# SDR UIEA2019050104094

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 28, 2019
- Submitted: May 2, 2019
- Operation: Air carrier
- Aircraft: [N1381A](https://openairdocs.org/aircraft/N1381A), registered now
- Make and model: Boeing 767316
- Aircraft serial: 27615
- Aircraft time: 86,119 hours, 18,417 cycles
- System (JASC): [7730 · Engine Ignition Analyzer System](https://openairdocs.org/jasc/7730)
- Part: Pimu
- Condition: Malfunctioned
- Location: Lt Engine
- Stage of operation: DE
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2019050104094

## Discrepancy

ON DESCENT WITH POWER AT IDLE LEFT N1 FLUCTUATIONS UP TO 55%. ALSO FUEL FLOW FLUCTUATIONS UP TO 300.(<P>LP 1052645 - 1: PERFORMED FIM TASK 71-01 FT 810 PER 71- FAULT CODE DIAGRAM FIG 5 SHEET 2. NO FAULTS FOUND. FIM PERFORMED WITH AND WITHOUT ENGINE RUN PROCEDURES, BOTH NO FAULTS PER MCC. REMOVED AND REPLACED PIMU IAW AMM 77-35-02, OPS CHECK GOOD. </P><P>(P/N OFF: <SPAN>28ST0607-17, S/N: </SPAN><SPAN>000445)</SPAN></P><P>LP 1052646 - M6: PERFORMED MCDP TESTS 2 AND 30 IAW AMM 22-00-02.  NO FAULTS FOUND.</P><P>LP 1052647 - M7: PERFORMED INSPECTION OF CIT SENSOR CANNON PLUGS1 AND WIRING IAW AMM 73-21-02.  NO DAMAGE OR CORROSION NOTED.</P><P>LP 1052647 - M9:  PERFORMED INSPECTION OF N1 AND N2 SPEED SENSORS CANNON PLUGS AND WIRING IAW AMM 77-12-01  AND 77-12-02.  NO DAMAGE OR CORROSION NOTED. </P><P>LP 1052648 - M12: <SPAN>REMOVED AND REPLACED H1 ENGINE HMV. NO LEAKS NOTED, IDLE RUN, CHECK GOOD. OPS CHECK GOOD IAW 73-21-14.</SPAN><BR /></P><P><SPAN>(P/N OFF: 441789, S/N: BECK3835)</SPAN></P><P><SPAN>LP 1052649 - M13: REMOVED L ENG CIT SENSOR TO FOM IAW B767 AMM 73-21-03</SPAN></P><P><SPAN>LP 1052649 - M14: REPLACED LT CIT SENSOR IAW AMM 73-21-02.  NR 1 LT ENGINE FLUCTUATION, NO FURTHER DEFECTS NOTED. PERFORMED HIGH POWER ENGINE RUNS IAW AMM 71-00-00.  NO FAULTS NOTED</SPAN></P>)

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