# SDR ASAA2021112636746

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 26, 2021
- Submitted: November 30, 2021
- Operation: Air carrier
- Aircraft: [N577AS](https://openairdocs.org/aircraft/N577AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35186
- Aircraft time: 52,621 hours, 15,644 cycles
- System (JASC): [7330 · Engine Fuel Indicating System](https://openairdocs.org/jasc/7330)
- Part: Sensor
- Part number: 3404022010
- Part serial: YC0649794
- Condition: Faulty
- Location: #1 Engine
- Part time: 46,157 hours, 13,699 cycles
- 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/ASAA2021112636746

## Discrepancy

WHILE PERFORMING T/C 78273000, SHORT TIME FAULT 73-30901 "T12 SIGNALS DISAGREE" WAS FOUND FOR FLT LEGS 1, 2, & 3 ON ENG #1. GROUNDED - YES. EEC BITE PER T/C 78273000 SHOWED FAULT HAS NOT LOGGED IN LAST EIGHT STARTS, SINCE REPLACEMENT OF T12 SENSOR ON DEFECT 60206442. PERFORMED EEC TEST PER B737-800 AMM 73-21-00-700-804-F00 - ALL TESTS PASS.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.