SDR ASAA2018021023477

Service difficulty report · Connector · Boeing 737990ER

Difficulty date: February 10, 2018
Submitted: February 12, 2018
Operation: Air carrier
Aircraft: N461AS
Make and model: Boeing 737990ER
Aircraft serial: 36363
Aircraft time: 15,434 hours, 5,093 cycles
System (JASC): 3097 · Ice/Rain Protection System Wiring
Part: Connector
Condition: Contaminated
Location: Solenoid Valve
Part time: 1,204 hours, 431 cycles
Stage of operation: TX
How discovered: 9
Nature of condition: O
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

DURING PREFLIGHT INSPECTION, FOUND THE NR 1 ENGINE, FOUND THE ENGINE & WING CONTROL CIRCUIT BREAKER OPEN. ACFT GROUNDED IAW SSM 30-11-11. NR 2 ENGINE GROUND WING THERMAL ANTI-ICE SOLENOID RESISTANCE READS HIGH AT P5-11 CONNECTOR D648 PIN 29. DISCONNECTED THE CONNECTOR AND FOUND THE SOLENOID CONNECTOR CONTAMINATED. REMOVED AND REPLACED THE SOLENOID VALVE IAW AMM 30-11-12-400-801, STEPS 3A THROUGH 3H(S). OPS CHECKED NORMAL. GROUND VERIFICATION GOOD.