# Incident 20001015038499I: Piper PA46310P, San Diego, CA, October 15, 2000

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: October 15, 2000, 21:05 local time
- Place: San Diego, CA
- Airport: Montgomery Field Airport
- Damage: Minor damage
- Phase of flight: Roll-Out (Fixed Wing)
- Operating rules: General operating rules (Part 91)
- Location: 32.7153° N, 117.1573° W: Placed by OpenAirDocs: center of San Diego, CA, within about 10 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=32.7153&lon=-117.1573&mi=10
- Aircraft: N4363Q (not matched to a registry record)
- Reported make and model: PIPER PA46310P
- People aboard: 3
- Fatal injuries: 0
- Pilot flight hours: 5,000 total, 30 in this make and model, 10 in the last 90 days
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20001015038499I

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

(-23) THE PILOT STATED THAT ON APPROACH FOR LANDING, THE LANDING GEAR FAILED TO EXTEND. AFTER SEVERAL ATTEMPTS TO GET ALL THREE GEAR SAFE LIGHTS, THE NOSE GEAR LIGHT WOULD STILL NOT COME ONE. THE TOWER ADVISED THE PILOT THAT THE GEAR APPEARED TO BE DOWN AND A LANDING WAS ATTEMPTED. DURING LANDING, THE NOSE GEAR COLLAPSED AND THE AIRCRAFT SKIDDED TO A STOP ON THE LOWER ENGINE COWLING, WITH THE PROPELLER STRIKING THE RUNWAY. THE A/C OWNER HAD MAINTENANCE PERSONNEL START REPAIRS PRIOR TO FAA INVESTIGATIONS. PERSONNEL AT THIS REPAIR STATION INDICATED THAT THEY FOUND NO DEFECTS IN THE LANDING GEAR SYSTEM AND THAT IT OPERATED NORMALLY WHEN IT WAS TESTED. IT WAS NOTED THAT THIS A/C WAS BEING USED FOR FLIGHT TRAINING AT THE TIME OF THE INCIDENT AND THAT THE HYDRAULIC SYSTEM HAD BEEN UNDER HEAVY USE CYCLING FLAPS AND LANDING GEAR. THIS A/C HAS A CONTROL DEVICE THAT DEENERGIZES THE ELCTRIC HYDRAU LIC PUMP AFTER 17 SECONDS OF CONTINOUS OPERATION. IT IS SPECULATED THAT THE HYDRAULIC MOTOR DUY CYCLE MAY HAVE BEEN EXCEEDED AND THIS DEVICE DEACTIVATED THE PUMP DURING OPERATION OF THE FLAPS AND LANDING GEAR ON APPROACH FOR LANDING. THE PUMP MOTOR CIRCUIT MAY BE RESET BY CYCLING THE "HYD PUMP"     CIRCUIT BREAKER, BUT NEITHER THE STUDENT OR THE INSTRUCTOR WERE AWARE OF THIS. THE EMERGENCY LANDING GEAR EXTENSION SYSTEM FOR THIS AIRCRAFT DEPENDS ON INERTIA TO ASSIST THE GEAR INTO THE LOCKED POSITION. IT IS MOST LIKELY THAT THE GEAR WAS EITHER PARTIALLY DOWN, OR THEIR AIRSPEED TOO HIGH, WHEN THE EMERGENCY SYSTEM WAS ACTIVATED, PREVENTING THE NOSE GEAR FROM LOCKING INTO THE DOWN POSITION. THE AIRCRAFT OWNER, STUDENT, AND INSTRUCTOR WERE COUNSELED REGARDING THE OPERATION OF THE AIRCRAFT HYDRAULIC AND LANDING GEAR SYSTEMS.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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