# SDR FDEA202102240441

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 24, 2021
- Submitted: February 25, 2021
- Operation: Air carrier
- Aircraft: [N316FE](https://openairdocs.org/aircraft/N316FE), registered now
- Make and model: Doug MD-10-30F
- Registry model: [Doug MD-10-30F](https://openairdocs.org/model/mcdonnell-douglas-md-10-30f) (OpenAirDocs)
- Aircraft serial: 48314
- Aircraft time: 64,446 hours, 23,893 cycles
- Engine: Alidsg
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Line
- Condition: Leaking
- Location: Hyd System
- Stage of operation: CR
- 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/FDEA202102240441

## Discrepancy

PDIS  316     29-02  5970     23FEB21  MEM  FACT  U  "ENROUTE TO KMEM LEVEL 1 "HYD 3 ELEV OFF" ALERT  ILLUMINATED. HYD 3 WAS AT 4.3 AT THE TIME. HYD 3  CONTINUED TO DECREASE TO 3.0. GEAR EXTENDED W/GEAR  HANDLE AND FLAPS & SLATS DEPLOYED OKAY. MADE FLAPS  35/EXT LANDING KMEM RWY 10C. HYD 3 WENT TO 0.4 AT  GEAR EXTENSION WITH LEVEL 3 HYD FAIL ALERT.  (D.L.W.)"  SHGN 23FEB21 18:03   MEM U  ACFT RETRIEVED FROM RWY 18C AND TOWED TO GATE 826.  WILL TROUBLESHOOT AFTER OFFLOAD.   PRIMARY TRIM CONTROL VALVE. WITH SYSTEM 3 HYD SERVICED, OPERATED HORIZONTAL STABILIZER TRIM REF AMM 27-40-00-2. NOTED LARGE LEAK FROM HYDRAULIC LINE TO UPPER PRIMARY TRIM CONTROL VALVE P/N AJK7004-759. FOUND FITTING 'B'-NUT LESS THAN FINGER TIGHT (ALMOST COMPLETELY DISCONNECTED).  DISCONNECTED LINE, INSPECTED 'B'-NUT AS WELL AS MATING SURFACE ON VALVE UNION. NO DISCREPENCIES WERE FOUND. RECONNECTED & RE-TORQUED LINE IAW AMM 20-50-01-2. RE-PREFORMED HORIZ STAB OPS CHECKS REF AMM 27-40-00-2.NO LEAKS NOTED. CLOSED MAIN GEAR DOORS. AIRCRAFT O.K. FOR SERVICE.

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