SDR ASAA0954328

Service difficulty report · Warning System · Boeing 737890

Difficulty date: January 30, 2009
Submitted: February 2, 2009
Operation: Air carrier
Aircraft: N518AS
Make and model: Boeing 737890
Aircraft serial: 35693
Aircraft time: 24 hours, 20 cycles
System (JASC): 3020 · Air Intake Anti/De-Ice System
Part: Warning System
Condition: Malfunctioned
Location: Anti-Ice System
Stage of operation: NR
How discovered: O
Nature of condition: J
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 ANTI ICE COWL VALVE REMAINS ILLUMINATED BRIGHT WHEN SELECTED ON. ENGINE POWER (THRUST) SELECTION HAS NO EFFECT. GROUNDED YES. CAPT. REPORTED CYCLED NR 1 ENG. COWL SWITCH AND LIGHT WAS SLOW TO GO DIM. AFTER LANDING CREW CYCLED SWITCH SEVERAL TIMES WITH NO DEFECTS. PERFORMED FIM TASK 30 21 00 810 802 WITH NR 1 ENG. AT GROUND IDLE. CYCLED NR 1 ENG. ANTI ICE SWITCH 5 TIMES WITH NO DEFECTS NOTED. INTERMITTENT FAULT WITH NO HISTORY. VERIFICATION FLIGHT OPS CHECKS NORMAL.