SDR UIEA2023040300306

Service difficulty report · Unknown · Boeing 76733A

Difficulty date: April 3, 2023
Submitted: April 4, 2023
Operation: Air carrier
Aircraft: N1997A
Make and model: Boeing 76733A
Aircraft serial: 27310
Aircraft time: 103,933 hours, 22,049 cycles
System (JASC): 4900 · Airborne Auxiliary Power Unit (APU) System
Part: Unknown
Condition: Unknown
Location: Unknown
Stage of operation: IN
How discovered: O
Nature of condition: O
Precautionary procedure: O

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

What was found

ECM 2023P-168 N1997A ENG #1 ESN #702928 IS EXPERIENCING HIGH FAN VIBRATION. A TRIM BALANCE IS REQUIRED TSLV 10,240 CSLV 3,348.(<P>PERFORMED LH ENG RUN UP PER AMM 71-00-00. INCREASED N2 POWER TO 99% & FAN VIB DID NOT EXCEED 0.9. NO DISCREPANCY NOTED. OPS CHECK GOOD. </P>)

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