# SDR UIEA2016020600077

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 5, 2015
- Submitted: February 9, 2016
- Operation: Air carrier
- Aircraft: [N408MC](https://openairdocs.org/aircraft/N408MC), registered now
- Make and model: Boeing 747-47UF
- Registry model: [Boeing 747-47UF](https://openairdocs.org/model/boeing-747-47uf) (OpenAirDocs)
- Aircraft serial: 29261
- Aircraft time: 68,986 hours, 11,300 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Hinge
- Part number: 65B4001028
- Part serial: TLS18516
- Condition: Cracked
- Location: Ram Air Door
- Stage of operation: CL
- How discovered: O
- Nature of condition: E
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2016020600077

## Discrepancy

AIR RETURN, BANGING & VIBRATION FELT IN COCKPIT, ORIGINATING FROM LOWER FUSELAGE BENEATH STATION 1000.  POST FLIGHT REVEALED DAMAGE TO NR 3 PACK INLET DOOR.  CHECKED & FOUND THE PACK NR 3 RAM AIR INLET DOOR HINGE CRACKED.  REPLACED THE RAM AIR INLET DOOR IAW AMM 21-62-02.  REPLACED THE RAM AIR INLET DOOR ACTUATOR IAW AMM 21-62-03.  PERFORMED THE PTC A & B GND TEST FOR THE NR 3 PACK RAM AIR INLET DOOR & ACTUATOR & ALL TESTED SATISFACTORY.

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