# NTSB CHI84IA252: Fairchild SA-227-TT, N2GL, Pontiac, MI, June 13, 1984

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: June 13, 1984, 11:20 local (15:20 UTC)
- Place: Pontiac, MI
- Location: 42.6492° N, 83.2874° W: Placed by OpenAirDocs: center of Pontiac, MI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=42.6492&lon=-83.2874&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 9 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 12453
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI84IA252
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/12453/pdf
- Page: https://openairdocs.org/ntsb/CHI84IA252

## Sequence of events

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

- Airframe/component/system failure/malfunction, descent - normal
  - flt control syst,horiz stab drive - worn (cause)

## Analysis

THE AIRCREW NOTICED A 'NOSE UP' PITCH CHANGE DURING DESCENT AT ABOUT THE TIME THEY WERE LEVELING TO SLOW FOR THE ARPT PATTERN & TRAFFIC. THE PLT REPORTED THAT FULL FORWARD YOKE PRESSURE WAS REQUIRED TO STOP THE NOSE UP CONDITION. THE ACFT WAS LANDED WITHOUT FURTHER INCIDENT. AN INVESTIGATION REVEALED THAT THE OCCURRENCE WAS CAUSED BY A WORN HORIZONTAL STABILIZER TRIM ACTUATOR, P/N DL5040M2-4.

## Aircraft

- Registration: [N2GL](https://openairdocs.org/deregistered/N2GL-2019-01-29), registration cancelled 2019-01-29, S/N TT-426 (OpenAirDocs)
- Reported make and model: FAIRCHILD SA-227-TT
- Registry model: [Swearingen SA227-TT](https://openairdocs.org/model/swearingen-sa227-tt) (registry code 8780620) (OpenAirDocs)
- Category: Airplane
- Serial number: TT-426
- Airframe hours: 1187
- Engines: AIRESEARCH TPE 331 900 horsepower turbo prop
- Damage: No damage
- Flight: Executive/Corporate, Part 91
- Registered owner: Amca International
- Airworthiness certificate: Standard, Normal
- Departed: JVL, JANESVILLE, WI
- Flight plan: IFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 38; airline transport; airplane ratings: multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: right; flight hours: 5,000 total, 2,000 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 290° at 8 knots
- Visibility: 7 statute miles
- Lowest ceiling: 12,000 ft broken
- Temperature: 88 °F, dew point 72 °F
- Altimeter: 30.00 inHg
- Observed at: DET, 20 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 19840613045839I](https://openairdocs.org/incident/19840613045839I), Jun 13, 1984: Swrngn SA227TT, Pontiac, MI. Pitch up occurred at level out to slow for traffic pattern. Horizontal stabilizer trim actuator removed and replaced

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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