SDR IPXA2024052327333

Service difficulty report · Warning Message · Boeing 75724APF

Difficulty date: May 23, 2024
Submitted: May 24, 2024
Operation: Air carrier
Aircraft: N423UP
Make and model: Boeing 75724APF
Aircraft serial: 25325
Aircraft time: 34,313 hours, 22,518 cycles
System (JASC): 2130 · Cabin Pressure Control System
Part: Warning Message
Condition: Illuminated
Location: Cabin Pressure
Stage of operation: CL
How discovered: O
Nature of condition: J
Precautionary procedure: B

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

What was found

**ATB** **SDR FILED OPEN**AT TOP OF CLIMB, FL400, RECEIVED CABIN ALTITUDE WARNING, CABIN AUTO INOP. AIR TURN BACK TO SDF DUCT #213N1103-46 IPC 21-51-15-01 SHOWS EFFECTIVE FOR A/C 423 HOWEVER IT DOES NOT MATCH THE DUCT THAT CAME OUT AND 2 OF THE PLUGS WONT REACH. P/N 213N1103-42 IS THE CORRECT CONFIGURATION OF THE PLUGS ON DUCT BUT NOT PER IPC.

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