Service difficulty report · Shutoff Valve · Boeing 74747UF

Difficulty date
June 19, 2021
Submitted
June 22, 2021
Operation
Air carrier
Aircraft
N477MC
Make and model
Boeing 74747UF
Aircraft serial
29255
Aircraft time
91,400 hours, 16,143 cycles
Part
Shutoff Valve
Part number
AV16E1305
Part serial
T17228C
Condition
Failed
Location
Rt Wing Hyd Sys
Stage of operation
CL
How discovered
O
Nature of condition
J
Precautionary procedure
J, A

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

What was found

FLT CONTROL VALVES CAUTION MESSAGE. REMOVED AND REPLACED FLIGHT CONTROL HYD SHUT-OFF MODULE, OPS CHECK OF ALL FLIGHT CONTROL SHUT OFF VALVES GOOD PER AMM 27-13-00 AND 27-23-00. REPLACED THE NR 1 WING HYD SHUT OFF VALVE PER AMM 27-13-01.

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