SDR ASAA2019092030759

Service difficulty report · Warning System · Boeing 737890

Difficulty date: September 20, 2019
Submitted: September 23, 2019
Operation: Air carrier
Aircraft: N557AS
Make and model: Boeing 737890
Aircraft serial: 35176
Aircraft time: 50,971 hours, 14,908 cycles
System (JASC): 2150 · Cabin Cooling System
Part: Warning System
Condition: False Activation
Location: Cockpit
Stage of operation: NR
How discovered: O
Nature of condition: N
Precautionary procedure: O

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

What was found

PUSHING MASTER CAUTION RECALL THE RIGHT PACK LIGHT ILLUMINATES. WHEN PUSHING THE MASTER CAUTION RESET THE RIGHT PACK LIGHT EXTINGUISHES, PER QRH 2.12, PACK (800/900) " NO FURTHER ACTION REQUIRED" (SEA MNT - DISPATCH + FLIGHT FODO NOTIFIED VIA SATCOM @ 19:30Z). GROUNDED - YES. PERFORMED PACK TEMP CONTROL BITE PROCEDURE PER FIM 21-62 TASK 801. FOUND INTERMITTENT FAULT ON RIGHT RAM AIR ACTUATOR. RAN PACKS AND RIGHT PACK LIGHT REMAINED EXTINGUISHED. GROUND VERIFICATION SUCCESSFUL.