# SDR UIEA2026043000275

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 1, 2026
- Submitted: May 4, 2026
- Operation: Air carrier
- Aircraft: [N473MC](https://openairdocs.org/aircraft/N473MC), registered now
- Make and model: Boeing 747-45E
- Registry model: [Boeing 747-45E](https://openairdocs.org/model/boeing-747-45e) (OpenAirDocs)
- Aircraft serial: 27174
- Aircraft time: 123,230 hours, 22,273 cycles
- System (JASC): [5330 · Fuselage Main, Plate/Skin](https://openairdocs.org/jasc/5330)
- Part: Skin
- Condition: Damaged
- 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/UIEA2026043000275

## Discrepancy

LEFT LOWER FUSELAGE SKIN JUST AFT OF RADOME HAS LIGHTNING STRIKE.  REMOVED PAINT AT LIGHTNING STRIKE DAMAGED AREA IAW B747-400 AMM TASK 51-21-01-150-814. MECHANICALLY MEASURED LIGHTNING STRIKE AT LT FUSELAGE SKIN STA 176.5 1 INCH ABOVE STR 41L, ORIGINAL SKIN THICKNESS 0.056", D=0.012"X MAX 20% 0.011", FOUND TO BE OUT OF LIMITS IAW SRM 53-10-01-01-1 AND SRM 53-00-01-1A TABLE 11.  PERFORMED DRILL OUT 0.126" ON LIGHTNING STRIKE AT LT FUSELAGE SKIN STA 176.5 1 INCH ABOVE STR 41L IAW SRM 53-00-01-2R-9 REPAIR STEP 3.A. OK TO NDT FOR OPEN HOLE. HFEC OPEN HOLE INSP NDTM PT 6 51-00-00 PROC 16 (ASSET 18-2213 DUE 10-20-26), NO CRACKS NOTED AT 1EA OPEN HOLE. REPAIRED DAMAGE AND NO FURTHER DEFECTS NOTED.

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