# SDR CALA2022071101697

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 8, 2022
- Submitted: July 11, 2022
- Operation: Air carrier
- Aircraft: [N772UA](https://openairdocs.org/aircraft/N772UA), registered now
- Make and model: Boeing 777224
- Aircraft serial: 26930
- Aircraft time: 96,993 hours, 17,788 cycles
- System (JASC): [5300 · Fuselage Structure (General)](https://openairdocs.org/jasc/5300)
- Part: Skin
- Part number: 2024T30071INCLAD
- Condition: Corroded
- Location: Aft Vent Port
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2022071101697

## Discrepancy

FUS. LOWER SURFACE AFT VACUUM BLOWER EXHUST VENT PORT SURROUND FOUND CORROSION. WERE ZERO TIMED WHICH SETS THE INITIAL INSPECTION AT 30,000 INSPECTIONS AT 4,000 FLIGHT CYCLES THEREAFTER. FLIGHT CYCLES SINCE THE REPAIR WAS INSTALLED AND REPETITIVE THE SKIN WAS REPAIRED PER SRM 53-70-01-2R-1 REPAIR 1. THIS IS A CATEGORY B REPAIR REQUIRING REPEAT INSPECTIONS. FASTENER HOLES RII BY TA594.

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