SDR AALA201908229007

Service difficulty report · Manifold · Boeing 737823

Difficulty date: August 21, 2019
Submitted: August 23, 2019
Operation: Air carrier
Aircraft: N800NN
Make and model: Boeing 737823
Aircraft serial: 29564
Aircraft time: 32,246 hours, 12,904 cycles
System (JASC): 2820 · Aircraft Fuel Distribution System
Part: Manifold
Part number: 26701507
Part serial: 6348
Condition: Contaminated
Location: Fuel System
Stage of operation: DE
How discovered: O
Nature of condition: C, J
Precautionary procedure: O

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

What was found

AIRCRAFT WAS GROUNDED: CENTER TANK FUEL NEVER GOT BELOW 390. BOTH CENTER TANK FUEL PUMP LIGHTS ON IN DESCENT WITH CENTER FUEL PUMPS OFF. FUEL TRANSFERED BACK INTO THE CENTER TANK. MAINTENANCE REPORTS DURING TROUBLESHOOTING A CENTER FUEL TANK ENTRY WAS ACCOMPLISHED, FOUND DEBRIS FIELD FROM FAILED CHECK VALVE IN LEFT AFT AND FWD RT TANK ELEMENTS. REMOVED ALL DEBRIS. REPLACED REFUELING MANIFOLD IAW AMM 28-21-21. OPS & LEAK CHECKED GOOD.