Service difficulty report · Float Valve · Boeing 737924ER

Difficulty date
July 16, 2023
Submitted
July 19, 2023
Operation
Air carrier
Aircraft
N36476
Make and model
Boeing 737924ER
Aircraft serial
38703
Aircraft time
32,151 hours, 11,381 cycles
Part
Float Valve
Part number
UNKNOWN
Part serial
NA
Condition
Clogged
Location
Fwd Sill Drain
Stage of operation
CR
How discovered
O
Nature of condition
O
Precautionary procedure
A

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

What was found

FWD LAV NOW LEAKING TWICE THE RATE THEN EXPLAINED. VERY NASTY ODOR UPDATED MAA CODE FIX USING VENDOR MAA SCREEN PLEASE CONTACT TOMC BEFORE COMMENCING ANY WORK.MAC METER INITIATED FOR WITH VENDOR ID V929091 MAC RELATED WORK ORDER 000000003080619 AND PRTR CHAVEZ, ALEJANDRO (V929091) INSPECTED FWD LAV AND FWD GALLEYAREA. NO EVIDENCE OF LEAKS AT THIS TIME. INSPECTED E&E COMPARTMENT. NO EVIDENCE OF LEAKS OR WATER DAMAGE. ACFT IS CURRENTLY DRY. CANNOT DUPLICATE FAULT ON GROUND. REACTIVATED TOILET RINSE WATER AT FWD LAV BY TURNING WATER SUPPLY VALVE ON. VERIFIED NO LEAKS. VERIFIED NO LEAKS COMING FROM FWD LAV TOILET / SINK. FOUND L1 DOOR SILL DRAINS CLOGGED. UPON FURTHER INVESTIGATION, FOUND FWD SILL DRAIN FLOAT VALVE CLOGGED FULL OF MUD/DEBRIS. CLEANED FWD SILL DRAIN FLOAT VALVE IAW CMM 38-31-05 PG 401. FULLY REINSTALLED FWD SILL DRAIN VALVE AND TUBING AND VERIFIED OPERATION IAW AMM 38-31-06.