# SDR SWAA2023070555116

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 1, 2023
- Submitted: July 5, 2023
- Operation: Air carrier
- Aircraft: [N962WN](https://openairdocs.org/aircraft/N962WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 36963
- Aircraft time: 38,452 hours, 23,554 cycles
- System (JASC): [5340 · Fuselage Main, Attach Fittings](https://openairdocs.org/jasc/5340)
- Part: Fitting
- Part number: UNKNOWN
- Condition: Corroded
- Location: Zn 100 Fus Lower
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2023070555116

## Discrepancy

CORROSION ON STRINGER END FITTING AT AREA AFT OF ACB BS1015 RBL4 WL189.<[01] EVALUATED EXFOLIATION CORROSION AT STRINGER END FITTING FOUND TO BE OUT OF LIMITS NO FOUND LIMITS ON SRM REPAIR BY REPLACEMENT OF THE PART PER SRM 51-10-02-0G-0 STEP 9;[02] REMOVED STRINGER END FITTING AT BS BS 1016 RBL 4 WL 189 STR-27 RH PER SRM 51-40-02-0G-0;[03] LOCATED AND DRILLED STRINGER END FITTING P/N 147A1116-124 LOT# 1529893-1 STR-27R BS 1016 WL 189 RBL 4 PER SRM 51-40-02-0G-0 AND DWG 147A0070<BR>OK TO INSTALL FITTING;[04] VERIFIED CORRECTIVE ACTION ITEM 3.<BR>OKAY TO INSTALL FITTING GIVEN.;[05] INSTALLED THE NEW STRINGER END FITTING P/N 147A1116-124 AT BS 1016 STR-27R; WL 189 RBL 4 AND TORQUED THE BOLT WITHIN THE REFERENCE IAW SRM 51-40-02-0G-0 AND DWG#147A0070 REV: B;[06] TOOLS USED TORQUE WRENCH 200 TO 1200 IN-LB ID:ATS2632; DUE:05/31/2024;[07] VERIFIED CORRECTIVE ACTION 1. VERIFIED MEASUREMENT TABLE EXCEPT ITEM 19.;[08] VERIFIED CORRECTIVE ACTIONS 5 AND 6;[09] UPDATED MEASUREMENT TABLE STEP 19;[10] APPLIED CUP SEALANT ON STRINGER END FITTING BOLTS BS 1016; RBL 4; WL 189; IAW AMM 51-31-00-390-805;[11] VERIFIED RII STEPS COMPLETE;[12] VERIFIED CORRECTIVE ACTION 9 AND 10<BR><BR>VERIFIED MEASUREMENT TABLE STEP 19

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