# SDR B4MR98003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 1, 1998
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N521DB](https://openairdocs.org/aircraft/N521DB), registered now
- Make and model: Boeing 727243
- Aircraft serial: 21266
- System (JASC): [5314 · Fuselage Main, Keel](https://openairdocs.org/jasc/5314)
- Part: Keel Beam
- Condition: Corroded
- Location: Bs 950-990
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/B4MR98003

## Discrepancy

DURING ACCOMPLISHMENT OF AD 92-12-03, FOUND CORROSION ON KEEL BEAM BETWEEN FS 950E TO FS 990.  REMOVED CORROSION IAW B727 SB 53-0179.  FOUND TO BE OUT OF LIMITS IAW B727 SRM 53-10-1.  INSTALLED REPAIR IAW SB 727 53-0179 N5C2 AND 727/E/2718 AIA SKETCH.  NON-ROUTINE TASK CARD NUMBER 14917.

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