SDR ASAA2023100245406

Service difficulty report · Spring · Boeing 737990ER

Difficulty date: October 2, 2023
Submitted: October 3, 2023
Operation: Air carrier
Aircraft: N459AS
Make and model: Boeing 737990ER
Aircraft serial: 36352
Aircraft time: 35,637 hours, 11,174 cycles
System (JASC): 2820 · Aircraft Fuel Distribution System
Part: Spring
Condition: Broken
Location: Fuel Valve
Stage of operation: IN
How discovered: O
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

WHILE ACCOMPLISHING OK TO INSTALL FOR PANEL 532AB, FOUND BROKEN SPRING ON PRIMER CHECK VALVE FLAPPER ASSEMBLY. REF AIPC 28-20-51-01A ITEM 110. GROUNDED - YES. VALVE ASSY WAS REPLACED AS FOLLOWS: REMOVED 3 NUTS AND BOLTS, INSTALLED NEW VALVE ASSY, REINSTALLED NUTS / BOLTS AND TORQUED TO STANDARD TORQUE VALUE, REF AMM 20-50-11. VALVE INSTALLED WITH NEW PACKING.