Service difficulty report · Indicator · Boeing 757251

Difficulty date
April 22, 2026
Submitted
April 23, 2026
Operation
Air carrier
Aircraft
N544US
Make and model
Boeing 757251
Aircraft serial
26491
Aircraft time
90,907 hours, 30,186 cycles
Part
Indicator
Condition
Inoperative
Location
Zone 800
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

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

What was found

R2 KNUCKLE KNOCKER INOP. CLEANED AND REMOVED DEBRIS FROM 2R KNUCKLE KNOCKER. CYCLED ARMED LEVER SWITCH MULTIPLE TIMES. KNUCKLE KNOCKER OPS NORMAL IAW B757 AMM 25-66. (1557964) AIRCRAFT IS GROUNDED