# SDR UPS03441523

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 17, 2003
- Submitted: November 5, 2003
- Operation: Air carrier
- Aircraft: N525UP
- Make and model: Boeing 747 212B
- Registry model: [Boeing 747 212B](https://openairdocs.org/model/boeing-747-212b) (OpenAirDocs)
- Aircraft serial: 21939
- Aircraft time: 80,338 hours, 15,279 cycles
- System (JASC): [1430 · Fasteners](https://openairdocs.org/jasc/1430)
- Part: Fastener
- Part number: BACB30US8K31
- Condition: Cracked
- Location: Fuselage
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS03441523

## Discrepancy

INSPECTION TYPE:C RIGHT BS 1480 BULKHEAD ONE EACH FASTENER NR 5 WAS CRACKED AT SPLICE FITTING AREA RUNNING AFT APPROX 0.065 INCH LONG.  RIGHT BS 1480 BULKHEAD SPLICE FTG NR 5 HOLE OVERSIZED TO 0.625 INCH & HFEC CONFIRMED NO CRACK.  REPAIR BUSHING FABRICATED & INSTALLED.  NR 5 BOLT REPLACED.  THE HOLE DIAMETER & EDGE/END MARGIN REF RS R53-43-35093 & EO B747-5310-19423A.  BS 1480 BULKHEAD SPLICE HOLES 1 TO 26 REQUIRED REPEAT INSPECTION EVERY 6000 FLT CYCS PER SB747-53A2390.

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