NTSB Identification: CHI88FA046.
The docket is stored on NTSB microfiche number 37770.
Accident occurred Monday, January 18, 1988 in CARBONDALE, IL
Probable Cause Approval Date: 05/15/1989
Aircraft: PIPER PA-23-250, registration: N40265
Injuries: 3 Fatal.

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.

SHORTLY AFTER REPORTING THE OUTER MARKER WHILE EXECUTING AN ILS RUNWAY 18 APPROACH IN ACTUAL INSTRUMENT METEOROLOGICAL CONDITIONS, THE AIRCRAFT DEVIATED LEFT OF THE LOCALIZER CENTERLINE. AT A POSITION APPROXIMATELY 1/2 MILE OUTSIDE THE MIDDLE MARKER AND ABOUT 1/4 MILE LEFT OF THE LOCALIZER CENTERLINE, THE AIRCRAFT DESCENDED INTO A WOODED AREA ON AN EASTERLY HEADING. THE AIRCRAFT IMPACTED THE TREES AND THEN THE TERRAIN IN A SLIGHTLY LEFT BANK AND SLIGHTLY NOSE LOW ATTITUDE. ENGINE EXAMINATION AND TEARDOWN REVEALED NO EVIDENCE OF PRE-IMPACT MALFUNCTION. A FLIGHT CHECK OF THE ILS RUNWAY 18 WAS PERFORMED THE NEXT DAY AND INDICATED THE SYSTEM WAS FUNCTIONING NORMALLY. INSPECTION OF THE AIRCRAFT INSTRUMENTS DID NOT DISCLOSE ANY MALFUNCTIONS. THE PILOT WAS IN CONTACT WITH ATC AND DID NOT REPORT ANY PROBLEMS BEFORE THE IMPACT OCCURRED. ALL PILOT AND AIRCRAFT RECORDS WERE DESTROYED BY POST-IMPACT FIRE. PILOT'S TOTAL INSTRUMENT FLYING EXPERIENCE WAS NOT DETERMINED; OBTAINED INSTRUMENT RATING 1/3/87.

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

IFR PROCEDURE..NOT FOLLOWED..PILOT IN COMMAND

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

PROPER DESCENT RATE..NOT MAINTAINED..PILOT IN COMMAND

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

MISSED APPROACH..NOT PERFORMED..PILOT IN COMMAND


Contributing Factors

LIGHT CONDITION..DARK NIGHT


Contributing Factors

WEATHER CONDITION..OBSCURATION


Contributing Factors

WEATHER CONDITION..FOG


Contributing Factors

OBJECT..TREE(S)


Contributing Factors

LACK OF TOTAL EXPERIENCE IN TYPE OF AIRCRAFT..PILOT IN COMMAND

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