# SDR UIEA2011051700269

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 17, 2011
- Submitted: June 1, 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
- Engine: Ge CF650E2
- System (JASC): [7830 · Engine Thrust Reverser](https://openairdocs.org/jasc/7830)
- Part: Nozzle
- Condition: Cracked
- Location: Thrust Reverser
- 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/UIEA2011051700269

## Discrepancy

DURING A "C" CHECK OF AIRCRAFT, MX FOUND CRACKS ON THE NR 1 AND NR 2 ENGINE FIXED COWL EXHAUST NOZZLE FWD FLANGE CORE COWL SUPPORT ASSY (REF FIG 1 AND 2 ).  (THE CRACKS CAN BE REPAIRED IAW THE ENGINE SHOP MANUAL (ESM) TASK 78-33-05, REPAIR 78-33-05, REPAIR 002.  THE REPAIR CALLS FOR A POST WELD HEAT TREATMENT AND THERMAL SPRAY.  MX DOES NOT HAVE THE EQUIPMENT TO ACCOMPLISH THE REQUIRED HEAT TREATMENT AND THERMAL SPRAY.  DISPOSITION IS TO ACCOMPLISH THE ESM 78-33-05 REPAIR, EXCLUDING THE POST WELD HEAT TREATMENT AND THERMAL SPRAY, ACCOMPLISH DVI OF REPAIR AREA EVERY "2A" AND PERFORM THE PERMANENT REPAIR AT THE NEXT "C-CHECK.)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.