Service difficulty report · Valve · Boeing 74787UF

Difficulty date
January 6, 2026
Submitted
January 7, 2026
Operation
Air carrier
Aircraft
N851GT
Make and model
Boeing 74787UF
Aircraft serial
37565
Aircraft time
58,352 hours, 9,069 cycles
Part
Valve
Part number
4528A010001
Part serial
452800153
Condition
Defective
Location
Cockpit Air
Stage of operation
CR
How discovered
O
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

CABIN TEMP EXCESSIVE (38C) FOUND MAINT MSG 21304, FLIGHT DECK TRIM AIR VALVE DEFECTIVE. R & R F/D TRIM AIR VALVE AND OPS CHECK OK IAW AMM 21-61-10-401, AIPC 21-61-10-08 & FIM TASK 21-61-01-810-819.

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