# SDR UIEA2018082201768

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 20, 2018
- Submitted: August 23, 2018
- Operation: Air carrier
- Aircraft: [N1321A](https://openairdocs.org/aircraft/N1321A), registered now
- Make and model: Boeing 767306
- Aircraft serial: 27957
- Aircraft time: 82,713 hours, 19,262 cycles
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Plenum
- Condition: Contaminated
- Location: Apu
- Stage of operation: CR
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2018082201768

## Discrepancy

AT CRUISE, APPROX 5 MIN AFTER APU START A STRONG ODOR WAS DETECTED. AFTER APU SHUTDOWN THE ODOR DISSIPATED. IT CAME BACK DURING DESCENT AT APPROX 60,000, WITH L PACK OFF THE ODOR WAS LESS NOTICEABLE. PERFORMED FIM 21-00-21 LEFT PACK. FOUND NO TRACES OF OIL IN LT PACK DUCTING. FOUND OIL RESIDUE IN APU PLENUM DURING APU VISUAL INSPECTION. REF LBP 99475, ITEM 6 FOR CORRECTIVE ACTION OF PLENUM.

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