# SDR CALA2014032000356

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 16, 2014
- Submitted: March 20, 2014
- Operation: Air carrier
- Aircraft: [N13720](https://openairdocs.org/aircraft/N13720), registered now
- Make and model: Boeing 737724
- Aircraft serial: 28939
- Aircraft time: 50,275 hours, 16,082 cycles
- System (JASC): [5311 · Fuselage Main, Frame](https://openairdocs.org/jasc/5311)
- Part: Frame
- Part number: 14311202
- Condition: Cracked
- Location: Fuselage
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2014032000356

## Discrepancy

CRACK WAS FOUND ON THE FRAME HOLES WHICH ATTACH THE BRACKET BETWEEN STRINGER 8L - STRINGER 9L, STATION 480 L=0.1INCH.  FABRICATED ANGLES IAW  EA 5310-04716 REV F STEP 9 FIG 3, MATERIAL FIG 3.  THE SIXED HOLE IAW EA 5310-04716 REV F STEP 9 FIG 3, 7075-TO CLAD AL SHEET. REFABRICATED ANGLES, DONE HFEC INSPECTION, NO CRACK.  HEAT TREAT ANGLES IAW EA 5310-04716 REV F STEP 9 FIG 3 & 7075-TO CLAD AL SHEET.  VERIFY HEAT TREAT REFABRICATED ANGLES PER INDICATION.  REMOVE THE DAMAGE IAW EA5310-04716 REV F STEP 9 FIG 3.  LOCATED & DRILLED HOLES ON REPAIR IAW 5310-04716 REV F STEP 9.  REINSTALLED REPAIR PARTS, APPLIED CIC AT REWORKED AREA IAW EA 5310-04716 REV F FIG 3.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.