# SDR CALA2026091519425

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 12, 2026
- Submitted: September 15, 2026
- Operation: Air carrier
- Aircraft: [N37555](https://openairdocs.org/aircraft/N37555), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 67182
- Aircraft time: 11,925 hours, 4,013 cycles
- System (JASC): [3830 · Waste Disposal System](https://openairdocs.org/jasc/3830)
- Part: Drain Valve
- Part number: SC4L5000451
- Condition: Leaking
- Location: Zone 900
- Stage of operation: NR
- How discovered: O
- Nature of condition: K
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026091519425

## Discrepancy

SUSPECTED LEAK NEAR AFT LAV ACCOMPLISHED STEP 1, IMMEDIATE CLEANUP REQUIRES STEP 2 IN DEPTH CLEAN UP WITHIN 7 DAYS UPON INSPECTION, FOUND MASSIVE WATER PUDDLE BETWEEN LAVS IN THE AFT. FOUND LEAK BEHIND TOILET SHROUD IN LAV D. LEAK COMING FROM DRAIN VALVE. SHUT OFF WATER SUPPLY, CLEANED WATER AND LOCKED LAV. TAKING AFT LAV D REF LP 3310650 FOR DETAILS AND RESOLUTION OF DISCREPANCY. THIS LOG PAGE IS JUST FOR THE IN DEPTH CLEANING. PIC ADDED EFFECTED AREA SPANS FROM ROW 38 TO THRESHOLD OF LAVATORY DOORS AND FROM LAV DOOR TO LAV DOOR LEFT TO RIGHT DID NOT CROSS THRESHHOLD INTO GALLEY TOMC APPROVED DIP FOR SPILL AFT CABIN BETWEEN LAVS NOT EXTENDING INT THE GALLEY AND UP TO ROW 38 WITH IMMEDIATE CLEANUP ACCOMPLISHED AND IN-DEPTH CLEANUP DUE WITHIN 7 DAYS IAW SECTION 2B ECRA 2011-01000 TOMC-APPROVAL FROM SC1ELBYC COMMENT TA   M&E: 42-9920-8-0019 S/N: 7555 LIMIT: TOMC APPROVED, QC REVIEWED COMPLIED WITH ECRA 2011-01000. SEC. 2B & 2C. CLEANED IMMEDIATE AREA AND INSPECTED BENEATH FLOOR BOARD IN AFFECTED AREA. NO WATER FOUND. TOMCQC REV PERFORMED

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