# NTSB MKC88IA046: Saab-Fairchild SF-340A, N322PX, Fayetteville, AR, February 2, 1988

- Type: NTSB incident investigation
- Classification: Incident · Minor injuries · Incident investigation · Final report
- Date: February 2, 1988, 10:58 local (16:58 UTC)
- Place: Fayetteville, AR
- Coordinates: 36.070453, -94.150939 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=36.0705&lon=-94.1509&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 3 minor, 20 uninjured
- Status: Completed, report July 29, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 34508
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC88IA046
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34508/pdf
- Page: https://openairdocs.org/ntsb/MKC88IA046

## Sequence of events

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

- Loss of engine power(total) - mech failure/malf, landing - roll
  - 1 engine
  - bleed air system,fittings - loose (cause)
  - maintenance,installation - improper, company maintenance personnel (cause)
  - bleed air system,fittings - leak (contributing factor)
  - turbine assembly,turbine wheel - overtemperature (cause)
  - turbine assembly - failure,total (cause)
- Miscellaneous/other, standing
  - misc eqpt/furnishings,slides - not installed
  - door,emergency exit - other
  - misc eqpt/furnishings - inadequate
  - miscellaneous equipment - not understood, flight 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 (not matched to a registry record)
- Reported make and model: SAAB-FAIRCHILD SF-340A
- Category: Airplane
- Serial number: 340A-041
- Airframe hours: 5387
- Engines: GE CT7-5A2 1735 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.

- Pilot; age 50; 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 (OpenAirDocs).

- [Incident 19880202001729I](https://openairdocs.org/incident/19880202001729I), Feb 2, 1988: Saab SF340A, Fayetteville, AR, Minor damage. Engine failure on rollout. Fire in engine upon selecting propeller reverse. Fire drill used. Emergency evacuation.

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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