Service difficulty report · Controller · Boeing 737*

Difficulty date
March 26, 2022
Submitted
March 28, 2022
Operation
Air carrier
Aircraft
N845NN
Make and model
Boeing 737*
Aircraft serial
40579
Aircraft time
34,979 hours, 14,213 cycles
Part
Controller
Part number
2193301AC
Part serial
0996181
Condition
Unserviceable
Location
Zone 100 - Fuse
Stage of operation
CL
How discovered
V
Nature of condition
J
Precautionary procedure
A

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

What was found

AIRCRAFT WAS GROUNDED: AUTO PRESSURIZATION FAILED AFTER TAKEOFF. EMERGENCY DECLARED AND FLIGHT RETURNED TO SJO LANDING SAFELY. REPLACED CABIN PRESSURE CONTROLLER #1 (AALA202203282405) AND #2 (AALA202203285971) PER AMM 21-31-01-400-801. REPLACED CABIN PRESSURE SELECTOR PANEL P5-6 (AALA202203285263) PER AMM 21-31-02-400-801. ACCOMPLISHED SATISFACTORY OPERATIONAL CHECK.