Pilatus PC12 has the ahrs fail during climb on the teb 5 departure. ATC issued an advisory.

Attributes
ACN	699071
Time
Date	200605
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : teb.airport
State Reference	NJ
Altitude	msl single value : 1500
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90.tracon
Operator	general aviation : corporate
Make Model Name	PC-12
Operating Under FAR Part	Part 91
Flight Phase	climbout : initial
Route In Use	departure sid : teterboro
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial pilot : multi engine
Experience	flight time last 90 days : 75 flight time total : 1650 flight time type : 600
ASRS Report	699071
Person 2
Affiliation	government : faa
Function	controller : departure
Events
Anomaly	aircraft equipment problem : critical conflict : airborne less severe non adherence : published procedure non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued advisory flight crew : overcame equipment problem flight crew : returned to original clearance
Consequence	faa : reviewed incident with flight crew other
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Aircraft

Narrative:

Ny departure told me I was off course and close to other traffic. Upon departure from teb on the teb 5 departure; I experienced a failure of ahrs 1 and a partial failure of pilot's EFIS resulting in total loss of pilot's artificial horizon; flight director; automatic pilot; and TCAS; which screen went totally black. Pilot's directional gyro on the secondary EFIS screen appeared to be working; but was in fact precessing. When I discovered the pilot's dg and co-pilot's dg were in conflict; I had to diagnose the problem and determine which one was correct. It would have been simpler and quicker to diagnose and correct if the pilot's dg had simply gone black also. Upon determining that the co-pilot's ahrs was more likely correct; I brought input co-pilot's ahrs into pilot's side EFIS display. Thereafter the flight instruments performed perfectly and I continued my flight without further incident. When I returned to my base; the ahrs 1 unit was found to be defective and was replaced immediately.

Original NASA ASRS Text

Title: PILATUS PC12 HAS THE AHRS FAIL DURING CLB ON THE TEB 5 DEP. ATC ISSUED AN ADVISORY.

Narrative: NY DEP TOLD ME I WAS OFF COURSE AND CLOSE TO OTHER TFC. UPON DEP FROM TEB ON THE TEB 5 DEP; I EXPERIENCED A FAILURE OF AHRS 1 AND A PARTIAL FAILURE OF PLT'S EFIS RESULTING IN TOTAL LOSS OF PLT'S ARTIFICIAL HORIZON; FLT DIRECTOR; AUTO PLT; AND TCAS; WHICH SCREEN WENT TOTALLY BLACK. PLT'S DIRECTIONAL GYRO ON THE SECONDARY EFIS SCREEN APPEARED TO BE WORKING; BUT WAS IN FACT PRECESSING. WHEN I DISCOVERED THE PLT'S DG AND CO-PLT'S DG WERE IN CONFLICT; I HAD TO DIAGNOSE THE PROB AND DETERMINE WHICH ONE WAS CORRECT. IT WOULD HAVE BEEN SIMPLER AND QUICKER TO DIAGNOSE AND CORRECT IF THE PLT'S DG HAD SIMPLY GONE BLACK ALSO. UPON DETERMINING THAT THE CO-PLT'S AHRS WAS MORE LIKELY CORRECT; I BROUGHT INPUT CO-PLT'S AHRS INTO PLT'S SIDE EFIS DISPLAY. THEREAFTER THE FLT INSTRUMENTS PERFORMED PERFECTLY AND I CONTINUED MY FLT WITHOUT FURTHER INCIDENT. WHEN I RETURNED TO MY BASE; THE AHRS 1 UNIT WAS FOUND TO BE DEFECTIVE AND WAS REPLACED IMMEDIATELY.

Data retrieved from NASA's ASRS site as of January 2009 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.