# SDR ASAA2021030534249

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 5, 2021
- Submitted: March 9, 2021
- Operation: Air carrier
- Aircraft: [N588AS](https://openairdocs.org/aircraft/N588AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35685
- Aircraft time: 47,690 hours, 14,211 cycles
- Engine: Cfmint CFM567B27
- System (JASC): [7397 · Engine Fuel System Wiring](https://openairdocs.org/jasc/7397)
- Part: Connector
- Condition: Detached
- Location: Nr 1 Engine
- Stage of operation: IN
- How discovered: 9
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021030534249

## Discrepancy

WHILE ACCOMPLISHING TC 78273000 # 1 ENG. MAINT. FAULT 73-30901 T12 SIGNAL DISAGREE. SHORT TIME FAULT. GROUNDED - YES. ACCOMPLISHED T/S FOR FAULT 73-30901 PER B737-800 FIM 73-26 TASK 805 - INITIAL EVALUATION (EEC TEST) CONFIRMED FAULT AND INPUT MONITORING SHOWED T12 SENSOR CHANNEL B INPUT AS DASHES. ACCOMPLISHED FAULT ISOLATION PROCEDURE FOR DUAL CHANNEL FAULT PER FIM PARAGRAPH G - FOUND CONNECTOR DJ0804J FOR T12 SENSOR CHANNEL B OUTPUT NOT CONNECTED TO BULKHEAD RECEPTACLE. CLEANED AND INSPECTED CONNECTOR - NO DEFECTS NOTED AND THREADS ON CONNECTOR AND RECEPTACLE WERE SERVICEABLE. REINSTALLED AND SECURED T12 CHANNEL B CONNECTOR, CHECKED CHANNEL A CONNECTOR FOR SECURITY, AND PERFORMED EEC TEST PER B737-800 AMM 73-21-00-700-804-F00 - ALL TESTS PASS. INPUT MONITORING SHOWS NORMAL INPUT FROM T12 SENSOR CHANNELS A AND B.

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