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| Date: | Thursday 17 September 1998 |
| Time: | 20:33 LT |
| Type: |  ATR 42-300 |
| Owner/operator: | American Eagle Airlines |
| Registration: | N233RM |
| MSN: | 235 |
| Year of manufacture: | 1991 |
| Engine model: | P&W PW 120 |
| Fatalities: | Fatalities: 0 / Occupants: 16 |
| Other fatalities: | 0 |
| Aircraft damage: | None |
| Category: | Accident |
| Location: | Chicago, IL -
 United States of America
|
| Phase: | Approach |
| Nature: | Passenger - Scheduled |
| Departure airport: | Mosinee, WI (KCWA) |
| (KORD) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
Flight 146, an ATR-42 was approximately 18 miles from the airport on the ILS 09R approach when it encountered wake turbulence from a Flight 554, a Boeing 737-300, which was vectored onto the approach from the north in front of Flight 146. Radar data showed Flight 554 intercepted the localizer approximately 17.5 miles from the airport while descending from 5,200 feet to 4,800 feet. Flight 146 was at an altitude of about 4,900 feet when the wake turbulence encounter occurred. Separation of the two airplanes when the encounter occurred was approximately 4.8 miles. Vertical acceleration of Flight 146 varied from 2.3679 g's to .5542 g's during the encounter.
Probable Cause: the wake turbulence encountered by Flight 146.
Accident investigation:
 |
|
Sources:
NTSB CHI98LA351
History of this aircraft
Other occurrences involving this aircraft
| 20 November 1991 | N235RM | Simmons Airlines | 0 | Chicago, IL | |
non |
| 22 September 2019 | C-FJYW | Calm Air International | 0 | near Repulse Bay (CYUT), NU |  |
min |
| 14 October 2021 | C-FJYW | Calm Air International | 0 | near Baker Lake Airport, NU (YBK/CYBK) | |
non |
| 29 April 2023 | C-FJYW | Calm Air International | 0 | Arviat Airport, NU (YEK/CYEK) | |
min |
| Collision with person/animal. | ||||||
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 10-Mar-2024 10:29 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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