# SDR IPXA2B71958

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 7, 2012
- Submitted: March 2, 2012
- Operation: Air carrier
- Aircraft: [N581UP](https://openairdocs.org/aircraft/N581UP), registered now
- Make and model: Boeing 747-4R7F
- Registry model: [Boeing 747-4R7F](https://openairdocs.org/model/boeing-747-4r7f) (OpenAirDocs)
- Aircraft serial: 25866
- Aircraft time: 87,516 hours, 15,121 cycles
- System (JASC): [5347 · Fuselage, Seat/Cargo Attach Fittings](https://openairdocs.org/jasc/5347)
- Part: Seat Track
- Part number: 65B1602634
- Condition: Corroded
- Location: Bs 1145-1158
- 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/IPXA2B71958

## Discrepancy

INSPECTION TYPE: D, MAIN DECK BS 1145 TO 1158, RBL 11 SEAT TRACK OTBD FLANGE FOUND CORROSION.  REPAIRED IAW HX RS R-53-45-37310 REV A & EO B747-5310-46129-A, ORIG MATL'S BAC1520-1873-7075T6511 & FLANGE THICKNESS 0.12", CORRODED.  BLENDED D=0.077", W=1", L=2.5"  (2 LOCATIONS), FINAL CUTOUT SIZE'S 1.1" X 3.25" AT FWD SIDE& 1.1" X 3.625" AT AFT SIDE, CLASSIFIED AS A MAJOR REPAIR WITH MATL 7075T6-0125IN AS REPAIR STRAP, REPAIR SIZE IS 25" X 1.25".

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