# SDR ASAA2019042629133

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 22, 2019
- Submitted: April 26, 2019
- Operation: Air carrier
- Aircraft: [N409AS](https://openairdocs.org/aircraft/N409AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41733
- Aircraft time: 24,857 hours, 8,147 cycles
- Engine: Cfmint CFM567B27E
- System (JASC): [7830 · Engine Thrust Reverser](https://openairdocs.org/jasc/7830)
- Part: Fault Code
- Condition: False Activation
- 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/ASAA2019042629133

## Discrepancy

WHILE PERFORMING T/C 78273000 FOUND FAULT CODE 73-21271 #1 ENG. ALT VOLTAGE TO EEC OUT OF RANGE. GROUNDED - YES. ACCOMPLISHED #1 EEC BITE, NO FAULTS LOGGED IN RECENT 0-3 AND FAULT HISTORY LEGS 0-10. ACCOMPLISHED #1 EEC TEST REF B737-900 AMM 73-21-00, TEST PASSED.

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