SDR DALA2019102806210

Service difficulty report · Actuator · Boeing 757232

Difficulty date: October 26, 2019
Submitted: October 28, 2019
Operation: Air carrier
Aircraft: N694DL
Make and model: Boeing 757232
Aircraft serial: 29726
Aircraft time: 71,365 hours, 26,895 cycles
System (JASC): 3220 · Nose/Tail Landing Gear
Part: Actuator
Condition: Malfunctioned
Location: Nlg Lock
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

SHIP 694 -GEAR- AFTER LANDING GEAR SELECTED DOWN WE RECEIVED GEAR DISAGREE LIGHT AND NO GEAR GREEN LIGHT. COMPLIED WITH QRH, HAD TO USE ALTERNATE GEAR EXTENSION TO GET A GREEN INDICATION ON THE NOSE GEAR. CORRECTIVE ACTION: R/R NOSE GEAR LOCK ACTUATOR AND BYPASS VALVE. FOUND NOSE GEAR SEQUENCE VALVE BYPASSING AND WORN BUSHING ON LINK ATTACHED TO SEQ VALVE. REPLACED VALVE AND LINK, PERFORMED NOSE GEAR LUBE AND OPERATIONAL TEST.