- Date
- July 25, 1991, 12:00 local (17:00 UTC)
- Place
- Mcalester, OK
- Injuries
- 2 fatal
- Damage
- Destroyed
- Phase of flight
- Enroute
- Aircraft
- N413PGrimm Cavalier SA102.5
- Weather
- Instrument (IMC) · Day
- Status
- Completed · report April 8, 1993
- Report
- Approved by Office Director
- FAA report
- 19910725029849A
- Case key
- 23212
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Probable cause
The pilot's attempted flight into IMC and his subsequent loss of control due to spatial disorientation.
Sequence of events
NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.
Analysis
During a daylight flight from ennis, Oklahoma, to oshkosh, Wisconsin, the non-instrument rated pilot transitioned from VFR to IFR flight. The private pilot was fully aware of the forecasted instrument conditions and expressed his concern as to the weather. He discussed the weather with other pilots, and they recommended that he not proceed with the flight until the weather front had passed. The airplane impacted the ground in a level attitude with no forward movement and with evidence of some rotation.
Aircraft
- Registration
- N413P
- Reported as
- Grimm Cavalier SA102.5 (CAVALIER S)
- Category
- Airplane, amateur-built
- Serial number
- SA1025-72215
- Airframe hours
- 2,301
- Engine
- Lycoming O-290-D, 125 horsepower, reciprocating
- Damage
- Destroyed
- Flight
- Personal · Part 91
- Operator
- Grimm, Larry W.
- Registered owner
- Grimm, Larry W.
- Airworthiness certificate
- Special, Experimental (Special)
- Last inspection
- Unknown · June 10, 1991 · 79 hours before
- Departed
- F41 · Ennis, TX
- Destination
- OSH · Oshkosh, WI
- Airport
- MLC · Mcalester
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 46
- Certificate
- Private
- Airplane ratings
- Single-engine land
- Medical
- Class 3, Valid Medical--no waivers/lim.
- Toxicology
- Performed
- Flight hours
- 553 total
Weather
- Conditions
- Instrument (IMC) · Day
- Wind
- 150° at 8 knots
- Visibility
- 6 statute miles
- Lowest ceiling
- 900 ft broken
- Temperature
- 75 °F, dew point 72 °F
- Altimeter
- 30.00 inHg
- Observed at
- MLC, 11 nm away
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.