# SDR ASAA2022091140108

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 11, 2022
- Submitted: October 3, 2022
- Operation: Air carrier
- Aircraft: N306AS
- Make and model: Boeing 737990
- Aircraft serial: 30014
- Aircraft time: 69,503 hours, 27,931 cycles
- System (JASC): [5330 · Fuselage Main, Plate/Skin](https://openairdocs.org/jasc/5330)
- Part: Skin
- Part number: 147A31103
- Condition: Corroded
- 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/ASAA2022091140108

## Discrepancy

FUSELAGE SKIN AROUND VACUUM LAV EXHAUST VENT AT FS917 IS CORRODED. GROUNDED - YES. DAMAGE FOUND TO BE OUT OF LIMITS CUT OUT DAMAGE AND REPAIRED SKIN IAW B737-900 SRM 53-70-01-2R-3 THIS IS A CAT B REPAIR WITH AN INSPECTION THRESHOLD OF 77,931 TOTAL FLIGHT CYCLES AND 5,000 CYCLE INTERVAL W=2 O=.125 R=.097 L=3 D=.028.

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