# SDR ASAA2026070867650

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 8, 2026
- Submitted: July 29, 2026
- Operation: Air carrier
- Aircraft: [N278AK](https://openairdocs.org/aircraft/N278AK), registered now
- Make and model: Boeing 737-900ER
- Registry model: [Boeing 737-900ER](https://openairdocs.org/model/boeing-737-900er) (OpenAirDocs)
- Aircraft serial: 44113
- Aircraft time: 31,064 hours, 9,957 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Web
- Part number: 146A8123025
- 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/ASAA2026070867650

## Discrepancy

AFT PIT LOWER SILL WEB AT DOOR CUOUT IS CORRODED  GROUNDED - YES. REMOVED AND ISNTALLED NEW LOWER SILL WEB ON AFT PIT CUTOUT IAW B737-900 SRM 51-40-02-06-0 AND REMOVED DAMAGE ON SILL WEB MAX MAT LOSS 0.019" FOUND TO BE OUT LIITS IAW B737-900 SRM 53-60-15-1A-1.  W- 1.5" O= 0.050" R= 0.031" L= 2" D= 0.019"

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