# SDR ASAA12511044

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 5, 2012
- Submitted: February 6, 2012
- Operation: Air carrier
- Aircraft: [N566AS](https://openairdocs.org/aircraft/N566AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35181
- Aircraft time: 21,433 hours, 6,345 cycles
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Seal
- Part number: 353A40801
- Condition: Out Of Limits
- Location: Apu
- Stage of operation: IN
- 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/ASAA12511044

## Discrepancy

POWERPLANT ENGINNEERING REQUEST THE APU BE REMOVED.  REMOVED APU REF M/M 49 11 00 000 802 AND T/C 78349010.  FOUND SIGMA SEAL OUT OF LIMITS.  REPLACED SIGMA SEAL REF M/M 49 15 11 400 801.  INSTALLED APU REF M/M 49 11 00 400 802 AND T/C 78349010.  LEAK AND OPS CK GOOD.

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