# SDR DHL2005742530

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 15, 2005
- Submitted: November 4, 2005
- Operation: Air carrier
- Filed by: [AAR Aircraft Services, LLC, repair station DU4R141M](https://openairdocs.org/faa-repair-station/DU4R141M/aar-aircraft-services-llc.md) (OpenAirDocs)
- Aircraft: N742DH
- Make and model: Boeing 727225
- Aircraft serial: 21290
- System (JASC): [5714 · Wing, Center Box](https://openairdocs.org/jasc/5714)
- Part: Structure
- Condition: Corroded
- Location: Wing Box
- Stage of operation: IN
- How discovered: U
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DHL2005742530

## Discrepancy

CORROSION ON CENTER WING BOX APPROX 830 AT RBL 10.0.  MECHANICALLY REMOVED CORROSION ON CENTER WING BOX STA 830 RBL 10 IAW B727 SRM 51-10-6.  ULTRASONIC INSPECTION OF BLEND AREA IAW ASTM E797-95, HIGH READING .209" LOW READING .128" MATERIAL LOSS .082" FOUND OUT OF LIMITS IAW B727 SRM 57-30-1 FIG 4.  CUT OUT AREA OF SKIN FOR REPAIR IAW B727 SRM 57-30-3.  FABRICATED REPAIR DOUBLER AND FILLER FROM 7075-T6 .250, 12 X 12 INCHES, ALODINED, PRIMED IAW B727 SRM 57-30-3 FIG 1, INSTALLED REPAIR IAW B727 SRM 57-30-3 FIG 1, 51-10-1 PART 6, AND 51-30-2.

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