SDR DALA2022070104598

Service difficulty report · Valve · Boeing 737

Difficulty date: June 30, 2022
Submitted: July 1, 2022
Operation: Air carrier
Aircraft: N928DU
Make and model: Boeing 737
Aircraft serial: 63537
Aircraft time: 8,723 hours, 3,527 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Valve
Condition: Damaged
Stage of operation: CL
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

SHIP 3928 -ATB- DUE TO ODOR IN CABIN. CORRECTIVE ACTION: INSPECTED CABIN EQUIPMENT, CARGO LIGHT BALLASTS AND GALLEY EQUIPMENT. PERFORMED ODI NO-GO PROCEDURES. REPLACED CABIN RECIRCULATION FILTERS. RAN ENGINES, APU AND BLEED SOURCES. NO TROUBLE INITIALLY FOUND. LATER PERFORMED FUNCTIONAL CHECK FLIGHT AND EXPERIENCED RUBBER/ELECTRICAL SMELL. MAINTENANCE FOUND DEBRIS IN NUMBER 1 ENGINE PRECOOLER. REPLACING NUMBER 1 ENGINE PRECOOLER CONTROL VALVE.