# SDR ASAA2019022818283

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 21, 2019
- Submitted: February 26, 2019
- Operation: Air carrier
- Aircraft: [N532AS](https://openairdocs.org/aircraft/N532AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 36346
- Aircraft time: 33,844 hours, 10,099 cycles
- System (JASC): [4960 · APU Controls](https://openairdocs.org/jasc/4960)
- Part: Eec
- Part number: 2118966222
- Part serial: 50G0866
- Condition: Failed
- Location: Apu
- Part time: 33,853 hours, 10,102 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: O
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019022818283

## Discrepancy

APU WOULD NOT SHUT DOWN AFTER ENGINE START. GROUNDED - YES. VERIFIED TERMINALS ON THE APU SWITCH ARE SECURE. ACCOMPLISHED APU BITE REF FIM 49-60 TASK 801. NO CURRENT FAULTS OR FAULTS IN HISTORY FOR APU SHUTDOWN. REMOVED & REPLACED ECU REF B737-800 AMM 49-61-12-400-801. 2 EA C/B'S OPENED & CLOSED. INSTALLATION TEST OPS CK GOOD PER THE SAME.

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