# SDR AALA20170206012

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 4, 2017
- Submitted: February 6, 2017
- Operation: Air carrier
- Aircraft: N381AN
- Make and model: Boeing 767323
- Aircraft serial: 25450
- Aircraft time: 95,518 hours, 15,224 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: O-Ring
- Condition: Cut
- Location: Hyd System
- Stage of operation: NR
- How discovered: 9
- Nature of condition: K
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20170206012

## Discrepancy

DURING FLIGHT HYDRAULIC SYSTEM A FLUID QUANTITY LOSS WAS OBSERVED. AIRCRAFT WAS GROUNDED. EMERGENCY DECLARED.  MAINTENANCE FOUND A CUT O-RING UNDER THE A SYSTEM ALTERNATION CURRENT MOTOR PUMP PRESSURE AND CASE DRAIN FILTER MODULE DIFFERENTIAL PRESSURE INDICATOR PLUG. REMOVED AND REPLACED O-RING IAW AMM 20-10-19. LEAK AND OPERATIONAL CHECK NORMAL.

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