# SDR UIEA201000109

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 11, 2009
- Submitted: April 1, 2010
- Operation: Air carrier
- Aircraft: [N492MC](https://openairdocs.org/aircraft/N492MC), registered now
- Make and model: Boeing 747-47UF
- Registry model: [Boeing 747-47UF](https://openairdocs.org/model/boeing-747-47uf) (OpenAirDocs)
- Aircraft serial: 29253
- Aircraft time: 44,866 hours, 8,348 cycles
- Engine: Ge CF680C2B1F
- System (JASC): [5753 · Trailing Edge Flaps](https://openairdocs.org/jasc/5753)
- Part: Flap Track
- Condition: Damaged
- 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/UIEA201000109

## Discrepancy

EO DOCUMENTS A MAJOR REPAIR. DURING D-CHECK, DAMAGE WAS FOUND TO 1 FASTENER COUNTERSUNK TO A DEEPER PROFILE (0.730"/100 DEGREE) BEYOND OHM REQUIREMENTS OF THE ORIGINAL DESIGN DIMENSION ( 0.645-0.675" /100 DEGREE REF FIG 1) OF NR 8 FLAP TRACK (PN:65B17061-116, SN:3219, POSTED SB747-27A2398).  PERMANENT REPAIR WAS PERFORMED AS DESCRIBED IN PART 1 WORK INSTRUCTIONS IAW THE OHM 27-51-81 FIG 410 REF SERVICE REQUEST 1-1247645633. ENGINEER'S REMARKS/SUBSTANTIATION: A) 747 OHM 27-51-81 FIGURE 410.  SERVICE REQUEST 1-1247645633.

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