# SDR CALA2026050415935

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 10, 2026
- Submitted: May 4, 2026
- Operation: Air carrier
- Aircraft: [N19136](https://openairdocs.org/aircraft/N19136), registered now
- Make and model: Boeing 757224
- Aircraft serial: 29285
- Aircraft time: 100,589 hours, 21,937 cycles
- System (JASC): [5710 · Wing Main, Frame Structure](https://openairdocs.org/jasc/5710)
- Part: Vent
- Condition: Cracked
- Location: Zone 600
- 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/CALA2026050415935

## Discrepancy

RIGHT WING INSPECTION OF LOWER WING SKIN AND ACCESS PANEL 643BB PERIPHERY - DISCOVERED CRACK AFT OF FUEL VENT DURING NDT INSPECTION OF LOWER WING SKIN ACCESS PANEL 643BB 10 INCH IN LENGTH. FUEL IS PRESENT AND FORMS A DROP OUT OF THE CRACK AT A SLOW RATE OF APPROXIMATELY ONE DROP PER MINUTE SEE PICTURE #3.QC PERFORMED EDDY CURRENT INSPECTION AND NOTED THAT THE CRACK EXTENDS THROUGH THE SKIN BEGINNING AT THE OPENING WHERE PANEL 643BB SITS (IMAGE 136A) AND EXTENDS ALL THE WAY TO THE RIVET WHERE IT STOPS (IMAGE 136B).  QC INSPECTED THE INTERIOR SKIN AND THE CRACK EXTENDS ALL THE WAY THROUGH THE INTERNAL SKIN AND ENDS AT THE STRINGER. (IMAGES 136C-136G) IMAGES ADDED IMAGES ADDED VISIBLE LENGTH OF CRACK FROM PANEL OPENING UP TO THE RIVET IS AROUND 11.5 INCHES. PERFORMED INTERNAL HIGH FREQUENCY EDDY CURRENT ON THE STRINGER 6R AND FOUND A CRACK MEASURING 8 INCHES IN LENGTH GOING TOWARDS OUTBOARD. QC348585 PANEL REMOVED ON RIGHT WING 643BB FOR MX ACCESS INSTALLING PANEL 643BB TEMPORARILY FOR OTHER MX ACTIONS. NO REPAIR PERFORMED. VERIFIED FUEL TANK CLEARED OF ANY DEBRIS, OK TO INSTALL ACCESS PANEL 643BB. INSTALLED PANEL 643BB REF AMM TASK 28-11-03-404-008. C/W IDT RIGHT WING ACCESS PANEL 643BB INSTALLATION FOR OTHER MX ACTIONS, NO REPAIR ON DAMAGED AREA.

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