A300 flight crew reported multiple system failures and both engines N1 mode faulted; which required ...

Narrative:

Soon after beginning descent from fl 350 in icing conditions but with no icing observed; and with engine anti-ice on; captains pfd airspeed indication dropped rapidly into the hook followed by yaw damper 1 and ats (autothrust system) switches tripping off. Soon thereafter engine 1 N1 mode faulted. Transferred aircraft control from captain to first officer. Captain switched air data computer (air data computer) to sys 2 and recovered flight instruments. As captain (pilot monitoring now) was accomplishing ECAM procedures for engine 1 N1 mode fault; engine 2 N1 mode also faulted. Selected altn N1 mode on both engines. Yaw damper 1 would not reset. ECAM directed crew to QRH N1 mode fault procedure. Since both engine N1 modes had faulted crew elected to continue flight with both in N1 modes in altn and ats inop due to uncertainty of cause and complied with engine altn mode QRH checklist.landed with both engines in altn N1 mode; captain air data computer selected to sys 2; yaw damper 1 off; and ats inop. Crew worked well together to deal with the problem and land safely. System malfunctions as yet to be determined by maintenance.

Original NASA ASRS Text

Title: A300 flight crew reported multiple system failures and both engines N1 Mode faulted; which required the selection of Alternate N1 Mode. Flight crew dealt with the problems and landed safely.

Narrative: Soon after beginning descent from FL 350 in icing conditions but with no icing observed; and with engine anti-ice ON; Captains PFD airspeed indication dropped rapidly into the hook followed by Yaw Damper 1 and ATS (Autothrust System) switches tripping off. Soon thereafter Engine 1 N1 Mode faulted. Transferred aircraft control from Captain to First Officer. Captain switched ADC (Air Data Computer) to Sys 2 and recovered flight instruments. As Captain (Pilot Monitoring now) was accomplishing ECAM procedures for Engine 1 N1 Mode Fault; Engine 2 N1 Mode also faulted. Selected ALTN N1 Mode on both engines. Yaw Damper 1 would not reset. ECAM directed crew to QRH N1 Mode Fault Procedure. Since both engine N1 Modes had faulted crew elected to continue flight with both in N1 Modes in ALTN and ATS inop due to uncertainty of cause and complied with ENG ALTN Mode QRH Checklist.Landed with both engines in ALTN N1 Mode; Captain ADC selected to Sys 2; Yaw Damper 1 Off; and ATS inop. Crew worked well together to deal with the problem and land safely. System malfunctions as yet to be determined by maintenance.

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.

Attributes
ACN	1403027
Time
Date	201611
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Make Model Name	A300
Operating Under FAR Part	Part 121
Flight Phase	Descent
Flight Plan	IFR
Component
Aircraft Component	Airspeed Indicator
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical

A300 flight crew reported multiple system failures and both engines N1 mode faulted; which required the selection of alternate N1 mode. Flight crew dealt with the problems and landed safely.