# SDR CALA2026090219190

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 31, 2026
- Submitted: September 2, 2026
- Operation: Air carrier
- Aircraft: [N796UA](https://openairdocs.org/aircraft/N796UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26931
- Aircraft time: 115,899 hours, 15,125 cycles
- Engine: Pwa PW4090
- System (JASC): [3830 · Waste Disposal System](https://openairdocs.org/jasc/3830)
- Part: Waste Tank
- Part number: 01652007
- Part serial: 0197191
- Condition: Failed
- Location: Zone 900
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026090219190

## Discrepancy

TOILET FLUSH SYS INOP.  LAV 2R & LAV 4L.  INDICATOR SAYS LAV TANKS FULL.  OPENED AFT CARGO, CHKD LOGIC CONTROL MODULE OF WASTE TANK 3 & FOUND WASTE TANK IMPLODED.  WASTE TANK EMPTY.  COMPLIED WITH ECRA 3832-01214.  PERFORMED VISUAL INSP WITH NO FURTHER FINDINGS.  COUPLINGS & LINES TO TANK 1 SERVICEABLE & UNDAMAGED. TANK 3 ISOLATED & PLUG INSTALLED IN LIEU OF FLEXIBLE COUPLING COMMON TO TANK 2.  ALL OPENINGS OF TANK. SEALED WITH SPEEDTAPE. BLANKING AT TANK 2.  REMOVED AFT WASTE TANK IAW AMM 38-32-11-400-801. INSTALLED AFT WASTE TANK UP TO STEPS H.16, SUBTASK 38-32-11-420-014 IAW AMM 38-32-11-400-801.  INSTALLED CABLE ASSY & ACCOMP WASTE TANK INSTALLATION TEST.  OPS CHKD GOOD IAW AMM 38-32-11.  INSTALLED BRACKET ASSY FOR CAPILLARY TUBE ONTO WASTE TANK IAW AMM 38-21-11.

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