G-iv flight crew reported an air data computer failure and the arrival flown using standby instrumen...

Attributes
ACN	1743743
Time
Date	202005
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZZ.ARTCC
State Reference	FO
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Make Model Name	Gulfstream IV / G350 / G450
Operating Under FAR Part	Part 135
Flight Phase	Descent
Route In Use	Vectors Direct STAR ZZZZZ
Flight Plan	IFR
Component
Aircraft Component	Air Data Computer
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Flight Instructor Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 75 Flight Crew Total 5000 Flight Crew Type 1100
Person 2
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor Flight Crew Instrument
Experience	Flight Crew Last 90 Days 75 Flight Crew Total 5000 Flight Crew Type 1100
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

During cruise flight at FL450 about one hour prior to decent we experienced a dadc (digital air data computer) fault. A dadc miscompare cas message was displayed and the appropriate afm quick reference handbook procedure was accomplished. We continued the flight with both captain and first officer operating with a single dadc. As we commenced our decent into ZZZZ; the air data information displayed by the remaining dadc did not agree with the standby flight instruments; all automation was disengaged and the remainder of the flight was conducted by reference to the standby flight instruments. We [advised ATC] and continued to land on runway xx.

Original NASA ASRS Text

Title: G-IV flight crew reported an air data computer failure and the arrival flown using standby instruments.

Narrative: During cruise flight at FL450 about one hour prior to decent we experienced a DADC (Digital Air Data Computer) fault. A DADC Miscompare CAS Message was displayed and the appropriate AFM Quick Reference Handbook procedure was accomplished. We continued the flight with both Captain and First Officer operating with a single DADC. As we commenced our decent into ZZZZ; the Air Data information displayed by the remaining DADC did not agree with the Standby Flight Instruments; all automation was disengaged and the remainder of the flight was conducted by reference to the Standby Flight Instruments. We [advised ATC] and continued to land on Runway XX.

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.

G-iv flight crew reported an air data computer failure and the arrival flown using standby instruments.