# NTSB FTW88FA046: Beech B36TC, N6624N, Woodward, OK, January 5, 1988

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Field investigation · Final report
- Date: January 5, 1988, 12:00 local (18:00 UTC)
- Place: Woodward, OK
- Coordinates: 36.420387, -99.399436 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=36.4204&lon=-99.3994&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 2 serious
- Status: Completed, report January 16, 1990
- Report: Approved by Office Director
- NTSB case key (mKey): 22534
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW88FA046
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/22534/pdf
- Page: https://openairdocs.org/ntsb/FTW88FA046

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- In flight encounter with weather, climb - to cruise
  - preflight briefing service - inadequate, atc personnel(fss) (contributing factor)
  - weather condition - clouds (contributing factor)
  - weather condition - icing conditions (contributing factor)
  - flight into known adverse weather - continued, pilot in command (cause)
  - window,flight compartment window/windshield - ice (contributing factor)
  - wing - ice (contributing factor)
- Loss of control - in flight, approach - vfr pattern - base leg/base to final
  - airspeed - inadequate, pilot in command (cause)
  - stall - inadvertent, pilot in command (cause)
- In flight collision with terrain/water, descent - 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](https://openairdocs.org/deregistered/N6624N-1989-03-16), registration cancelled 1989-03-16, S/N EA348 (OpenAirDocs)
- Reported make and model: BEECH B36TC
- Registry model: [Beech B36TC](https://openairdocs.org/model/beech-b36tc) (registry code 1151609) (OpenAirDocs)
- Category: Airplane
- Serial number: EA 348
- Airframe hours: 554
- Engines: 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

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 41; 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 (OpenAirDocs).

- [Accident 19880105033709A](https://openairdocs.org/incident/19880105033709A), Jan 5, 1988: Beech B36TC, Woodward, OK, Substantial damage. Operated in known icing conditions. Stalled and recovered too late to prevent impact while turning final approach.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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