# SDR CKSA98557

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 8, 1998
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N712CK](https://openairdocs.org/aircraft/N712CK), registered now
- Make and model: Boeing 747-2B4B
- Registry model: [Boeing 747-2B4B](https://openairdocs.org/model/boeing-747-2b4b) (OpenAirDocs)
- Aircraft serial: 21098
- System (JASC): [5310 · Fuselage Main, Structure](https://openairdocs.org/jasc/5310)
- Part: Structure
- Condition: Corroded
- Location: Bs 2180-2200
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CKSA98557

## Discrepancy

AT AND AROUND LT DUMP VALVE, FOUND WIDESPREAD LEVEL 2 CORROSION AFFECTING SKIN, STRINGER, SHEAR TIE, FRAME, RIB, DOUBLER, LOCATED AT ZONE 100, STA 2180-2200, STR44L, WL130, LBL40.  REPAIR IAW BOEING DOC CKF-AMD-121, CKF-AMD-152.  FOUND DURING ACCOMPLISHMENT OF C, D CHECK, CPCP WORK CARD ACCOMPLISHMENT.  WORK ORDER NUMBER MO280, CORROSION TASK CARD NUMBER C53-125-01-02.

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