# SDR ASAA2018030923792

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 9, 2018
- Submitted: March 9, 2018
- Operation: Air carrier
- Aircraft: [N453AS](https://openairdocs.org/aircraft/N453AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36354
- Aircraft time: 16,493 hours, 5,467 cycles
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Ecu
- Part number: 707208601
- Part serial: 6505150200675
- Condition: Faulted
- Location: Apu
- Part time: 16,493 hours, 5,467 cycles
- Stage of operation: IN
- How discovered: O
- Nature of condition: N
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018030923792

## Discrepancy

MATENANCE BLUE LIGHT ON WITH OIL LEVEL FOUND FULL.  ACFT GROUNDED.   REVIEWED MAINTENANCE HISTORY ON APU BITE, NO FAULTS ASSOCIATED WITH DMM.  REMOVED & REPLACED THE APU ECU IAW AMM 49-61-12.  GROUND VERIFICATION TEST PASSED.

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