# SDR ASAA2025051258099

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 12, 2025
- Submitted: May 22, 2025
- Operation: Air carrier
- Aircraft: [N978AK](https://openairdocs.org/aircraft/N978AK), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 43348
- Aircraft time: 7,454 hours, 2,089 cycles
- System (JASC): [5330 · Fuselage Main, Plate/Skin](https://openairdocs.org/jasc/5330)
- Part: Skin
- Part number: 143A3232
- Condition: Corroded
- Location: Zone 100
- 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/ASAA2025051258099

## Discrepancy

LOWER FUSELUGE SKIN JUST FWD OF STA 400, FWD SIDE OF DRAIN PLUG SKIN HAS CORROSION MARKED. GROUNDED - YES. REMOVED DAMAGE AND CHECKED LIMITS ORI MAT .080, REMOVED MAT .001, REMAINING .079 FOUND TO BE WITHIN LIMITS IAW B737-MAX9 SRM 53-30-01-01-1, SRM 53-00- 01-1A-5. ALODINE APPLICATION'S IAW B737-MAX9 SRM 51-20-01. APPLIED PRIMER IAW SOPM 20-41-02. APPLIED TOPCOAT IAW B737-MAX9 AMM 51-21-99/201. REMOVED AND REINSTALLED FUSELAGE DRAIN VALVE STA 400 BL0 IAW B737-MAX9 AMM 53-31-03-000-801, AMM 53-31-03-400-801.

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