# NTSB CHI85IA039: Rockwell NA-265-25, N97RE, Chicago, IL, November 5, 1984

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: November 5, 1984, 10:30 local (16:30 UTC)
- Place: Chicago, IL
- Location: 41.9731° N, 88.0054° W: Placed by OpenAirDocs from NTSB’s distance and direction from CHICAGO O'HARE INTL (ORD), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.9731&lon=-88.0054&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 10 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 12904
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI85IA039
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/12904/pdf
- Page: https://openairdocs.org/ntsb/CHI85IA039

## Sequence of events

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

- In flight encounter with weather, cruise
  - weather condition - icing conditions (contributing factor)
  - flight into known adverse weather - performed, pilot in command
  - anti-ice/deice system,wing - inadequate (cause)
  - wing - ice (cause)
- Altitude deviation,uncontrolled, cruise
  - remedial action - performed, pilot in command

## Analysis

ACFT CONTROL WAS TEMPORARILY LOST WHEN 36 DEGREES OF FLAPS WERE ADDED DUE TO ICE BUILD-UP BEHIND HEATED LEADING EDGE OF THE WING. RAISING THE FLAPS TO 20 DEGS ALLEVIATED THE CONTROL PROBLEM AND AN UNEVENTFUL LANDING WAS ACCOMPLISHED AT A HIGHER THAN NORMAL AIRSPEED. THE ACFT IS CERTIFIED FOR FLT INTO ICING CONDITIONS AND ALL ANTI-ICE SYSTEMS WERE ON AT THE TIME OF THIS INCIDENT. PLT REPORTS AT THE TIME MENTIONED ICING CONDITIONS RANGING FROM LIGHT RIME TO SEVERE CLEAR ICING. LIGHT RIME ICING WAS ALSO MENTIONED ON THE ATIS BROADCAST.

## Aircraft

- Registration: N97RE (not matched to a registry record)
- Reported make and model: Rockwell NA-265-25
- Category: Airplane
- Serial number: 46532
- Engines: AIRESEARCH TFE 731-3R1D 3700 lbs thrust turbo jet
- Damage: No damage
- Flight: Executive/Corporate, Part 91
- Registered owner: Reliance Electric Company
- Airworthiness certificate: Standard, Normal
- Departed: HOU, HOUSTON, TX
- Destination: ORD, CHICAGO, IL
- Flight plan: IFR
- Airport: ORD, O'Hare International, runway 27L, 10,141 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 11,100 total, 150 in the last 90 days, 50 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Day
- Wind: 330° at 11 knots
- Visibility: 9 statute miles
- Lowest ceiling: 2,000 ft overcast
- Temperature: 36 °F, dew point 30 °F
- Altimeter: 29.00 inHg
- Observed at: ORD, 5 nm away

## 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 19841105076409I](https://openairdocs.org/incident/19841105076409I), Nov 5, 1984: Rkwell NA26565, Chicago, IL. Extended full flaps while in icing conditions and had buffet. Landed faster than normal. Probable tail surface ice.

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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