# SDR ASAA2025032157442

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 21, 2025
- Submitted: April 22, 2025
- Operation: Air carrier
- Aircraft: [N457AS](https://openairdocs.org/aircraft/N457AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36355
- Aircraft time: 37,855 hours, 11,929 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Channel
- Part number: 147A5660U3
- 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/ASAA2025032157442

## Discrepancy

CORROSION ON CHANNEL BETWEEN STATIONS 947.5 AND 967 ABOUT 24 INCHES INBOARD OF L2 DOOR. GROUNDED - YES. REMOVED DAMAGE & CHECKED LIMITS ORI MAT .180,REMOVED .027,REMAINING MAT .157,FOUND TO BE OUT OF LIMITS IAW B737-900ER SRM 53-70-51-1A-1.REMOVED AND REPLACED INTERCOSTAL BETWEEN STA 947 TO 967LBL 24 IAW B737-900ER SRM 51-40-02. BAC DWG# 147A5650 REV A

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