# NTSB CHI84IA301: Boeing 727-200, N464DA, Chicago, IL, July 16, 1984

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: July 16, 1984, 10:55 local (15:55 UTC)
- Place: Chicago, IL
- Location: 41.9769° N, 87.9081° W: Placed by OpenAirDocs at CHICAGO O'HARE INTL (ORD), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.9769&lon=-87.9081&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 91 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 12456
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI84IA301
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/12456/pdf
- Page: https://openairdocs.org/ntsb/CHI84IA301

## Sequence of events

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

- Airframe/component/system failure/malfunction, takeoff - roll/run
  - landing gear,main gear - fatigue (cause)
  - landing gear,main gear - failure,partial
  - maintenance,inspection - inadequate, pilot in command (cause)

## Analysis

THE #2 WHEEL ASSEMBLY SEPARATED FROM THE ACFT DURING TAKEOFF ROLL. FLT WAS DIVERTED TO ATLANTA, GA, WHERE AN UNEVENTFUL LANDING WAS MADE. INSPECTION REVEALED THE AXLE FAILURE OCCURRED AS A RESULT OF FATIGUE CRACK PROPAGATION OF NUMEROUS PRIOR CRACKS IN THE LOWER SURFACE OF THE INNER BEARING JOURNAL.

## Aircraft

- Registration: N464DA (not matched to a registry record)
- Reported make and model: BOEING 727-200
- Category: Airplane
- Serial number: 20646
- Engines: P&W JT8D-15 turbo jet
- Damage: Minor damage
- Flight: Part 121
- Registered owner: Delta Airlines, Inc.
- Airworthiness certificate: Standard, Transport
- Departed: ORD, CHICAGO, IL
- Destination: MSY, NEW ORLEANS, LA
- Flight plan: IFR
- Airport: ORD, O'Hare

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 44; airline transport; airplane ratings: multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 6,700 total, 2,500 in this make and model, 246 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 81 °F

## 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 19840716038799I](https://openairdocs.org/incident/19840716038799I), Jul 16, 1984: Boeing 727232, Chicago, IL, Minor damage. #2 Main landing gear wheel/tire assembly separated from airplane on takeoff roll. Found break in #2 axle.

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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