# SDR SWAA2023062646842

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 8, 2023
- Submitted: June 26, 2023
- Operation: Air carrier
- Aircraft: [N429WN](https://openairdocs.org/aircraft/N429WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 33658
- Aircraft time: 66,602 hours, 39,316 cycles
- System (JASC): [5710 · Wing Main, Frame Structure](https://openairdocs.org/jasc/5710)
- Part: Angle
- Part number: UNKNOWN
- Condition: Corroded
- Location: Zn 500 Left Wing
- 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/SWAA2023062646842

## Discrepancy

L/W #1 TANK FWD BOOST PUMP UPPER BONDING JUMPER ATTACH POINT IS CORRODED ON FRONT SPAR<[01] SRM 57-20-10-1A-3 IS APPLICABLE TO THIS REPAIR.[05] REMOVED CORROSION ON LEFT WING FRONT SPAR AROUND BOOST BUMP UPPER BONDING JUMPER L= 4.6' W = 2.4' IAW SRM 57-20-10-1A-3 ALLOWABLE DAMAGE 3;[06] VERIFIED CORRECTIVE ACTION 5 DAMAGE REMOVED;[07] FLUORESCENT PENETRANT INSPECTION REQUEST AT REWORKED AREA TO ENSURE THAT THERE IS NOT OTHER DAMAGE IAW SRM 57-20-10-1A-3;[08] PT INSPECTED AREA IAW SOPM 20-20-02. <BR>CORROSION NOTED WITHIN BLENDED AREA. MARKED AREAS. <BR>EQUIP USED: <BR>-RADIOMETER ID: ATS2504-A; B; C CAL DUE: 05/23;[09] REMOVED CORROSION ON MARKED AREAS IAW SRM 57-20-10-1A-3;[10] FLUORESCENT PENETRANT INSPECTION REQUEST AT REWORKED AREA TO ENSURE THAT THERE IS NOT OTHER DAMAGE IAW SRM 57-20-10-1A-3;[12] PT INSPECTED AREA IAW SOPM 20-20-02.<BR>NO CORROSION NOTED.<BR>EQUIP USED:<BR>-RADIOMETER ID: ATS2504-A; B; C CAL DUE: 05/23;[13] UT REQUEST TO VERIFY THE REMAINING THICKNESS AT REWORKED AREA. ORIGINAL THICKNESS 0.480'; SEE GRID MAP. ATTACHED 0.250' X 0.250';[15] MEASUREMENT TABLE UPDATED.;[16] REMOVED WING LEADING EDGE DUCT; L/W INBORD LEADING EDGE SECTION PER AMM 36-13-01-000-803;

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