Service difficulty report · Warning Light · Lear 45LEAR

Difficulty date
September 15, 2014
Submitted
October 13, 2014
Operation
Air carrier
Aircraft
N918DG
Make and model
Lear 45LEAR
Aircraft serial
251
Aircraft time
3,359 hours, 2,501 cycles
Engine
Hnywl TFE73120BR
Part
Warning Light
Condition
Illuminated
Location
Rt Engine
Stage of operation
CL
How discovered
O
Nature of condition
J
Precautionary procedure
E, A

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

What was found

AFTER DEPARTURE AT ABOUT 10,000FT WHEN THE CREW NOTED THAT THE RT ENGINE ITT INDICATION WAS JUST ABOVE THE NORMAL OPERATING RANGE & WAS INCREASING. ATTEMPTED TO CONTROL THE ENG ITT WITH DIFFERENT POWER SETTINGS. THE ITT THEN ROSE ABOVE THE READINGS ON THE INDICATOR. IT WAS DECIDED AT THAT POINT TO SHUT THE ENG DOWN. THERE WERE NO ENG VIBRATIONS OR ANY OTHER ABNORMAL ENG INDICATIONS DURING THIS TIME. THE REQUIRED CHECKLISTS WERE COMPLETED & ATC WAS NOTIFIED OF THE SITUATION & A REQUEST TO LAND WAS GRANTED. AFTER BURNING OFF FUEL TO MAKE MAX LANDING WEIGHT, THE LANDING WAS UNEVENTFUL. TROUBLESHOOTING & VISUAL INSPECTION OF THE RT ENG FOUND NO DEFECTS WITH THE ENG. ENG RUNS WERE COMPLETED WHILE MONITORING ENG PARAMETERS WITH A DIAGNOSTIC COMPUTER. IT WAS DETERMINED THAT THE ITT READINGS ON INDICATOR WERE FALSE. THE DAU WERE SWAPPED FOR TROUBLESHOOTING & NORMAL ITT READINGS WERE REGISTERED ON INDICATOR. THE DAUS WERE LEFT IN THE SWAPPED POSITION & THE ACFT WAS RETURNED TO SERVICE.