# SDR ASAA2017103122438

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 31, 2017
- Submitted: December 12, 2017
- Operation: Air carrier
- Aircraft: [N577AS](https://openairdocs.org/aircraft/N577AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35186
- Aircraft time: 40,334 hours, 12,013 cycles
- Engine: Cfmint CFM567B27
- System (JASC): [7397 · Engine Fuel System Wiring](https://openairdocs.org/jasc/7397)
- Part: Connector
- Condition: Corroded
- Location: T3 Sensor
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017103122438

## Discrepancy

PERFORMED T/C 78273000, NR 2 ENGINE HAS LONG TIME FAULT 75-10832,  THE T3 SIGNAL IS OUT OF RANGE.  ACFT GROUNDED.  VERIFIED DEFECT, FAULT LOGGED IN RECENT AND FAULT HISTORY LEGS 0 THRU 10.  FOUND THE T3 SENSOR VALUES HIGHER THAN NR 1 ENGINE.  WHILE REMOVING T3 SENSOR CONNECTORS FOUND EVIDENCE OF CORROSION IAW WDM 75-31-21.  CLEANED THE CONNECTORS DP1005 AND DP0905 AT T3 SENSOR AND DP0909 AND DP1010 AT THE EEC.  RAN THE NR 2 ENGINE, NO FAULTS LOGGED IN FLIGHT LEG 0. EEC TEST PASSED IAW AMM 73-21-00.

---
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.