# SDR CALA2026040115033

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 29, 2026
- Submitted: April 1, 2026
- Operation: Air carrier
- Aircraft: [N79279](https://openairdocs.org/aircraft/N79279), registered now
- Make and model: Boeing 737824
- Aircraft serial: 31597
- Aircraft time: 64,920 hours, 24,044 cycles
- System (JASC): [5330 · Fuselage Main, Plate/Skin](https://openairdocs.org/jasc/5330)
- Part: Skin
- Part number: 147A34004
- 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/CALA2026040115033

## Discrepancy

DENT OR POSSIBLE BLENDOUT ON LOWER SKIN AT APPROX BS 950,  STR 27L.   REMOVED INTERCOSTAL FASTENER ON FUSELAGE SKIN BS 937, 2 INCH INBD OF STR 27L. MEASURED PREVIOUS BLEND OUT TO SKIN AT 0.020" AT DEEPEST SPOT. BLEND IS APPROX 1" LONG BY 1" WIDE.  FOUND ADDITIONAL BLEND MARKS TO SKIN UNDER PAINT. REMOVED TWO ADDITIONAL RIVETS ONE  FWD AND ONE AFT OF DAMAGED RIVET/DEEP BLEND OUT. WORKED OUT SCRATCHES BY HAND. IAW SRM 51-40-02 AND 53-00-01-01-1A.  PERFORMED HFEC ON AFFECTED AREA PER 737 NDT PART 6, 51-00-00, PROCEDURE 23; AS WELL AS OPEN HOLE INSPECTION ON THREE REMOVED RIVETS PER NDT PART 6, 51-00-00, PROCEDURE 16. NO CRACK INDICATIONS NOTED. ALSO PERFORMED SKIN THICKNESS MEASUREMENTS ON AFFECTED AREA IAW NDT PART 4, 51-00-00, PROCEDURE 2 AFTER BLENDING.

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