# SDR DALA2023070705500

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 2, 2023
- Submitted: July 7, 2023
- Operation: Air carrier
- Aircraft: [N139DU](https://openairdocs.org/aircraft/N139DU), registered now
- Make and model: Bombdr BD1001A10
- Aircraft serial: 50058
- Aircraft time: 6,952 hours, 3,244 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: CR
- How discovered: O
- Nature of condition: K
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2023070705500

## Discrepancy

HYD 1 LO QTY ADVISORY MEESAGE IN CRUISE. QTY WAS AT 12% DECREASED TO 4%. SUSPECTED LEAK. L REVERSER DID NOT DEPLOY ON LANDING. QTY DECREASED TO 0% ON TAXI IN. FOUND LT OUTBOARD ELEVATOR PCU INBOARD RETURN LINE LEAKING FROM SWEDGE. LINE REQUIRES REPLACEMENT. FOUND ALL 4 DPIS FOR #1 HYD SYSTEM IN(361396). R&R LH OUTBD HORIZONTAL STAB PCU RETURN LINE COIL ASSY. AND UNION PER A220 AMP 29-17. LEAK CHECK PERFORMED. NO LEAKS NOTED. RAN BOTH ENGINES AND DEPLOYED BOTH T/RS. OPS CHECK SATISFACTORY. A/C OK FOR SERVICE. SERVICED SYS 1 HYDRAULICS PER A220 AMP 12-10. (LP# 4651831)

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