Service difficulty report · Outflow Valve · Boeing 7478F

Difficulty date
March 24, 2024
Submitted
March 25, 2024
Operation
Air carrier
Aircraft
N620UP
Make and model
Boeing 7478F
Aircraft serial
65787
Aircraft time
16,225 hours, 2,443 cycles
Part
Outflow Valve
Part number
UNKNOWN
Condition
Inoperative
Location
Cabin Pressure
Stage of operation
CR
How discovered
9
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

*EMERGENCY DECLARED* CLIMBING FL 280 TO FL 320, CAB ALT AND RATE TURNED AMBER. CMC READ OUT ACCOMPLISHED . FOUND CMC MESSAGE 21618 STORED IN CMC MEMORY. C/W IFIM 21-26-00-810-831 REV. 202401319B. CMC GROUND TEST OF FWD CARGO OVERBOARD VALVE ACCOMPLISHED IN ACCORDANCE WITH AMM 21-26-00-700-818-001 REV.44 FOUND SATISFACTORY. THIS CLOSES DMI . DMP REVERSED . PLACARD REMOVED.

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