Service difficulty report · Actuator · Boeing 7379GPER

Difficulty date
September 9, 2026
Submitted
September 10, 2026
Operation
Air carrier
Aircraft
N934DZ
Make and model
Boeing 7379GPER
Aircraft serial
37289
Aircraft time
28,312 hours, 21,609 cycles
Part
Actuator
Part number
5416744
Part serial
12575
Condition
Faulted
Location
Ram Air
Part time
103,116 hours, 11,761 cycles
Stage of operation
CL
How discovered
O
Nature of condition
O
Precautionary procedure
B, G, I

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

What was found

DIV/PRES/DE- DIVERTED TO LAS DUE TO LOSS OF CABIN PRESSURE. FOUND CLAMP ON APU DUCT BOOT IN KEEL BEAM DAMAGED CAUSING LARGE LEAK. REPLACED CLAMP. REPLACED LT RAM AIR INLET ACTUATOR, FLEXIBLE SLEEVE AFT OF LT PACK CK VLV, SEALS BETWEEN LT CONDENSER AND REHEATER AND RT PACK FLOW CONTROL VALVE. PERFORMED LEAK CHECK AND PACK CONFIDENCE CHECKS, RESTOWED MASKS AND REPLACED O2 GENERATORS. ALL OPS AND LEAK CHECKS GOOD. (8779794) AIRCRAFT WAS GROUNDED.

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