2 fatalities

Collision with Terrain During ILS Approach (N79SF)

Monroe, United States of AmericaLanding (descent or approach)

On January 8, 1988, a Learjet 36 (registration N79SF) operated by Phoenix Air Group was involved in an aviation accident near Monroe, United States of America during landing or approach. 2 people were killed. Investigators recorded the probable cause as: Occurrence #1: in flight collision with terrain/water Phase of operation: approach - iaf to faf/outer marker (ifr) Findings 1. (c) descent - excessive - pilot in command 2. (f) inattentive - pilot in command 3. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 2 related events involving the same aircraft type or operator are linked below.

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Primary report: the U.S. National Transportation Safety Board (NTSB) historical archiveUpdated 2026-07-04Data APIEditorial standards

While executing an ILS approach, the aircraft impacted terrain at 5.9 DME with a high rate of descent. No pre-impact failure was found. The copilot lacked total experience in the aircraft type.

Accident Summary

During an ILS approach, the aircraft turned back inbound on the procedure turn toward the outer marker. The copilot calmly reported being 5.9 DME without any indication of a problem. Shortly thereafter, the aircraft struck the ground at approximately 5.9 DME, about 10 statute miles from the airport. The impact attitude was slightly nose up with a slight right wing down, and the aircraft had a high vertical rate of descent and high forward speed. The aircraft was demolished.

Investigation Findings

Investigators found no evidence of any pre-impact failure or malfunction of the aircraft or its systems. The copilot was not rated in the aircraft and had logged only 7.9 hours of jet time in his personal logbook.

Probable Cause

The official probable cause findings listed an in-flight collision with terrain during the approach phase from the initial approach fix to the final approach fix/outer marker (IFR). Specific findings included:

  • Excessive descent by the pilot in command
  • Inattentiveness by the pilot in command
  • Failure to level off by the pilot in command
  • Lack of total experience in type of aircraft by the copilot/second pilot

Frequently asked questions

What happened in the 8 Jan 1988 Learjet 36 accident near Monroe, United States of America?

While executing an ILS approach, the aircraft impacted terrain at 5.9 DME with a high rate of descent. No pre-impact failure was found. The copilot lacked total experience in the aircraft type.

Were there any fatalities in the 8 Jan 1988 Learjet 36 accident?

The accident was fatal, resulting in 2 fatalities.

What aircraft was involved and where did it happen?

The accident on 8 Jan 1988 involved a Learjet 36, registration N79SF, operated by Phoenix Air Group, at Monroe, United States of America.

What was the probable cause of the accident?

Occurrence #1: in flight collision with terrain/water Phase of operation: approach - iaf to faf/outer marker (ifr) Findings 1. (c) descent - excessive - pilot in command 2. (f) inattentive - pilot in command 3. (c) level off - not performed - pilot in command 4. (f) lack of total experience in type of aircraft -…