NTSB Identification: ATL98FA009.
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Accident occurred Thursday, November 13, 1997 in MADISON, MS
Probable Cause Approval Date: 02/28/2000
Aircraft: Beech B100, registration: N500ML
Injuries: 1 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.

During an IFR arrival, vectors were provided for an ILS runway 16L approach. While on assigned heading and altitude of 270 degrees and 3,000 feet, about 8 miles north of the final approach fix, the pilot was told to turn left to 185 degrees and maintain 2,200 feet until established on the localizer, then he was cleared for the approach. The pilot acknowledged the instructions. About 1 minute later, communication and radar contact with the airplane were lost. Eye witnesses near the accident site observed the airplane as it descended below the cloud layer. The airplane was described as being in a steep left bank with the nose down. Witnesses also stated that the engines were revving. Within seconds of the visual sighting, the airplane crashed. Examination of the airframe failed to disclose a mechanical problem. No fire or smoke was seen coming from the airplane before it crashed. The pilot did not report experiencing a problem with the airplane to the tower controller. Toxicology tests of the pilot indicated O.323 mcg/ml chlorpheniramine (a sedating antihistamine) in liver fluid and 0.073 mcg/ml chlorpheniramine in kidney fluid. Also, unspecified levels of dextromethorphan (a cough suppressant), pseudoephedrine (a decibgestabt), and phenylpropanolamine (a decongestant) were reported in kidney and liver fluids. All medications are available in over-the-counter cold remedies.

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

the pilot's failure to maintain control of the aircraft due to spatial disorientation. A related factor was: the instrument weather conditions.

Full narrative available

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