# SDR ASAA2024091352631

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 13, 2024
- Submitted: September 19, 2024
- Operation: Air carrier
- Aircraft: [N495AS](https://openairdocs.org/aircraft/N495AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41728
- Aircraft time: 32,074 hours, 9,856 cycles
- System (JASC): [5330 · Fuselage Main, Plate/Skin](https://openairdocs.org/jasc/5330)
- Part: Skin
- Part number: 143A3232
- Condition: Corroded
- Location: Zone 200
- 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/ASAA2024091352631

## Discrepancy

EXTERIOR FUSELAGE SKIN BS.360 TO 500E STR.0 HAS SIGNS OF CORROSION AROUND BELLY DRAINS (9EA.CIRCLED). GROUNDED - YES. REMOVED CORROSION FROM 9(EACH) LOCATIONS IAW B737-900 ER SRM 51-10-02, ORIG THICKNESS .063 IAW B737-900 ER SRM 53-30-01, LOWEST READINGS AT STA'S 500B AND 500E REMOVED .003 REMAINING MAT .060 FOUND TO BE IN LIMITS IAW B737-900 ER SRM 53-00-01. REINSTALLED DRAIN PLUGS IAW B737-900ER AMM 51-41-13. TOOL #T8927K CAL DUE 27/SEP/24. THIS IS A CAT B REPAIR REINSPECT REQUIRED 50,000 FLIGHT CYCLES FROM AIRPLANE DELIVERY PER B737-900ER SRM 53-30-01-1A-1 TABLE 103 SUBMITTED TO ENGINEERING FOR TRAX THIS CLOSES THE DEFECT.

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