# NTSB MKC88FA059: Beech E18S, N45A, Vienna, MO, March 4, 1988

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: March 3, 1988, 22:05 local (Mar 4, 1988, 04:05 UTC)
- Place: Vienna, MO
- Coordinates: 38.180545, -91.940422 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=38.1805&lon=-91.9404&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 2 fatal
- Status: Completed, report November 28, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 34487
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC88FA059
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34487/pdf
- Page: https://openairdocs.org/ntsb/MKC88FA059

## Sequence of events

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

- Airframe/component/system failure/malfunction, cruise - normal
  - anti-ice/deice system,wing (contributing factor)
  - maintenance,inspection - inadequate, company maintenance personnel (contributing factor)
  - wing - ice (cause)
  - ice/frost removal from aircraft - not performed, pilot in command
  - weather condition - icing conditions (contributing factor)
  - flight into known adverse weather - performed, pilot in command (contributing factor)
  - company-induced pressure, company/operator management (contributing factor)
  - anti-ice/deice system,wing - failure,total (cause)
- Forced landing, descent - emergency
- In flight collision with terrain/water, descent
  - light condition - dark night (contributing factor)
  - weather condition - low ceiling (contributing factor)
  - weather condition - fog (contributing factor)
  - terrain condition - mountainous/hilly

## Analysis

THE PLT RCVD A WX BRIEFING BFR STARTING A NGT CARGO OPN IN KNOWN ICING CONDS. BFR THE FLT, A LINE SERVICEMAN NOTICED ICE ON THE ACFT'S WINGS & SUGGESTED ITS REMOVAL, BUT THE PLT DECLINED. APRX 45 MIN AFTER TKOF, THE PLT RPRTD TO ARTCC THAT A DE-ICE BOOT HAD 'BLOWN' & HE WAS HAVING DIFFICULTY CTLG THE ACFT. HE SAID THE BOOT WAS 'GOING BACK AND FORTH' & THAT FULL RGT AILERON WAS REQUIRED TO KEEP THE WINGS LEVEL. ALSO, HE RPRTD A CONTINUOUS LOSS OF ALT & SAID THAT FULL RGTAILERON WOULD NOT KEEP THE ACFT FM TURNING TO THE LEFT. SUBSEQUENTLY, THE ACFT CRASHED ON DESCENDING TERRAIN WHILE IN A SLIGHTLY NOSE DOWN, LEFT WING LOW ATTITUDE. MUCH OF THE ACFT (INCLUDING MUCH OF THE LEFT WING) WAS DEMOLISHED BY IMPACT & FIRE. PROP SLASH MARKS INDCD THE ENGS WERE PROVIDING PWR. MAINT RECORDS HAD NO INFO OF REPLACEMENT, REPAIR OR MODIFICATION OF THE DE-ICE BOOTS IN THE PREV 10 YRS. THE PLT'S WIFE INDCD HE HAD PREVIOUSLY BEEN PRESSURED TO FLY ACFT WITH DISCREPANCIES. SIGMETS GOLF 3 & 4 WARNED OF OCNL SEVERE MIXED ICING IN CLOUDS & PRECIP.

## Aircraft

- Registration: [N45A](https://openairdocs.org/deregistered/N45A-1995-10-30), registration cancelled 1995-10-30, S/N BA101 (OpenAirDocs)
- Reported make and model: BEECH E18S
- Registry model: [Beech E18S](https://openairdocs.org/model/beech-e18s) (registry code 1151006) (OpenAirDocs)
- Category: Airplane
- Serial number: BA-101
- Airframe hours: 8971
- Engines: P&W R-985-AN14-B 450 horsepower reciprocating
- Damage: Destroyed
- Fire: On-Ground
- Flight: Part 135
- Operator: Midwest Executive
- Registered owner: Younkin, Robert A
- Airworthiness certificate: Standard, Utility; Standard, Normal
- Last inspection: Annual, December 29, 1987
- Departed: SGF, SPRINGFIELD, MO
- Destination: VIENNA, MO
- Flight plan: IFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 44; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: left; toxicology performed; flight hours: 5,000 total, 360 in this make and model

## Weather

- Conditions: Instrument (IMC), Night/dark
- Visibility: 1 statute miles
- Temperature: 30 °F

## 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 19880303004479A](https://openairdocs.org/incident/19880303004479A), Mar 3, 1988: Beech E18S, Vienna, MO, Destroyed, 2 fatal. Departed into icing IMC with airframe already ice covered. Advised control loss due blown deice boot.

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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