# NTSB NYC93IA017: Boeing 737-300, N586US, Pittsburgh, PA, October 12, 1992

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: October 12, 1992, 10:15 local (14:15 UTC)
- Place: Pittsburgh, PA
- Location: 40.4914° N, 80.2327° W: Placed by OpenAirDocs at PITTSBURGH INTL (PIT), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=40.4914&lon=-80.2327&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 133 uninjured
- Status: Completed, report May 26, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 37241
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC93IA017
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/37241/pdf
- Page: https://openairdocs.org/ntsb/NYC93IA017

## Probable cause

THE HIGH CYCLE FATIGUE FAILURE OF BLADES ON THE STAGE 1 HIGH PRESSURE COMPRESSOR, WHICH RESULTED IN BLADE FRACTURE AND SUBSEQUENT INTERNAL ENGINE DAMAGE AND FIRE.

## Sequence of events

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

- Fire, takeoff - roll/run
  - compressor assembly,blade - fatigue (cause)
  - compressor assembly,blade - fractured (cause)
  - aborted takeoff - performed, pilot in command
  - evacuation - performed, pilot in command

## Analysis

THE AIR CARRIER B 737 300 WAS ON TAKEOFF ROLL, WHEN THE AIRCREW WAS ADVISED BY OTHER AIRPLANES THAT 'SMOKE AND FLAMES WERE...COMING FROM THE RIGHT ENGINE.'  THE CREW ABORTED THE TAKEOFF, STOPPED THE AIRPLANE ON THE RUNWAY AND ORDERED AN EVACUATION BY THE EMERGENCY SLIDES.  NONE OF THE 5 CREWMEMBERS NOR THE 128 PASSENGERS WERE INJURED.  THE ENGINE FIRE WAS SUPPRESSED WHEN THE ENGINE WAS SHUTDOWN. THE FAILURE WAS CONTAINED TO THE ENGINE INTERIOR. EXAMINATION OF THE ENGINE REVEALED A HIGH CYCLE FATIGUE FAILURE OF 2 BLADES OF THE STAGE 1 HIGH PRESSURE COMPRESSOR.

## Aircraft

- Registration: [N586US](https://openairdocs.org/deregistered/N586US-2007-08-13), registration cancelled 2007-08-13, S/N 23931, built 1988 (OpenAirDocs)
- Reported make and model: BOEING 737-300
- Registry model: [Boeing 737-301](https://openairdocs.org/model/boeing-737-301) (registry code 138447R) (OpenAirDocs)
- Registry engine: [GE CFM56 series](https://openairdocs.org/engine/ge-cfm56-series) (registry code 30016, turbo-fan) (OpenAirDocs)
- Category: Airplane
- Serial number: 23931
- Airframe hours: 15560
- Engines: GE CFM 56-3B2/B1 22000 lbs thrust turbo jet
- Damage: No damage
- Fire: On-Ground
- Flight: Part 121
- Operator: Usair
- Registered owner: Usair
- Airworthiness certificate: Standard, Transport
- Last inspection: Continuous airworthiness, October 8, 1992, 20 hours before
- Departed: PIT
- Destination: CLT, CHARLOTTE, NC
- Flight plan: IFR
- Airport: PIT, Pittsburgh Int'L, runway 28, 8,039 × 150 ft, macadam

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 42; airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 15,327 total, 9,000 in this make and model, 74 in the last 90 days, 15 in the last 30 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 250° at 9 knots
- Visibility: 7 statute miles
- Lowest ceiling: none
- Temperature: 46 °F, dew point 45 °F
- Altimeter: 29.00 inHg

## 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 19921012046589I](https://openairdocs.org/incident/19921012046589I), Oct 12, 1992: Boeing 737301, Pittsburgh, PA. Smoke and flames from right engine on takeoff. Aborted. Appears to have stage one or two blade failure.

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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