# NTSB CHI84IA373: Boeing 737-291, N7351F, Madison, WI, August 29, 1984

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: August 29, 1984, 14:50 local (19:50 UTC)
- Place: Madison, WI
- Coordinates: 43.100444, -89.310554 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=43.1004&lon=-89.3106&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 108 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 12458
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI84IA373
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/12458/pdf
- Page: https://openairdocs.org/ntsb/CHI84IA373

## 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, takeoff - initial climb
  - turbine assembly,turbine blade - failure,total (cause)
  - turbine assembly,turbine blade - separation
  - precautionary landing - performed, pilot in command

## Analysis

SHORTLY AFTER LIFT-OFF & WHILE CLIMBING THRU ABOUT 150 FT AGL, THERE WAS A LOUD NOISE FROM THE LEFT ENG WHEN IT FAILED. THE AIRCREW SECURED THE LEFT ENG, RETURNED TO THE ARPT & MADE A SINGLE ENG LANDING WITHOUT FURTHER INCIDENT. AN INVESTIGATION REVEALED THAT A 1ST STAGE TURBINE BLADE HAD FAILED IN THE LEFT ENG & WAS INJESTED IN THE REMAINDER OF THE TURBINE.

## Aircraft

- Registration: N7351F (not matched to a registry record)
- Reported make and model: BOEING 737-291
- Category: Airplane
- Serial number: 22384
- Engines: P&W JT8D-9A 14500 lbs thrust turbo jet
- Damage: No damage
- Flight: Part 121
- Registered owner: Frontier Airlines, Inc.
- Airworthiness certificate: Standard, Transport
- Departed: MSN, MADISON, WI
- Destination: RFD, ROCKFORD, IL
- Flight plan: IFR
- Airport: MSN, Madison, runway 18, 9,005 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; airline transport, flight engineer; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left

## Weather

- Conditions: Visual (VMC), Day
- Wind: 190° at 10 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 91 °F, dew point 73 °F
- Altimeter: 29.00 inHg
- Observed at: MSN

## 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 19840829055139I](https://openairdocs.org/incident/19840829055139I), Aug 29, 1984: Boeing 737291, Madison, WI, Minor damage. NR1 engine failed during climb after takeoff. Final stage turbine blades broke and exited rear of engine.

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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