BFO88FA010

NTSB accident investigation · Swearingen SA-226 · Chantilly, VA · December 18, 1987

Accident · Serious injuriesField investigationFinal report
Date
December 17, 1987, 19:36 local (Dec 18, 1987, 00:36 UTC)
Place
Chantilly, VA
Injuries
1 serious, 1 minor, 6 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N23AZSwearingen SA-226
Weather
Visual (VMC) · Night/dark
Status
Completed · report October 5, 1988
Report
Approved by Office Director
FAA report
19871217079299I
Case key
11355

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.

Loss of engine power(total) - nonmechanicalApproach - faf/outer marker to threshold (ifr)
All engines
Weather condition - icing conditionsFactor
In-flight planning/decision - improperPilot in commandCause
Anti-ice/deice system - not usedPilot in commandCause
Inadequate initial trainingCheck pilotCause
Inadequate certification/approval,airmanCompany/operator mgmtCause
Wing,skin - iceFactor
Gear collapsedLanding - flare/touchdown
Terrain condition - open fieldFactor
Terrain condition - downhillFactor
Light condition - dark nightFactor

Analysis

The acft had descended through a cloud layer enroute for the scheduled lndg at iad and according to the crew had picked up some trace rime ice on its wing surfaces. Although pitot and sas (stall avoidance system) heat were used the captain elected not to use engine inlet anti-ice. Just inside the outer marker the left engine lost power followed shortly by the right engine. The captain was able to set the acft down in an open field where the gear collapsed during the landing roll. The engines were successfully run-up at the Garrett facility. The flt manual contains a warning and a note stating that engine heat and continuous ignition must be used after leaving icing conditions until the plt is confident that any significant residual ice will not be injested into the engines. Ice was found lying beneath the rt wing which matched the curvature of the leading edge of the wing. A round conical shaped piece of ice was found along the wreckage path which matched the nose of the propeller spinner.

Aircraft

Registration
N23AZ
Reported as
Swearingen SA-226
Category
Airplane
Serial number
TC-260
Airframe hours
12,820
Engine
Garrett TPE331-I0UA-5, 840 horsepower, turbo prop
Damage
Substantial damage
Flight
Part 135
Operator
Avair Incorporated, doing business as Air Virginia
Registered owner
Surburban Funding Corp.
Airworthiness certificate
Standard, Normal
Last inspection
AAIP · December 10, 1987 · 38 hours before
Departed
EWR · Newark, NJ
Destination
IAD · Chantilly, VA
Flight plan
IFR
Airport
IAD · Washington/Dulles Intl, runway 1R, 11,500 × 150 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
31
Certificate
Airline transport
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
7,200 total · 400 in this make and model · 7,080 as pilot in command · 142 in the last 90 days · 6 in the last 24 hours

Weather

Conditions
Visual (VMC) · Night/dark
Wind
330° at 8 knots
Visibility
20 statute miles
Lowest ceiling
4,200 ft overcast
Temperature
36 °F, dew point 19 °F
Altimeter
30.00 inHg
Observed at
IAD, 4 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.