# SDR S9K2003F00000

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 7, 2003
- Submitted: October 28, 2003
- Operation: Air carrier
- Aircraft: [N414CS](https://openairdocs.org/aircraft/N414CS), registered now
- Make and model: Cessna 414A
- Registry model: [Cessna 414A](https://openairdocs.org/model/cessna-414a) (OpenAirDocs)
- Aircraft serial: 414A0230
- Engine: Cont TSIO520NB
- Propeller: Hartzl HCC3YF2
- System (JASC): [5330 · Fuselage Main, Plate/Skin](https://openairdocs.org/jasc/5330)
- Part: Skin
- Part number: 103912
- Part serial: 910
- Condition: Debonded
- Location: Winglet
- Part time: 2,228 hours
- Component part number: 103912
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/S9K2003F00000

## Discrepancy

DURING A ROUTINE PHASE INSPECTION ON A CESSNA 414A WITH RAM WINGLETS, INSTALLED UNDER STC NR SA4943SW A 6 INCH CRACK WAS DISCOVERED IN THE BOND LINE WHERE THE BOTTOM WINGLET SKIN IS BONDED TO THE BOTTOM OF THE WINGLET MAIN SPAR, ON THE FORWARD AND AFT SIDE.  A .5 INCH CRACK ON THE OPPOSITE WINGLET IN THE SAME AREA WAS ALSO DISCOVERED.  THE CRACKS START AT THE WINGLET MAIN SPAR FITTING PN 1088-5 AND GO OUTBOARD.  THE CRACKS APPEAR TO BE CAUSED BY FATIGUE.  BOTH WINGLETS WERE REMOVED AND SENT TO THE MANUFACTURE FOR REPAIR.(K)

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