# SDR RRXA991172

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 23, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N792FT
- Make and model: Doug DC-8-73F
- Registry model: [Doug DC-8-73F](https://openairdocs.org/model/douglas-dc-8-73f) (OpenAirDocs)
- Aircraft serial: 46046
- System (JASC): [2750 · Trailing Edge Flap Control System](https://openairdocs.org/jasc/2750)
- Part: O Ring
- Condition: Failed
- Location: Slot Contl Valve
- Stage of operation: AP
- Nature of condition: K, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/RRXA991172

## Discrepancy

AT TIME 14:13-Z ON BOTH HYD PUMPS WITH RES LOW PRESS LT ON.  AUX PUMP WOULD ONY BUILD UP TO 1000 PSI, QUANITY STAYED AT 3/4.  FLAPS SHOWED A SPLIT WHEN SYSTEM PRESSURIZED IN THE BYPASS POSS.  FOUND BLOWN O-RING ON SLOT CONTROL VALVE.  REPLACED O-RING ON SLOT CONTROL VALVE SERVICED HYD SYS AS REQUIRED PERFORMED ENG RUN ON NR 2 AND NR 3 ENG FOR OPS CK HYD PUMPS, PERFORMED FLT CONTROL CKS AND LEAKS CKS OF NEW O-RING, OPS CK GOOD ON ENG DRIVEN PUMPS, FLT CONTROL LEAKS CK GOOD.  NO LEAKS OR DEFECTS NOTED.

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