# SDR AALA20160730005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 30, 2016
- Submitted: August 2, 2016
- Operation: Air carrier
- Aircraft: N954U
- Make and model: Doug DC-9-82
- Registry model: [Doug DC-9-82](https://openairdocs.org/model/mcdonnell-douglas-dc-9-82) (OpenAirDocs)
- Aircraft serial: 49426
- Aircraft time: 79,046 hours, 43,125 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: B-Nut
- Condition: Loose
- Location: Hyd System
- Stage of operation: CR
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20160730005

## Discrepancy

DURING FLIGHT THE LEFT HYDRAULIC PRESSURE LOW LIGHT ILLUMINATED. TRANSFER PUMP WAS TURNED OFF. QUANTITY IN LEFT SYSTEM 3 QUARTS, PUMP PRESSURE WENT TO 3000 PSI FOR 5 SECONDS THEN DROPPED TO 1000 PSI. PUMP TURNED OFF.  EMERGENCY DECLARED.  LANDING UNEVENTFUL.  AIRCRAFT GROUNDED.  MAINTENANCE FOUND A LOOSE B-NUT ON THE LEFT THRUST REVERSER FILTERS MOUNT BLOCK. RETORQUED B-NUT IAW AMM 20-30-02. OPS AND LEAK CHECKED NORMAL.

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