Service difficulty report · Cabin Air Sys · Boeing 737990ER

Difficulty date
June 3, 2022
Submitted
June 14, 2022
Operation
Air carrier
Aircraft
N481AS
Make and model
Boeing 737990ER
Aircraft serial
44106
Aircraft time
25,381 hours, 7,980 cycles
Part
Cabin Air Sys
Condition
Warning Light
Stage of operation
NR
How discovered
V
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

LH PACK ILLUMINATES ON RECALL, RESETS WITH MASTER CAUTION RESET. GROUNDED - YES. PERFORMED FIM TASK 21-53 TASK 821, BOTH PZTC HAVE NO FAULTS LOGGED ON PREV FLT AND BITE VERIFY TESTS GOOD W/O FAULTS MSG. VERIFIED LEFT PACK OPS CHECKED NORMAL ON GND.