# NTSB ATL88IA139: Boeing 727-225A, N889Z, Atlanta, GA, April 12, 1988

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: April 11, 1988, 21:35 local (Apr 12, 1988, 01:35 UTC)
- Place: Atlanta, GA
- Location: 33.6367° N, 84.4279° W: Placed by OpenAirDocs at HARTSFIELD/JACKSON ATLANTA INTL (ATL), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=33.6367&lon=-84.4279&mi=10
- Phase of flight: [Standing](https://openairdocs.org/ntsb-phases/150) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 83 uninjured
- Status: Completed, report January 25, 1990
- Report: Approved by Office Director
- NTSB case key (mKey): 7634
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL88IA139
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/7634/pdf
- Page: https://openairdocs.org/ntsb/ATL88IA139

## Sequence of events

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

- Airframe/component/system failure/malfunction, standing - pre-flight
  - landing gear,main gear - fractured (cause)
  - maintenance,overhaul - improper, company maintenance personnel (cause)

## Analysis

THE LEFT MLG OUTER CYLINDER MAIN TRUNNION FRACTURED AND SEPARATED WHILE THE AIRPLANE WAS SITTING AT THE GATE, SHORTLY BEFORE THE PLANNED DEPARTURE. SUBSEQUENT METALLURGICAL EXAM OF THE PART REVEALED THAT IT WAS IMPROPERLY OVERHAULED, WHICH SIGNIFICANTLY REDUCED THE LIFE OF THE PART.

## Aircraft

- Registration: N889Z (not matched to a registry record)
- Reported make and model: BOEING 727-225A
- Category: Airplane
- Serial number: 21858
- Airframe hours: 26282
- Engines: P&W JT8D 14500 lbs thrust turbo fan
- Damage: Minor damage
- Flight: Part 121
- Operator: Eastern Airlines Inc, doing business as Eastern Airlines
- Registered owner: Connecticut Bank & Trust Co.
- Airworthiness certificate: Standard, Transport
- Destination: MIA, MIAMI, FL
- Flight plan: IFR
- Airport: ATL, William B. Hartsfield

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 55; airline transport; airplane ratings: multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 1,000 in this make and model

## Weather

- Conditions: Visual (VMC), Night/dark
- Wind: 80° at 11 knots
- Visibility: 5 statute miles
- Lowest ceiling: 2,000 ft overcast
- Temperature: 54 °F, dew point 52 °F
- Altimeter: 29.00 inHg
- Observed at: ATL

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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