# SDR A8ZR20200318001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 7, 2020
- Submitted: March 18, 2020
- Operation: Air carrier
- Filed by: [Aersale Inc, repair station A8ZR580Y](https://openairdocs.org/faa-repair-station/A8ZR580Y/aersale-inc.md) (OpenAirDocs)
- Aircraft: N688XA
- Make and model: Boeing 7374Y0
- Aircraft serial: 24688
- Aircraft time: 51,461 hours, 31,269 cycles
- System (JASC): [5511 · Horizontal Stabilizer, Spar/Rib](https://openairdocs.org/jasc/5511)
- Part: Spar
- Condition: Corroded
- Location: Lt Horiz Stab
- 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/A8ZR20200318001

## Discrepancy

L/H HORIZONTAL STABILIZER AFT SPAR UPPER CHORD WAS FOUND TO HAVE CORROSION FROM STAB STA 169 TO 175 WITH DAMAGE MEASURES APPROXIMATELY 5.75"L X 0.75"L WITH A REMAINING THICKNESS OF 0.399". THE CORROSION DAMAGE HAS BEEN BLENDED OUT WITH THE FINAL BLEND OUT DIMENSIONS OF 5.75"L X .75"L X 0.399" MINIMUM REMAINING THICKNESS ON THE UPPER CHORD CENTER FACE. BLENDED DAMAGE TO THE UPPER CHORD AFT FLANGE ARE AS FOLLOWS  3.25"L X 1.0"W X 0.109" MINIMUM THICKNESS REMAINING. THIS REPAIR HAS FOUND TO BE STRUCTURALLY AND FUNCTIONALLY ACCEPTABLE. REF. STS EA 45-2020-026 REV A DTD 3/11/2020.

---
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.