# SDR UALA2012090404966

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 3, 2012
- Submitted: September 8, 2012
- Operation: Air carrier
- Aircraft: [N197UA](https://openairdocs.org/aircraft/N197UA), registered now
- Make and model: Boeing 747422
- Aircraft serial: 26901
- Aircraft time: 61,155 hours, 7,209 cycles
- Engine: Pwa PW4056
- System (JASC): [5330 · Fuselage Main, Plate/Skin](https://openairdocs.org/jasc/5330)
- Part: Skin
- Condition: Corroded
- Location: Fuselage
- 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/UALA2012090404966

## Discrepancy

LEFT LAV TANK EXHAUST VENT CUTOUT SKIN IS CORRODED AND CRACKED APPROX .5 INCH LOWER EDGE.  GAINED ACCESS, REMOVED VENT NOZZLE ASSY, STARTED REMOVING INNER DOUBLER REF AVO 1408.  REMOVED DAMAGE, MANUFACTURED REPAIR PIECES, STARTED INSTALLATION.  REPAIRED LEFT LAV TANK EXHAUST VENT CUTOUT PER ECRA NR 5300-01433.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.