); the FO selected #3 on his NAV switching panel to regain lost display items. In reviewing QRH procedures for a failed ADC; loss of RVSM capability was a result of failure. We notified ATC of our issues; and to be safe; elected to descend from RVSM airspace as required of a ADC failure. We inspected and found no associated CB's open. We then informed [dispatch] and [maintenance] of our issues; and requested [dispatch] to recalculate fuel burn for continued flight to [ZZZ] @FL270. Receiving the new fuel data; and comparing to our FMS calculations; continuing to [ZZZ] would have us arriving with 11;000lbs. FOD. [ZZZ] ATIS was reporting ILS 32 approaches in use due to winds. Also; we were having to divert course due to en route weather. Given all these factors; I elected to divert to [ZZZ1]; due to limited fuel reserves and the possibility of delays upon arrival at [ZZZ]. Great support from center; [dispatch] and excellent job by FO.

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.