# NTSB FTW90IA085: Cessna Citation SII, N570RC, Dallas, TX, March 21, 1990

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: March 21, 1990, 14:50 local (20:50 UTC)
- Place: Dallas, TX
- Coordinates: 32.789569, -96.799385 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=32.7896&lon=-96.7994&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 4 uninjured
- Status: Completed, report December 30, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 23053
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW90IA085
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/23053/pdf
- Page: https://openairdocs.org/ntsb/FTW90IA085

## Probable cause

IMPROPER INSTALLATION OF THE AIR CONDITIONING UNIT, WHICH RESULTED IN AN ELECTRICAL SHORT WHICH CAUSED SEPARATION OF AN ELEVATOR CONTROL CABLE.

## Sequence of events

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

- Airframe/component/system failure/malfunction, cruise
  - air cond/heating/pressurization - shorted (cause)
  - flight control,elevator - separation (cause)
  - maintenance,installation - improper, other maintenance personnel (cause)

## Analysis

DURING A DESCENT THROUGH 14,000 FEET THE PILOT TURNED THE AIR CONDITIONING UNIT ON. IMMEDIATELY AFTER TURNING ON THE AIR CONDITIONING UNIT THE PILOT REPORTED UNCOMMANDED AIRPLANE EXCURSIONS. THE PIC ANALYZED THE PROBLEM AND LANDED WITHOUT INCIDENT AT HIS DESTINATION. AN INSPECTION REVEALED THAT THE AIR CONDITIONING UNIT HAD SHORTED OUT AND SEVERED THE ELEVATOR CONTROL CABLE. THIS WAS THE FIRST OPERATION OF THE AIR CONDITIONING UNIT SINCE INSTALLATION.

## Aircraft

- Registration: N570RC (not matched to a registry record)
- Reported make and model: CESSNA CITATION SII (CITATION S)
- Category: Airplane
- Serial number: 0070
- Engines: P&W JT15D-4B 2500 lbs thrust turbo fan
- Damage: No damage
- Flight: Business, Part 91
- Operator: Rosewood Assets, Inc.
- Departed: ADF, NAPLES, FL
- Flight plan: IFR
- Airport: DAL, Dallas Love Field, runway 13L, 7,753 × 150 ft, concrete

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 33; flight instructor, airline transport; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; flight hours: 6,510 total, 1,450 in this make and model, 6,243 as pilot in command, 105 in the last 90 days, 36 in the last 30 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 170° at 15 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: -0 °F, dew point -0 °F
- Observed at: DAL

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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