# SDR IPXA2018030927278

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 9, 2018
- Submitted: March 9, 2018
- Operation: Air carrier
- Aircraft: [N582UP](https://openairdocs.org/aircraft/N582UP), registered now
- Make and model: Boeing 747-4R7F
- Registry model: [Boeing 747-4R7F](https://openairdocs.org/model/boeing-747-4r7f) (OpenAirDocs)
- Aircraft serial: 29053
- Aircraft time: 94,016 hours, 16,467 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Hydraulic Line
- Condition: Punctured
- Location: Flap Drive Unit
- Stage of operation: NR
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2018030927278

## Discrepancy

EMERGENCY DECLARED FOR A  HYD QTY LOW 1,  FOLLOWED BY HYD PRESSURE ON NR 1 ENGINE,  FOLLOWED BY HYD PRESSURE SYSTEM 1.   EICAS MESSAGES APPEARED.   ALTERNATE GEAR EXTENTION REQUIRED AS WELL AS LOSS OF NOSE GEAR STEERING.  CHECKS FOUND THE RETURN LINE OF OTBD FLAP DRIVE UNIT PUNCTURED,  REPAIRED IAW AMM 20-11-05, LEAK CHECKED SATISFACTORY.

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