# SDR ASAA2016100518225

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 5, 2016
- Submitted: October 25, 2016
- Operation: Air carrier
- Aircraft: [N457AS](https://openairdocs.org/aircraft/N457AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36355
- Aircraft time: 10,604 hours, 3,480 cycles
- Engine: Cfmint CFM567B27E
- System (JASC): [7397 · Engine Fuel System Wiring](https://openairdocs.org/jasc/7397)
- Part: Connector
- Condition: Damaged
- Location: Cdt 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/ASAA2016100518225

## Discrepancy

FOUND FAULT CODE 75-20832 ON NR 2 ENGINE CDU CHECK.  THE T3 SIGNAL IS OUT OF RANGE LONG TERM FAULT.  ACFT GROUNDED.  ACCOMPLISHED T/S FOR FAULT 75-20832 IAW FIM 75-33 TASK 803 - EEC BITE SHOWED FAULT LOGGED FOR TWO OUT OF TEN LEGS AND INPUT MONITORING SHOWED CHANNEL B INPUT READING 50 DEGREES HIGHER THAN CHANNEL A.  REMOVED THE NR 2 ENGINE T3 SENSOR CONNECTORS DP0905 AND DP1005, CLEANED CONNECTORS AND INSPECTED IAW AMM 70-70-01-200-801-F00.  PIN RETENTION CHECKS GOOD. REINSTALLED DP0905 AND DP1005 AND PERFORMED EEC TEST IAW AMM 73-21-00-700-804-F00, NO FAULTS NOTED.  INPUT MONITORING SHOWED T3 INPUTS FOR CHANNEL A AND CHANNEL B TO BE THE SAME.

---
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.