# SDR UIEA2011060300315

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 3, 2011
- Submitted: June 16, 2011
- Operation: Air carrier
- Aircraft: [N522MC](https://openairdocs.org/aircraft/N522MC), registered now
- Make and model: Boeing 747-2D7B
- Registry model: [Boeing 747-2D7B](https://openairdocs.org/model/boeing-747-2d7b) (OpenAirDocs)
- Aircraft serial: 21783
- Aircraft time: 108,674 hours, 21,759 cycles
- System (JASC): [5310 · Fuselage Main, Structure](https://openairdocs.org/jasc/5310)
- Part: Tension Tie
- Condition: Damaged
- Location: Bs 840
- 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/UIEA2011060300315

## Discrepancy

DAMAGE WAS DISCOVERED DURING INSPECTION IAW EO 4753B328 - SB 747-53A2502 (ASSOCIATED WITH AD 2006-01-07) AT THE C4 CHECK. IN ADDITION TO THE SHORT EDGE MARGIN ON THE TENSION TIE, THE FRAME AND FRAME DOUBLER FASTENER HOLES HAVE BEEN PREVIOUSLY OVERSIZED IAW SB 747-53A2502 AND ARE CURRENTLY OUTSIDE THE SB ACCEPTABLE LIMITS. (THE ACTION REQUIRED TO CLOSE THE NRC WAS TO TRIM THE FORWARD TENSION TIE CHANNEL AND SPLICE IN A NEW SECTION IAW MULTIPLE OPERATOR MESSAGE 1-894152791-4, FABRICATE A REPLACEMENT TENSION TIE STEEL PLATE LARGE ENOUGH TO REMENDY THE SHORT EDGE MARGIN, REPLACE THE FRAME DOUBLER, AND INSTALL A FREEZE PLUG IN THE OVERSIZED FRAME HOLE IAW MULTIPLE OPERATOR MESSAGE 1-894152799-1.)

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