SDR CA030307002

Service difficulty report · Engine · Lear 35LEAR

Difficulty date: March 7, 2003
Submitted: April 14, 2003
Operation: Air carrier
Make and model: Lear 35LEAR
Aircraft time: 17,664 hours
Engine: Garrtt TFE73122B
System (JASC): 7230 · Turbine Engine Compressor Section
Part: Engine
Condition: Vibration
Part time: 15,899 hours
Stage of operation: DE
How discovered: O
Nature of condition: R, J
Precautionary procedure: O

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

What was found

(CAN) PILOT REPORTED AIRFRAME VIBRATION WHEN POWER RETARDED DURING DESCENT (FROM 94 TO 88 PERCENT). ITT FLUCTUATING AS LOW AS 200 DEGREES. ENGINE N1 & N2 FLUCTUATES .5 TO 1.5 PERCENT DURING CRUISE WITH LOW BUZZING.UPON INSPECTION OF INLET, FOUND FOD DAMAGE ON 3 LP COMPRESSOR STATOR BLADE (2 BENT BLADE) REAR ACOUSTICLINER AROUND THE 12 O'CLOCK POSITION AND BLADE RUB STRIPE AROUND THE THE 10 O'CLOCK POSITION.