SDR CA110207003

Service difficulty report · Switch · Lear 45LEAR

Difficulty date: February 5, 2011
Submitted: March 15, 2011
Operation: Air carrier
Make and model: Lear 45LEAR
Aircraft time: 519 hours
System (JASC): 3160 · Central Display
Part: Switch
Condition: Failed
Location: Display
Stage of operation: TX
How discovered: O
Nature of condition: O
Precautionary procedure: H

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

(CAN) AFTER A ONE HOUR FLIGHT, SHORTLY AFTER LANDING THE AIRCRAFT DISPLAY UNIT NR 2 AND 3 STARTED TO SWITCHED INDICATION BACK AND FORTH UNCONTROLLABLY. SYSTEM ALLOWS FOR DU NR 2 AND 3 TO BE SWITCHED BUT ONLY WHEN COMMANDED. AT FIRST A FAULTY REVERSIONNARY SWITCH WAS FOUND AND REPLACED, BUT THE PROBLEM REOCCURRED. THE TWO EICAS CONTROLLERS WERE REPLACED AND WE WERE UNABLE TO REPEAT THE PROBLEM. MORE TROUBLESHOOTING ON THE WAY.