# SDR ASAA2023122347335

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 23, 2023
- Submitted: January 18, 2024
- Operation: Air carrier
- Aircraft: [N407AS](https://openairdocs.org/aircraft/N407AS), registered now
- Make and model: Boeing 737-900ER
- Registry model: [Boeing 737-900ER](https://openairdocs.org/model/boeing-737-900er) (OpenAirDocs)
- Aircraft serial: 41731
- Aircraft time: 41,970 hours, 13,088 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Transition Panel
- Part number: 143A7501192
- Part serial: UNK
- Condition: Corroded
- Location: Fwd Cargo
- 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/ASAA2023122347335

## Discrepancy

FWD PIT L/H TRANSITION PANEL STA 500K+6 TO 500L HAS CORROSION. GROUNDED - YES. REMOVED CORROSION FROM THE FWD PIT L/H TRANSITION PANEL AT STA 500K+6 TO 500L IAW B737-900ER SRM 53-00-53-1A-2.2.D ORIG THICKNESS IS .040 IAW B737-900ER SRM 53-30-53-01-2 TABLE 2. REMOVED .016" REMAINING THICKNESS IS .24" AND IS FOUND TO BE OUT OF LIMITS IAW B737-900ER SRM 53-00-53-1A-2.4.A.(2). REMOVED AND REPLACED FWD PIT L/H TRANSITION PANEL STA 500J+10 TO 500L IAW B737-900ER SRM 53-00-53-2R-5.

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