# SDR ASAA2021112636748

- 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/ASAA2021112636748

## Discrepancy

WHILE PERFORMING T/C 78273000, LONG TIME FAULT 73-20811 "THE T12 SIGNAL IS OUT OF RANGE" WAS FOUND FOR LEGS 1, 2, & 3 ON ENG #1. GROUNDED - YES. REF LP 60206442 FOR T12 SENSOR REPLACEMENT THAT CLEARED THIS FAULT ON THE EEC BITE TEST. FLIGHT VERIFICATION RECOMMENDED TO CLEAR THIS FAULT FROM "RECENT FAULTS" ON CDU INTERROGATION.

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