# SDR CALA2023091102753

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 10, 2023
- Submitted: September 11, 2023
- Operation: Air carrier
- Aircraft: [N78509](https://openairdocs.org/aircraft/N78509), registered now
- Make and model: Boeing 737824
- Aircraft serial: 31638
- Aircraft time: 50,177 hours, 17,614 cycles
- System (JASC): [5312 · Fuselage Main, Bulkhead](https://openairdocs.org/jasc/5312)
- Part: Bulkhead
- Part number: 11A2101
- Condition: Cracked
- Location: Lh Wheel Well
- 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/CALA2023091102753

## Discrepancy

LH WHEEL WELL, UPPER FWD BULKHEAD AT APPROX LBL42 CRACKED. REF TO PEMCO NR 14093.0059 P 5. REPAIR REQUIRES HFEC (REF SRM 57-10-10-2R-3 STEP & (B) FOR OF REPAIR, AND A THRESHOLD OF 36,000 FLIGHT CYCLES.  REF B737 N . HFEC REQUIREMENTS). AFTER 56,000 FLIGHT CYCLES OF INSTALLATION DT PART 6, 51-00-00 PROCEDURE 4 OR PART 6, 51-00-00 PROCEDURE 23 REMOVED DAMAGE AREA AND REPAIRED AT L/H WHEEL WELL, UPPER FWD BU LKHEAD CENTER WING. PER B737 SRM 57-10-10-2R-3 ALTERNATIVE 2 STE.

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