Service difficulty report · Actuator · Boeing 7377H4

Difficulty date
February 14, 2026
Submitted
February 17, 2026
Operation
Air carrier
Aircraft
N478WN
Make and model
Boeing 7377H4
Aircraft serial
33989
Aircraft time
70,848 hours, 42,461 cycles
Part
Actuator
Condition
Failed
Location
Speed Brake
Stage of operation
LD
How discovered
O
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

SPEED BRAKES FAILED TO DEPLOY ON LANDING SPEED BRAKES FAILED TO DEPLOY ON LANDING. NH30. R & R AUTO SPEED BRAKE ACTUATOR IAW AMM 27-62-31 AND AUTO SPEED BRAKE MODULE REF. AMM 27-62-35. OPS CHECK GOOD AT THIS TIME. THIS CLEARS MEL.

More about the Boeing 737-7H4