# SDR CA981125012

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 25, 1998
- Submitted: March 26, 2000
- Operation: Air carrier
- Make and model: Boeing 747-4F6
- Registry model: [Boeing 747-4F6](https://openairdocs.org/model/boeing-747-4f6) (OpenAirDocs)
- System (JASC): [3230 · Landing Gear Retraction/Extension System](https://openairdocs.org/jasc/3230)
- Part: Line
- Part number: 856916
- Condition: Leaking
- Location: Mlg
- Stage of operation: CL
- Nature of condition: K
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA981125012

## Discrepancy

(CAN) AIR TURN BACK DUE LANDING GEAR TILT AND MONITOR MESSAGES ON TAKEOFF.  REPLACED PSEU PER FIM TROUBLESHOOTING PROCEDURE.  SECOND TAKEOFF SAME PROBLEM RECURRED.  FOUND HYDRAULIC LEAK ON TILT ACTUATOR HOSE.  PROXIMITY SENSOR SWITCHES CHECKED, RESISTANCE ALL NORMAL.  THIRD TAKEOFF SAME PROBLEM.  AIRCRAFT GROUNDED.  PSEU REPLACED.  ALL SYSTEMS NOW NORMAL.  AIRCRAFT RETURNED TO SERVICE.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.