# SDR SWAA2022051194852

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 15, 2022
- Submitted: May 11, 2022
- Operation: Air carrier
- Aircraft: [N7736A](https://openairdocs.org/aircraft/N7736A), registered now
- Make and model: Boeing 737-7BD
- Registry model: [Boeing 737-7BD](https://openairdocs.org/model/boeing-737-7bd) (OpenAirDocs)
- Aircraft serial: 35109
- Aircraft time: 50,096 hours, 25,534 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Strap
- Part number: 144A77132
- Condition: Corroded
- Location: Mid Cabin
- 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/SWAA2022051194852

## Discrepancy

CORROSION ON STRAP AT MID CABIN ABOVE PRESSURE DECK BS713 LBL63. MARKED / [01] REMOVED CORROSION ON STRAP AT MID CABIN ABOVE PRESSURE DECK BS 713 LBL 63 IAW SRM 51-10-02 ; ORIGINAL THICKNESS IS 0.071' IAW SRM 53-40-51-0I-2 DAMAGED AREA 2.0'X.7';[02] UPDATED STEP 1;[03] VERIFIED ALL VISUAL DAMAGE REMOVED ON STRAP AT MID CABIN ABOVE PRESSURE DECK BS 713 LBL 63.;[04] UT INSPECTED BLENDED AREAS IAW 737 NDTM PART 4 51-00-00 PROCEDURE 2; REMAINING THICKNESS IS 0.07' ADJACENT TO 0.071'. <BR>EQUIP USED: EPOCH 650 ID: ATS2031;[05] UPDATED MEASUREMENTS;[06] EVALUATED THE CORROSION DAMAGE ON STRAP AT MID CABIN ABOVE PRESSURE DECK BS 713 LBL 63 ; ORIGINAL THICKNESS IS 0.071' MATERIAL LOSS 2.0'X.7'X.001' REMAINING THICKNESS 0.070' ; FOUND TO BE OUT OF LIMITS DUE TO NO SRM ALLOWABLE LIMITS FOUND IAW SRM 51-10-02-0G-0;[07] VERIFIED DAMAGE OUT OF LIMITS DUE TO NO SRM ALLOWABLE LIMITS FOUND IAW SRM 51-10-02-0G-0.;[08] HFEC INSPECTED REWORKED AREA IAW 737 NDTM PART 6 51-00-00 PROCEDURE 23.<BR>NO CRACKS NOTED.<BR>EQUIP USED:<BR>-NORTEC 600 ID: ATS1465 CAL DUE: 08/22<BR><BR>HFEC INSPECTED OPEN HOLE IAW 737 NDTM PART 6 51-00-00 PROCEDURE 16. <BR>NO CRACKS NOTED. <BR>EQUIP USED: <BR>-NORTEC 600 ID: ATS1465 CAL DUE: 08/22 <BR>-MINIMITE ID: ATS1411 CAL DUE: 05/22;[09] COMPLETED ALL STEPS;[10] VERIFIED STEP 1;[11] VERIFIED ALL STEPS AND EA ACTIONS AND REPAIR COMPLETED. NO FURTHER ACTION REQUIRED.

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