# SDR ASAA2015021510659

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 15, 2015
- Submitted: February 17, 2015
- Operation: Air carrier
- Aircraft: [N563AS](https://openairdocs.org/aircraft/N563AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35180
- Aircraft time: 31,789 hours, 9,687 cycles
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Seal
- Part number: 353A40801
- Condition: Out Of Limits
- Location: Apu
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2015021510659

## Discrepancy

APU SIGMA SEAL HEIGHT IS OUT OF LIMITS IAW TC 78349000.  ACFT GROUNDED.  R & R SIGMA SEAL IAW AMM 49-15-11-000-801 & 49-15-11-400-801.

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