A SumpThis General Aviation Timeline
		1975-1978 1979-1982 1983-1986 1992-1996 1997 1998 1999 2000 2001-2003 2004

Year

Aviation Safety and Management Consultants, ASMC, was a business owned and operated by Norman L. Horton, Jerry L. Wells collaborating, in Central Point, Oregon. Mr. Horton has retired and the company is no longer in operation, but during the company's lifetime, consultants Horton and

Wells spent many years investigating general aviation aircraft accidents. In the course of their work, they discovered problems related to fuel contamination and positive detection of it. Mr. Wells is still actively investigating aircraft accidents from his office and shop in Auburn, Washington and can be reached at (253) 735-3769.

2004

In June of 2004, Horton and Wells provided documentation of their findings to SumpThis as well as granted permission to SumpThis to distribute their information, which spans the years 1985 through 1996 and reveals ASMC's effort to work with the FAA, the NTSB and general aviation aircraft manufacturers.

ASMC's documentation is available here on the SumpThis web-site at the following link ASMC's Quest for Positive Detection of Fuel Contamination

	SumpThis continues to  for answers.
FAA Certified Sump Sump Drain Rock Wings Dip Tail Fuel Sample		Pilot Error Carbuerator Ice Undetermined	NTSB says the engine runs fine in its post crash engine test stand with uncontaminated fuel.	Will it run if your engine test stand uses contaminated fuel

Summary of undetermined engine failures for the years 1964 through 2002 as of October 31, 2003.

Articles

Year	Undetermined Engine Failures
			Drainage Flaws Suspected in Cessna Fuel Tanks By James Wynbrandt, (2/21/2001. © Flyer Media, Inc.)
1964	90
1965	155		Scovill answers the question, "Where Did the Water Contamination Come From"?
1966	130
1967	199		Detection Unknown, Testing Cessna's Prescribed Preflight Procedures.
1968	207
1969	227		Cessna's Bladder Tank from the Years 1978 to 1986
1970	264
1971	228
1972	167
1973	197
1974	238
1975	223
1976	212
1977	198
1978	233
1979	234
1980	238
1981	268
1982	199
1983	200
1984	166
1985	137
1986	165
1987	135
1988	42
1989	87
1990	113
1991	120
1992	110
1993	147
1994	144
1995	144
1996	125
1997	134
1998	118
1999	112
2000	106
2001	123
2002	83	Yearly Average
Sum	6,418	164.6

		1975-1978 1979-1982 1983-1986 1992-1996 1997 1998 1999 2000 2001-2003 2004