SDR U2RA2023081100039

Service difficulty report · Cartridge · Boeing 747428

Difficulty date: August 8, 2023
Submitted: August 11, 2023
Operation: Air carrier
Aircraft: N952CA
Make and model: Boeing 747428
Aircraft serial: 25238
Aircraft time: 111,174 hours, 16,827 cycles
Engine: Ge CF680C2B1F
System (JASC): 5220 · Emergency Exits
Part: Cartridge
Part number: 12704421
Condition: Out Of Tolerance
Location: Zone 200
Component: Control Device
Component part number: 12701544
Stage of operation: IN
How discovered: O
Nature of condition: O
Precautionary procedure: K

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

What was found

DURING A-CHECK, ACCOMPLISHMENT OF SCHEDULED BOEING 747 TASK CARD 52-023-05-01, LEFT HAND UPPER DOOR, DISCHARGE CARTRIAGE FOR THE PRESSURE VESSEL M7039 FAILED THE RESISTANCE CHECK. WORK ACCOMPLISHED ON CRS# HAIY901D) HANGAR 901, PROJECT H1-23-05-00084, W/O 18590, NR 0049.