# SDR CA020508012

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 1, 2002
- Submitted: May 31, 2002
- Operation: General aviation
- Make and model: Dhav DHC8*
- Engine: Pwa PW123
- Propeller: Hamstd 14SF23
- System (JASC): [3233 · Landing Gear Actuator](https://openairdocs.org/jasc/3233)
- Part: Actuator
- Part number: 8300101
- Condition: Contaminated
- Location: Mlg
- Stage of operation: AP
- How discovered: O
- Nature of condition: R, J
- Precautionary procedure: L
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA020508012

## Discrepancy

(CAN) DURING A FLT ON FINAL DESCENT LDG GEAR WAS SELECTED "DOWN". NLG FAILED TO EXTEND WITH BOTH DOOR & UNSAFE LIGHT ILLUMINATED. A MISSED APPROACH WAS CARRIED OUT BY FLT CREW WITH GEAR SELECTION NOT CHANGED. DURING MISSED APROACH, APPROX ONE MIN AFTER GEAR WAS SELECTED DOWN NLG EXTENDED & LOCKED DOWN WITH NO INPUT FROM FLT CREW.FROM GO-AROUND AIRCRAF T MADE ANOTHER APPROACH FOLLOWED BY A LDG W/O INCID.. SUBSEQUENT ENGINEERING INVEST. REVEALED THAT NLG ACTUATOR WAS UNSERVICEABLE DUE TO A CONTAMINANT BEING FOUND INTERNALLY IN ACTUATOR. ACTUATOR WAS REPLACED, GROUND RETRACTIONS CARRIED OUT SATISFACTORILY, & A/C WAS RT-SRV.

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