Service difficulty report · Control Valve · Boeing 7378KN

Difficulty date
August 4, 2025
Submitted
August 7, 2025
Operation
Air carrier
Aircraft
N836SY
Make and model
Boeing 7378KN
Aircraft serial
40251
Aircraft time
46,566 hours, 18,909 cycles
Part
Control Valve
Condition
Locked
Location
Zone 400
Stage of operation
LD
How discovered
O
Nature of condition
G, J
Precautionary procedure
O

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

What was found

NUMBER 1 ENG UNRESPONSIVE AFTER TOUCH DOWN N1 STUCK AT 20% WITH NO CHANGE IN N1, N2, FF WITH THRUST LEVER INCREASE. REVERSER LIGHT YELLOW WITH INABILITY TO ENGAGE NR 1 REVERSER ON LANDING. TAKE OFF CONFIG LIGHT ILLUMINATES WITH THRUST LEVER INCREASE MX NOTIFIED. REMOVED LOCKING DEVICE FROM LT DIRECTIONAL CONTROL VALVE. MANUALLY STOWED THRUST REVERSER IAW AMM 78-31-00. PERFORMED EAU BITE IAW FIM 78-31 TASK 801, CLEARED STOW & DEPLOY FAULTS RAN THRUS REVERSER WITH NO DEFECTS. CREW PERFORMED ENGINE RUN, OPS CHECKS GOOD

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