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Atlas / NTSB / DEN88FA030

NTSB CAROL · Event

Event DEN88FA030

1987-11-25 KNOLLS, Utah, United States Fatal 1 aircraft Status: Completed

Registry · N2EE

FAA Aircraft Registry record.

Make / Model

GRUMMAN AMERICAN AA-5B

Year of manufacture

1975 · 12 years old at event

Engine

LYCOMING O&VO-360 SER (180 hp)

Seats / Engines

4 seats · 1 engine

Last airworthiness date

19750514

ADS-B equipped

Yes — Mode-S A18DBA

Registrant of record

MATTHEWS MARK A

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Factual narrative

THE LAST COMM WITH THE FLT WAS WHEN THE PLT CONTACTED ELKO RADIO AND REQUESTED THE SALT LAKE CITY WX. HE REPORTED THAT HE WAS AT 11500 FT AND VFR ON TOP. THE SPECIALIST ON DUTY WAS UNABLE TO PROVIDE THE WX INFO DUE TO A COMPUTER SYS OUTAGE BUT RECOMMENDED THAT THE PLT CTC CEDAR CITY FLT WATCH FOR WX INFO. NO REC OF ANY FURTHER CONTACTS BY THE PLT COULD BE FOUND. APPROX 1 HR LATER, A WITNESS RPTD SEEING ACFT LIGHTS AT A LOW ALTITUDE HEADING IN A SOUTHERLY DIRECTION, NEAR THE CRASH SITE. THE WITNESS STATED THAT THE WX AT THE TIME WAS SNOW AND ICY CONDITIONS AND THE STATE HWY PATROL CONFIRMED THAT BLIZZARD CONDITIONS EXISTED IN THE AREA. EXAM OF THE WRECKAGE REVEALED THAT THE ACFT DESCENDED INTO THE DESERT IN A SLIGHT NOSE DOWN, STEEP RIGHT WING DOWN ATTITUDE ON A TRACK OF 170 DEGREES. NO EVIDENCE OF MECH FAILURE/MALF OF THE ACFT OR ITS ENG WAS FOUND. THE PLT HAD A PRIOR HISTORY OF HYPOXIC PROBLEMS. THE ALT AT WHICH HE LAST REPORTED WAS IN THE AVERAGE SUB-HYPOXIC RANGE. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1987_DEN88FA030.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.