Medium large transport has both cathode screens on PF side fail as takeoff roll. Takeoff aborted.

Attributes
ACN	244588
Time
Date	199306
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : chs
State Reference	SC
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	climbout : takeoff other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial pilot : atp
Experience	flight time last 90 days : 210 flight time total : 30000 flight time type : 2100
ASRS Report	244588
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : rejected takeoff other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Takeoff rejected at 100 ft due altitude, heading reporting system (ahrs) failure of copilot's instruments. Ahrs reset according to procedure. Successful takeoff 20 mins later. Callback conversation with reporter revealed the following information: reporter states the abbreviation ahrs is for altitude, heading reporting system, similar to an irt. The 2 screens on first officer side failed. If he had not been PF, they would not have aborted. This equipment is prone to this problem of cutting off on taxi or at the gate. They have never had it occur on takeoff before. Equipment is very sensitive to metal and reacts if several baggage carts are near the aircraft. SOP is to merely reset the circuit breakers. Company is in the process of replacing this equipment.

Original NASA ASRS Text

Title: MLG HAS BOTH CATHODE SCREENS ON PF SIDE FAIL AS TKOF ROLL. TKOF ABORTED.

Narrative: TKOF REJECTED AT 100 FT DUE ALT, HDG RPTING SYS (AHRS) FAILURE OF COPLT'S INSTS. AHRS RESET ACCORDING TO PROC. SUCCESSFUL TKOF 20 MINS LATER. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATES THE ABBREVIATION AHRS IS FOR ALT, HDG RPTING SYS, SIMILAR TO AN IRT. THE 2 SCREENS ON FO SIDE FAILED. IF HE HAD NOT BEEN PF, THEY WOULD NOT HAVE ABORTED. THIS EQUIP IS PRONE TO THIS PROB OF CUTTING OFF ON TAXI OR AT THE GATE. THEY HAVE NEVER HAD IT OCCUR ON TKOF BEFORE. EQUIP IS VERY SENSITIVE TO METAL AND REACTS IF SEVERAL BAGGAGE CARTS ARE NEAR THE ACFT. SOP IS TO MERELY RESET THE CIRCUIT BREAKERS. COMPANY IS IN THE PROCESS OF REPLACING THIS EQUIP.

Data retrieved from NASA's ASRS site as of July 2007 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.