Piper PA-60-601 N9825Q

Summary

On 21 September 1993 at about 11:40 local time, a Piper PA-60-601 registered N9825Q was involved in an accident near Lone Rock, Wisconsin, United States. One person was on board and nobody was injured. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

21 September 1993 at 11:40

Classification

Accident

Location

Lone Rock, Wisconsin, United States

Nearest airport

Tri-County Regional (LNR)

Coordinates

43.1793, -90.1997

Aircraft

Piper PA-60-601

Registration

N9825Q

Category

Airplane

Engines

2

Operator

Not recorded

Operating rule

Part 135: Air Taxi & Commuter

Purpose of flight

Unknown

Phase of flight

Not recorded

Route

Chicago → St. Paul

Aircraft damage

Substantial

Weather

VMC

Light

Night/Dark

NTSB number

CHI93LA371

Nobody was injured.

INADEQUATE MAINTENANCE AND EXCESSIVE AIRSPEED DURING THE LANDING APPROACH.

Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.

Read the full NTSB narrative

DURING CRUISE FLIGHT THE PILOT NOTICED A LOSS OF OIL PRESSURE AND AN INCREASE IN OIL TEMPERATURE ON THE LEFT ENGINE. HE SHUT DOWN THE ENGINE AND DIVERTED TO THE NEAREST AIRPORT. A VOR APPROACH WAS MADE AND DUE TO THE INABILITY TO MAINTAIN ALTITUDE, THE PILOT WAS UNABLE TO CIRCLE TO LAND ON THE LONGER RUNWAY. DURING THE LANDING ROLL, THE AIRPLANE OVERRAN THE END OF THE RUNWAY AND CONTACTED ROUGH TERRAIN. POST ACCIDENT INSPECTION REVEALED THE NUMBER 4 MAIN JOURNAL BEARING HAD SPUN. MATERIAL FROM THE BEARING AND THE DAMAGED CRANKCASE HAD CLOGGED THE OIL SUCTION SCREEN. WASHERS WERE FOUND ADDED TO THE OIL PRESSURE RELIEF VALVE IN AN ATTEMPT TO REGULATE THE OIL PRESSURE. THE ENGINE WAS OVERHAULED 350 FLIGHT HOURS PRIOR TO THE ACCIDENT.

Quoted verbatim from the NTSB record.