# NTSB CHI84IA114: Beech 99, N313BA, Champaign, IL, February 22, 1984

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: February 22, 1984, 10:08 local (16:08 UTC)
- Place: Champaign, IL
- Coordinates: 40.10902, -88.240188 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.1090&lon=-88.2402&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 5 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 12444
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI84IA114
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/12444/pdf
- Page: https://openairdocs.org/ntsb/CHI84IA114

## Sequence of events

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

- Airframe/component/system failure/malfunction, approach
  - flight control,aileron attachment - disconnected (cause)
  - maintenance,installation - improper, company maintenance personnel (cause)

## Analysis

THE PLT REPORTED THAT DURING ARRIVAL TO THE DESTINATION ARPT, HE HEARD A LOUD BANG & THE ACFT BEGAN ROLLING TO THE RIGHT. HE REPORTED THAT HE WAS UNABLE TO CONTROL THE ROLL WITH THE AILERONS, SO HE REDUCED POWER ON THE LEFT ENG & APPLIED LEFT RUDDER. THE CREW WAS THEN ABLE TO MAINTAIN DIRECTIONAL CONTROL OF THE ACFT & MADE A SAFE LANDING. AFTER LANDING, THE LEFT AILERON WAS FOUND TO BE BENT AT THE 2ND HINGE POINT. AN INVESTIGATION REVEALED THAT ON 2/20/84, THE SCREWS ON THE OUTBOARD HINGE OF THE LEFT AILERON WERE IMPROPERLY INSTALLED. THIS ALLOWED THE OUTBOARD SECTION OF THE AILERON TO COME LOOSE.

## Aircraft

- Registration: [N313BA](https://openairdocs.org/deregistered/N313BA-1989-02-11), registration cancelled 1989-02-11, S/N U27 (OpenAirDocs)
- Reported make and model: BEECH 99
- Registry model: [Beech 99](https://openairdocs.org/model/beech-99) (registry code 1154002) (OpenAirDocs)
- Category: Airplane
- Serial number: U27
- Airframe hours: 27609
- Engines: P&W PT6A-20 550 horsepower turbo prop
- Damage: Minor damage
- Flight: Part 135
- Operator: Britt Airways, Inc.
- Registered owner: Britt Airways, Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: Continuous airworthiness, February 15, 1984, 14 hours before
- Departed: STL, ST. LOUIS, MO
- Destination: CMI, CHAMPAIGN, IL
- Flight plan: IFR
- Airport: CMI, Univ. Of Il-Willard, runway 4, 5,301 × 150 ft, concrete

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 26; airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 4,582 total, 1,161 in this make and model, 330 in the last 90 days, 5 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 330° at 12 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 48 °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 19840222038649I](https://openairdocs.org/incident/19840222038649I), Feb 22, 1984: Beech 99, Champaign, IL, Minor damage. Loud bang and a sudden roll to the right was controlled by power. Left aileron attach screws improperly installed.

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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