# SDR UIEA2021043001026

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 16, 2021
- Submitted: May 18, 2021
- Operation: Air carrier
- Aircraft: [N429MC](https://openairdocs.org/aircraft/N429MC), registered now
- Make and model: Boeing 747481
- Aircraft serial: 24833
- Aircraft time: 107,390 hours, 16,170 cycles
- System (JASC): [7800 · Engine Exhaust System](https://openairdocs.org/jasc/7800)
- Part: Duct
- Part number: 683L178G07
- Part serial: R647960
- Condition: Damaged
- Location: Nr 3 Engine
- 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/UIEA2021043001026

## Discrepancy

NO.3 ENG LH C-DUCT FITTING HOLE FOUND ELONGATED REF CMM 78-32-02 REPAIR 020. THE POD SUPPORT FWD BUSHING HOLE MEASURED 1.08" DIA, WHICH HAS EXCEEDES THE MAXIMUM REPAIREABLE LIMIT 0.875" DIA.(<P>THE POD SUPPORT FTG CAN NOT REPLACED AS HAECO DOES NOT HAVE CAPABILITY  TO DISASSEMBLE THE UPPER SIDEWALL ASSY FOR THE FITTING REPLACEMENT. THE WHOLE C-DUCT. L3 DUCT REPLACED AS PER AMM 78-31-01.</P>)

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