# SDR CALA2023063002094

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 29, 2023
- Submitted: June 30, 2023
- Operation: Air carrier
- Aircraft: [N87507](https://openairdocs.org/aircraft/N87507), registered now
- Make and model: Boeing 737824
- Aircraft serial: 31637
- Aircraft time: 50,349 hours, 17,552 cycles
- System (JASC): [5711 · Wing Spar](https://openairdocs.org/jasc/5711)
- Part: Spar
- Part number: 111A11111
- Condition: Cracked
- Location: Lbl31.83 - 40.0
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2023063002094

## Discrepancy

CRACK INDICATION, CENTER WING REAR SPAR OF THE VERTICAL PRESSURE WEB BETWEEN LBL 31.83 AND 40.00.  MARKED.  TRANSCRIBED FROM HAEC O GSO NR 9282305. ACCOMPLISHED REPAIR IAW B737-800 SRM 57-10-10-2R-3 REPAIR ALTERN ATE 1.  REF HAECO GSO MECH V896606 OF SRM 57-10-10-2R-3, THE THRESHOLD IS 56000 FLIGHT CYCLES AFTE FROM THE AFT SIDE, PART [2] FILLER NOT COMMON TO THE FORWARD SID FLANGE OF THE LWR ATTACH ANGLE FROM THE FWD SIDE (ARROW 6) INSTALLATION AND AT AN INTERVAL OF 36000 FLIGHT CYCLES. PART [2] R REPAIR INSTALLATION. INSPECTION METHOD IS HFEC TO INITIAL WEB E (ARROW 2). PART [1] DOUBLER FROM THE FWD SIDE (ARROW4). HORIZ FILLER COMMON TO THE PART (1) ACCOMPLISHED REPAIR IAW SRM 57-10-10-2R-3 REPAIR 3, ALTERNATIVE 1. THIS REPAIR IS A CATEGORY B REPAIR. PER TABLE 204 AND FIG 207 TOMC APPROVED DIP TO ACCOMPLISH HFEC AND LFEC AT 56,000 FLT TOMC-APPROVAL FROM SC1ELBYC COMMENT CYCLES AFTER REPAIR INSTALLATION AND ACCOMPLISH REPEAT INSPECTION AEVERY 36,000 FLT CYCLES AFTER INITIAL INSPECTION ACCOMPLISHED REF SRM 57-10-10-2R-3 TABLE 204 IAW 737 NDT PART 6, 51-00-00, PROCEDURE 4 OR 737 NDT PART 6, DOUBLER FROM THE FWD SIDE (ARROW 3) IAW 737 NDT PART 6, REVIEWED 51-00-00, PROCEDURE 23. AFTER THRESHOLD OF 56000 CYCLES, 51-00-26. THIS INSPECTION WILL REQUIRE FILLET SEALANT REMOVAL, INTERVALS OF 36000 FLIGHT CYCLES IS REQUIRED. LFEC INSPECTION IS AN INSPECTION ALONG UPPER EDGE OF THE INITIAL WEB AND/OR PART REQUIRED AT A THRESHOLD OF 56000 FLIGHT CYCLES AFTER REPAIR [1] DOUBLER AND REAPPL

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