MKC88IA046

NTSB incident investigation · Saab-Fairchild SF-340A · Fayetteville, AR · February 2, 1988

Incident · Minor injuriesIncident investigationFinal report
Date
February 2, 1988, 10:58 local (16:58 UTC)
Place
Fayetteville, AR
Injuries
3 minor, 20 uninjured
Damage
Minor damage
Phase of flight
Landing
Aircraft
N322PXSaab-Fairchild SF-340A
Weather
Instrument (IMC) · Day
Status
Completed · report July 29, 1992
Report
Approved by Office Director
FAA report
19880202001729I
Case key
34508

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

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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) - mech failure/malfLanding - roll
1 engine
Bleed air system,fittings - looseCause
Maintenance,installation - improperCompany maintenance personnelCause
Bleed air system,fittings - leakFactor
Turbine assembly,turbine wheel - overtemperatureCause
Turbine assembly - failure,totalCause
Miscellaneous/otherStanding
Misc eqpt/furnishings,slides - not installed
Door,emergency exit - other
Misc eqpt/furnishings - inadequate
Miscellaneous equipment - not understoodFlight attendant

Analysis

The capt rprtd that drg the lndg roll, there was a loud noise from the left eng followed by hvy smoke & an eng fire warning bell. He stopped the acft on a twy & ordered an evacuation. The flt attendant had difficulty opening the floor-level emerg exit. No slide or rope was available for exiting the acft; 3 psgrs rcvd minor injuries when they dropped abt 5-1/2 ft to the icy twy. An exam revealed the left eng power turbine (pt) had an uncontained failure. A teardown inspn of the eng revealed that a 'b' nut on the stage 4 compressor bleed tube coupling had become disconnected. This resulted in a loss of cooling air to the pt rotor cavity & overheating of the stage 4 turbing disk. Measurement of the stage 3 & 4 disks showed radial (creep) growth of .006' & .150', respectively. There was evidence of hvy blade tip rubs into the stator tip shroud backing material (drg application of reverse thrust), then failure of the stage 4 turbine blades & the pt module.

Aircraft

Registration
N322PX
Reported as
Saab-Fairchild SF-340A
Category
Airplane
Serial number
340A-041
Airframe hours
5,387
Engine
GE CT7-5A2, 1,735 horsepower, turbo prop
Damage
Minor damage
Flight
Part 135
Operator
Express Airlines, doing business as Republic Exp/Northwest Airlink
Registered owner
Heleasco Twenty-Four Inc
Airworthiness certificate
Standard, Transport
Last inspection
AAIP · January 30, 1988 · 15 hours before
Departed
MEM · Memphis, TN
Destination
FYV
Flight plan
IFR
Airport
FYV · Drake Field, runway 16, 6,006 × 100 ft, asphalt

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
50
Certificates
Airline transport, Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
7,314 total · 7,060 as pilot in command · 287 in the last 90 days · 7 in the last 24 hours

Weather

Conditions
Instrument (IMC) · Day
Wind
20° at 8 knots
Visibility
4 statute miles
Lowest ceiling
900 ft overcast
Temperature
27 °F, dew point 25 °F
Altimeter
30.00 inHg
Observed at
FYV

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.