# SDR SWAA2023030693633

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 20, 2023
- Submitted: March 6, 2023
- Operation: Air carrier
- Aircraft: [N7885A](https://openairdocs.org/aircraft/N7885A), registered now
- Make and model: Boeing 737-76N
- Registry model: [Boeing 737-76N](https://openairdocs.org/model/boeing-737-76n) (OpenAirDocs)
- Aircraft serial: 33379
- Aircraft time: 62,518 hours, 31,343 cycles
- System (JASC): [5720 · Wing Miscellaneous Structure](https://openairdocs.org/jasc/5720)
- Part: Spar
- Condition: Corroded
- Location: Zn 600 Right Win
- 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/SWAA2023030693633

## Discrepancy

CORROSION ON RIGHT WING FRONT SPAR AROUND BOOST PUMP UPPER BONDING JUMPER IFSS119. MARKED<[01] VERIFIED APLICABILITY SRM 57-20-10-1A-3 ALLOWABLE DAMAGE 3;[02] REMOVED CORROSION ON R/H WING FRONT SPAR AROUND BOOST PUMP UPPER BONDING JUMPER PER SRM 57-20-10-1A-3;[03] DO A FLOURESCENT PENETRANT INSPECTION OF REWORKED AREA;[04] VISUALLY INSPECTED THE REWORK AREA ON THE FRONT SPAR BOOST PUMP UPPER BONDING JUMPER POINT. NO CORROSION NOTED VISUALLY.;[05] PT INSPECTED AREA IAW SOPM 20-20-02. <BR>NO DEFECTS NOTED. <BR>EQUIP USED: <BR>-RADIOMETER ID: ATS2504-A; B; C CAL DUE: 05/23;[06] UT REQUEST AT REWORKED AREA TO VERIFY REMAINING THICKNESS; ORIGINAL THICKNESS 0.480 IAW SRM 57-20-10-1A-3; SEE GRID MAP ATTACHED 0.250' X 0.250';[07] ACCOMPLISHED UT THICKNESS INSPECTION IAW 737 NDTM PART 4 CHAPTER 51-00-00 PROCEDURE 2.<BR>REMAINING MINIMUM MATERIAL 0.286' SEE ATTACHED GRID.<BR><BR>EQUIPMENT USED: EPOCH 650 ID: ATS2342 CAL DUE: 07/2023;[08] PERFORMED FLAP PEEN AT REWORKED AREAS AT FRONT SPAR AROUND BOOST PUMP UPPER AND LOWER BONDING JUMPER IAW 57-20-10-1A-3<BR>FLAP PEEN KIT ID: ATS 2771 S/N 22181705 DUE: 07/2023.<BR>TACHOMETER ID: ATS 127 S/N: 1372941 DUE: 03/2023;[09] VERIFIED CORRECTIVE ACTION 8.;[10] VERIFIED THE MEASUREMENT TABLE.;[21] THE DAMAGE WAS REPAIRED PER 737-700 SRM 57-20-10; ALLOWABLE DAMAGE 3 AND EA 23-157-00357;

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