# SDR UIEA200400108

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 2, 2004
- Submitted: June 30, 2004
- Operation: Air carrier
- Aircraft: [N808MC](https://openairdocs.org/aircraft/N808MC), registered now
- Make and model: Boeing 747 212B
- Registry model: [Boeing 747 212B](https://openairdocs.org/model/boeing-747-212b) (OpenAirDocs)
- Aircraft serial: 21048
- Engine: Ge CF650E2
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Precooler
- Condition: Cracked
- Location: Nr 3 Pylon
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA200400108

## Discrepancy

(D) CHECK, DURING MAINT INSP, DAMAGE WAS FOUND ON RT SIDE OF NR 3 PYLON STRUCTURE ASSY.  CRACK DAMAGE WAS AT PRE-COOLER EXHAUST CUTOUT LOWER AFT CORNER AT NAC STA 248.  INNER SKIN DOUBLER WAS TRIMMED, AT GRILL ATTACHED HOLE TO REMOVE CRACK DAMAGE.  INNER SKIN DOUBLER TRIMMED EDGE, EXPOSED WINDOW STRAP SURFACE, ALONG WITH FASTENER HOLES, WERE HFEC INSPECTED TO ENSURE ABSENCE OF ANY CRACK OR OTHER DAMAGE.  NR 3 STIFFENER WAS REINFORCED WITH NEW STEEL LOWER REPAIR ANGLE FROM NAC STA .235 TO 254.  RIB INSTALLATION AT NAC STA 248 WAS MODIFIED TO ACCOMMODATE NEW STEEL REPAIR ANGLES INSTALLATION ON NR 3 STIFFENER.  ALUMINUM FILLER, FOR TRIMMED AREA OF INNER SKIN DOUBLER, WAS INSTALLED USING EXISTING NUT PLATE RIVETS.

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