FTW88FA046

NTSB accident investigation · Beech B36TC · Woodward, OK · January 5, 1988

Accident · Serious injuriesField investigationFinal report
Date
January 5, 1988, 12:00 local (18:00 UTC)
Place
Woodward, OK
Injuries
2 serious
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N6624NBeech B36TC
Weather
Visual (VMC) · Day
Status
Completed · report January 16, 1990
Report
Approved by Office Director
FAA report
19880105033709A
Case key
22534

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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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.

In flight encounter with weatherClimb - to cruise
Preflight briefing service - inadequateAtc personnel(fss)Factor
Weather condition - cloudsFactor
Weather condition - icing conditionsFactor
Flight into known adverse weather - continuedPilot in commandCause
Window,flight compartment window/windshield - iceFactor
Wing - iceFactor
Loss of control - in flightApproach - vfr pattern - base leg/base to final
Airspeed - inadequatePilot in commandCause
Stall - inadvertentPilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled

Analysis

Before tkof, the plt was briefed on flt precautions for IFR & snow; however, he was not adzd of icing conds in clouds & precip above the freezing lvl to 18,000' as cautioned in the current area forecast. While climbing after tkof, he enctrd clouds & 'some light icing' btn 5500' & 6000'. He contd an en route climb until in the clear at about 10,000'. Drg the climb, predominantly rime ice & some mixed ice accumulated on the windshield & wings. Drg dscnt to the destn, similar icing conds were enctrd until the acft was in the clear at aprx 4600'. The plt then flew in VFR conds to clear his windshield. Estimating abt 1/4' of ice on the wings, the plt began a turn to final at aprx 600' to 700' AGL with a 10 kt safety margin (90 KTS). However, drg the turn, the acft stalled. The plt stated he applied corrective action, but the eng did not respond to application of full throttle. Before recovering, the acft struck the gnd & slid aprx 300' to a stop. After the acdnt, ice was fnd on the wings which was aprx 3/4' thick at the leading edges.

Aircraft

Registration
N6624N
Reported as
Beech B36TC
Category
Airplane
Serial number
EA 348
Airframe hours
554
Engine
Continental TSIO-520-UB, 300 horsepower, reciprocating
Damage
Substantial damage
Flight
Business · Part 91
Registered owner
Nw Ok Cardiopulmonary Assoc.
Airworthiness certificate
Standard, Utility
Last inspection
100 hour · September 10, 1987 · 54 hours before
Departed
WDG · Enid, OK
Flight plan
IFR
Airport
WWR · West Woodward, runway 17, 5,500 × 100 ft, concrete

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
41
Certificates
Commercial, Flight instructor
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
1,072 total · 200 in this make and model · 874 as pilot in command · 16 in the last 90 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
80° at 11 knots
Visibility
7 statute miles
Lowest ceiling
1,500 ft broken
Temperature
16 °F, dew point 10 °F
Altimeter
30.00 inHg
Observed at
GAG, 25 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.