SDR AALA202110184766

Service difficulty report · Check Valve · Boeing 777223

Difficulty date: October 15, 2021
Submitted: October 18, 2021
Operation: Air carrier
Aircraft: N753AN
Make and model: Boeing 777223
Aircraft serial: 30261
Aircraft time: 78,548 hours, 9,981 cycles
System (JASC): 3830 · Waste Disposal System
Part: Check Valve
Part number: 6065151
Condition: Faulty
Location: Zone 100 - Fuse
Stage of operation: CR
How discovered: V
Nature of condition: G
Precautionary procedure: A

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

What was found

AIRCRAFT WAS GROUNDED: MULTIPLE LAVATORIES INOPERATIVE, FLIGHT DIVERTED TO BOS. REPLACED 2EA VACUUM CHECK VALVES IAW AMM 38-32-07, 2EA BAROMETRIC SWITCHES IAW AMM 38-32-51-40, AND RELAY K38004 IAW SWPM 20-81-11, LEAK AND OPS CHECK GOOD (SEE ALSO AALA202110188983, AALA202110185635, AALA202110186042, AALA202110181869).