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NTSB Report

January 6, 1999 · Beech BE-V35B · N740T

Olathe, KS

Overview

Report Status
Final with probable cause
Event Type
Accident
Date
January 6, 1999
Injury Outcomes
No injuries (1 uninjured)
Location
Olathe, KS
Aircraft
Beech BE-V35B
Tail Number
N740T
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CHI99LA061

The pilot reported that he was cleared to 4,000 feet msl at his request. Approximately 40 miles southwest of Johnson County Executive Airport, Olathe, Kansas, the pilot noticed clear ice forming on the windshield and the wing's leading edge. He added that the rime ice build up was three inches thick. The pilot stated that he flew the localizer 36 approach at 120 mph and as he crossed the threshold of runway 36, approximately 20 feet above the runway surface, he started to 'round out and the airplane immediately stalled and hit hard'. The aircraft came to rest on the right side approach end of runway 36 where the right main and nose landing gear were found collapsed. At 1553, the Johnson County Executive Airport automated surface observing system recorded a surface temperature of -2 degrees Celsius and an overcast cloud layer at 2,200 feet msl. Advisory circular 00-6A, Aviation weather states, '...all clouds at subfreezing temperatures have icing potential. However, drop size, drop distribution, and aerodynamic effects of the aircraft influence ice formation.' AC 00-6A also states, '...If your aircraft is not equipped with deicing or anti-icing equipment, avoid areas of icing. Water (clouds or precipitation) must be visible and outside air temperature must be near zero degrees Celsius or colder for structural ice to form.' Post accident examination of the aircraft revealed 3/4-inch thick rime ice on the aircraft's wing and empennage leading edges.

NTSB Probable Cause

The pilot's continued flight into adverse weather that resulted in structural icing and subsequently an aerodynamic stall on landing flare. A factor was the pilot's inadequate weather evaluation .

Full Narrative

On January 6, 1999, at 1530 central standard time, a Beech V35B, N740T, owned and piloted by a commercial pilot, received substantial damage on impact with terrain during a hard landing on runway 36 (4,099 feet by 75 feet, dry concrete) at the Johnson County Executive Airport (OJC), Olathe, Kansas. Visual meteorological conditions prevailed at the time of the accident. The 14 CFR Part 91 personal flight was operating on an instrument flight plan. The pilot reported no injuries. The flight departed Coffey County Airport (UKL), Burlington, Kansas, at 1456, and was en route to OJC. The pilot reported that he was cleared to 4,000 feet msl at his request following departure from UKL. At approximately 40 miles southwest of OJC, the pilot noticed clear ice forming on the windshield and leading edge of the wing. He added that the rime ice build up was three inches thick. The pilot stated that he flew the localizer 36 approach at 120 mph and as he crossed the threshold at approximately 20 feet above the runway surface, he started to "round out and the airplane immediately stalled and hit hard". The aircraft came to rest 200 feet north and 60 feet east of the approach end of runway 36 where the right main and nose landing gear were found collapsed. At 1553, the OJC automated surface observing system recorded a surface temperature of -2 degrees Celsius and an overcast cloud layer at 2,200 feet msl. Advisory circular 00-6A, Aviation weather states, "...all clouds at subfreezing temperatures have icing potential. However, drop size, drop distribution, and aerodynamic effects of the aircraft influence ice formation." AC 00-6A also states, "...If your aircraft is not equipped with deicing or anti-icing equipment, avoid areas of icing. Water (clouds or precipitation) must be visible and outside air temperature must be near ) degrees Celsius or colder for structural ice to form." Postaccident photos of the aircraft revealed approximately 3/4-inch thick rime ice on the aircraft's wing and empennage leading edges.

Flight

Event TypeAccident
Event Time15:30 CST
Nearest AirportJohnson County Executive (0nm)
Runway36
Runway Length4099 ft
Runway Width75 ft
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftBeech BE-V35B
Tail NumberN740T
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · IO-520BA · Reciprocating · 250
Seats4

People & Injuries

Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 77 · Third Class

Conditions

ConditionsVMC
LightDaylight
Wind360° @ 16 kt, gusting 24 kt
Visibility10 sm
CeilingOvercast 2200 ft
Temperature / Dew Point28 C / 19 C
Altimeter30.00 inHg
Observation Time21:53
Weather SourceWFAC

Appendix: Source Data