# SDR UIEA01044

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 21, 2001
- Submitted: May 17, 2001
- Operation: Air carrier
- Aircraft: [N509MC](https://openairdocs.org/aircraft/N509MC), registered now
- Make and model: Boeing 747230B
- Aircraft serial: 21221
- System (JASC): [5312 · Fuselage Main, Bulkhead](https://openairdocs.org/jasc/5312)
- Part: Bulkhead
- Part number: 65B02534
- Condition: Cracked
- Location: Fuselage
- Part time: 100,709 hours
- 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/UIEA01044

## Discrepancy

DURING INSPECTION OF AFT PRESSURE BULKHEAD BS 2360 PER SB 747-53A2275 FOUND CRACK .75 INCH LONG ORIGINATING FROM FASTENER HOLE FROM WEB TO Y-RING LAP JOINT BETWEEN STRINGER 24 AND 25R.  CUT OUT CRACKED AREA.  FABRICATED FILLER AND DOUBLER.  OVERSIZED FASTENER HOLES AS NEEDED.  INSTALLED FILLER AND DOUBLER PER STANDARD PRACTICES.  (M)

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