1 fatality

VFR Cross-Country Flight Ends in Ridge Collision During Marginal Weather (N48737)

Gilroy, CA, US

On November 17, 1996, a Cessna 152 (registration N48737) was involved in an aviation accident near Gilroy, CA. One person was killed. Investigators recorded the probable cause as: flight by the pilot into into adverse weather conditions, and his failure to maintain altitude or clearance from mountainous terrain. The adverse weather and terrain conditions were related factors. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 8 related events involving the same aircraft type or operator are linked below.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 2026-07-04Data APIEditorial standards

An instrument-rated pilot flew a VFR cross-country flight in marginal weather over mountainous terrain, colliding with a coastal ridge at 1,940 feet. Toxicology tests detected asthma and blood pressure medications, as well as decongestants.

Flight Details

The pilot, who held an instrument rating, conducted a visual flight rules (VFR) cross-country flight over mountainous terrain. The aircraft struck a coastal mountain ridge at an elevation of 1,940 feet. The ridge was the last terrain feature before the pilot's destination. Weather conditions in the area were marginal, with an AIRMET valid for the flight period forecasting mountain obscuration and instrument flight rules (IFR) conditions. No record was found of the pilot obtaining a preflight or in-flight weather briefing. The accident site was obscured by low ceilings, which hindered search and rescue operations.

Pilot Qualifications

Review of the pilot's logbook revealed that he lacked the recency of experience required to fly in instrument meteorological conditions (IMC) under instrument flight rules (IFR).

Toxicology Results

Toxicological analysis of the pilot's blood and urine tested positive for theophylline, a drug commonly used to treat asthma, at levels of 2.2 mcg/ml in blood and 22.5 mcg/ml in urine. Additionally, undetermined levels of ephedrine and phenylpropanolamine, both over-the-counter decongestants, were detected in blood and urine. An undetermined level of hydrochlorothiazide, a drug commonly used to treat high blood pressure, was found in the pilot's blood.

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Frequently asked questions

What happened in the 17 Nov 1996 Cessna 152 accident near Gilroy, CA?

An instrument-rated pilot flew a VFR cross-country flight in marginal weather over mountainous terrain, colliding with a coastal ridge at 1,940 feet. Toxicology tests detected asthma and blood pressure medications, as well as decongestants.

Were there any fatalities in the 17 Nov 1996 Cessna 152 accident?

The accident was fatal, resulting in 1 fatality.

What aircraft was involved and where did it happen?

The accident on 17 Nov 1996 involved a Cessna 152, registration N48737, at Gilroy, CA.

What was the probable cause of the accident?

flight by the pilot into into adverse weather conditions, and his failure to maintain altitude or clearance from mountainous terrain. The adverse weather and terrain conditions were related factors.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001208X07055. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.