Service difficulty report · Warning System · Boeing 737990ER

Difficulty date
March 14, 2019
Submitted
March 15, 2019
Operation
Air carrier
Aircraft
N423AS
Make and model
Boeing 737990ER
Aircraft serial
35206
Aircraft time
23,236 hours, 7,635 cycles
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

LEFT "PACK" LIGHT ILLUMINATES WHEN MASTER CAUTION RECALL PUSHED. EXTINGUISHES WHEN SYSTEM IS RESET. GROUNDED - YES. REF FIM TASK 21-53 TASK 809, NR 1 PZTC LOGGED RAM AIR ACTUATOR FAULT, RESET FAULT. GVI LEFT RAM AIR DUCT, NO OBSTRUCTIONS NOTED. NR 1 AND NR 2 PZTC BITE TESTED GOOD WITHOUT FAULTS. LEFT PACK OPS CHECKED NORMAL ON GND W/O DEFECTS.