SDR ASAA2017012119539

Service difficulty report · Anti-Ice Valve · Boeing 737890

Difficulty date: January 21, 2017
Submitted: January 26, 2017
Operation: Air carrier
Aircraft: N508AS
Make and model: Boeing 737890
Aircraft serial: 35691
Aircraft time: 32,447 hours, 9,786 cycles
Engine: Cfmint CFM567B27
System (JASC): 7510 · Engine Anti-Icing System
Part: Anti-Ice Valve
Part number: 32156184
Part serial: 6410
Condition: Failed
Location: Nr 1 Engine
Part time: 23,622 hours, 7,088 cycles
Stage of operation: IN
How discovered: 9
Nature of condition: O
Precautionary procedure: K

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

What was found

NR 1 ENGINE COWL TAI LIGHT STAYING ON. ACFT GROUNDED. REMOVED AND REPLACED THE NR 1 ENGINE COWL TAI VALVE, REF B737-800 AMM 30-21-11-400-801. INSTALLATION TEST FAILED. PRSOV WILL NOT STAY OPEN, COWL VALVE OPEN LIGHT DOES NOT DIM, REMAINS BRIGHT. REQUIRED FURTHER TROUBLESHOOTING, COMPLETED ENGINE COWL TAI VALVE INSTALLATION TEST, REF B737-800 AMM 30-21-11-400-801 PARAGRAPH I AND J. ALL TEST PASS, LEAK CHECK GOOD.