# SDR CA190731014

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 29, 2019
- Submitted: August 17, 2020
- Operation: General aviation
- Make and model: Bombdr DHC8400
- Aircraft time: 20,045 hours
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Check Valve
- Part number: 6617305
- Condition: Leaking
- Location: Nr 1 Nac Hyd Sys
- Stage of operation: DE
- 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/CA190731014

## Discrepancy

(CAN) FLIGHT CREW REPORTED THAT ON DECENT THROUGH 12000` THE #1 HYDRAULIC QUANTITY DROPPED TO ZERO AND THE #1 HYDRAULIC ISO LIGHT ILLUMINATED. CREW DECLARED AN EMERGENCY AND CARRIED OUT A FLAPLESS LANDING. MAINTENANCE TROUBLESHOOTING IDENTIFIED A LEAK IN THE HYDRAULIC CASE DRAIN LINE LOCATED IN THE LEFT HAND NACELLE. THE LINE WAS REPAIRED WITH A PERMASWAGE IN ACCORDANCE WITH AMM 20-20-21. AIRCRAFT RETURNED TO SERVICE. (TC# 20190731014)

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