NTSB Identification: ATL83FKG07
14 CFR Part 91: General Aviation
Accident occurred Thursday, December 30, 1982 in LUMBER CITY, GA
Probable Cause Approval Date: 12/30/1983
Aircraft: PIPER PA-28R-200, registration: N2805R
Injuries: 4 Serious.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

DURING FLIGHT, THE OIL PRESSURE BEGAN DROPPING RAPIDLY JUST AFTER THE ENGINE RPM ABRUPTLY INCREASED. MINUTES LATER, THE RPM DECREASED AND THE ENGINE FAILED. WHILE THE PILOT WAS MAKING A FORCED LANDING IN DARKNESS, THE AIRCRAFT STRUCK AN OBJECT JUST BEFORE TOUCHING DOWN. AN INVESTIGATION REVEALED THAT AN OIL LINE TO THE GOVENOR HAD FAILED. THE OIL LINE HAD RECENTLY BEEN REPLACED AND THE PLANE HAD FLOWN ONLY 5 HRS SINCE THE REPAIR. THE LINE HAD FAILED FROM FATIGUE AT THE FORWARD END WHICH WAS BEVELED FOR A FITTING. THE LINE WAS NORMALLY SUPPLIED BY AVCO LYCOMING AS PN 75A69, FABRICATED FROM AMS 5566 STAINLESS STEEL. THE FAILED LINE WAS MADE FROM A LOW CARBON STEELALLOY. THE LINE FAILED AFTER ONLY 5 HRS OF OPERATION.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

LUBRICATING SYSTEM,OIL LINE..IMPROPER

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

MAINTENANCE,REPLACEMENT..IMPROPER..COMPANY MAINTENANCE PERSONNEL

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

LUBRICATING SYSTEM,OIL LINE..FATIGUE

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

FLUID,OIL..EXHAUSTION


Contributing Factors

LIGHT CONDITION..DARK NIGHT

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