Service difficulty report · Control Valve · Boeing 737890

Difficulty date
February 20, 2021
Submitted
February 23, 2021
Operation
Air carrier
Aircraft
N536AS
Make and model
Boeing 737890
Aircraft serial
35203
Aircraft time
33,520 hours, 9,643 cycles
Part
Control Valve
Condition
Faulted
Location
Nr 1 A/C Pack
Stage of operation
LD
How discovered
O
Nature of condition
J
Precautionary procedure
O

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

What was found

AFTER LANDING NR 1 PACK LIGHT ILLUMINATED. GROUNDED - YES. ACCOMPLISHED BITE CK OF LT PACK CONTROLLER SHOWS TCV FAULT ON THIS PACK. LT PACK LT EXTINGUISHED AFTER CONTROLLER RESET. VERIFIED LT PACK LT DOES NOT ILLUM WITH MASTER CAUTION RECALL.