SDR 2000UALA00789

Service difficulty report · Fitting · Boeing 757222

Difficulty date: December 12, 2000
Submitted: January 17, 2001
Operation: Air carrier
Aircraft: N511UA
Make and model: Boeing 757222
Aircraft serial: 24799
Aircraft time: 35,837 hours, 13,466 cycles
Engine: Pwa PW2037
System (JASC): 3230 · Landing Gear Retraction/Extension System
Part: Fitting
Condition: Misinstalled
Location: Mlg
Stage of operation: LD
How discovered: O
Nature of condition: J
Precautionary procedure: L

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

What was found

UPON GEAR EXTENSION, NOSE GEAR DOWNLOCK GREEN LIGHT NOT ILLUMINATED. EICAS MESSAGE, GEAR DISAGREE STATUS, NOSE GEAR DISAGREE GEAR MONITOR. *S/D* REMOVED 1/8 DIAMETER PRESS FIT ZERK FITTING. FITTING WAS FOUND AT THE LOCK LINK OVERCENTER JOINT WHICH PREVENTED JOINT FROM GOING OVERCENTER AND PREVENTED DOWNLOCK SENSORS FROM READING TARGET NEAR. REMOVED ZERK AND OPS CHECKED NLG RETRACTION / EXTENSION. INSTALLED NEW ZERK AT INBOARD RETRACT ACTUATOR LUBE POINT WHERE OLD ZERK POPPED OUT.