# NTSB FTW84FA335: Rockwell 690B, N81865, Fort Worth, TX, August 2, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Field investigation · Final report
- Date: August 2, 1984, 15:20 local (20:20 UTC)
- Place: Fort Worth, TX
- Coordinates: 32.819923, -97.360786 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=32.8199&lon=-97.3608&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 21140
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW84FA335
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/21140/pdf
- Page: https://openairdocs.org/ntsb/FTW84FA335

## Sequence of events

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

- Main gear collapsed, landing - roll
  - gear retraction - inadvertent, pilot in command (cause)

## Analysis

THE ACFTS RIGHT MAIN LANDING GEAR RETRACTED DURING LANDING ROLL. DURING INITIAL EXAMINATION OF THE GEAR BY FAA IT WAS NOTED THAT ONE OF THE TWO CLEVIS FITTINGS HAD SEPARATED FROM THE GEAR CASTING. IT REMAINED ATTACHED TO THE ROD END BEARING ON THE PUSH/PULL ROD OF THE EXTEND/RETRACT CYLINDER. TWO PERSONS PUSHING ON THE LANDING GEAR DRAG BRACE ATTEMPTED TO UNLOCK THE SYSTEM. THEY WERE UNSUCCESSFUL. THE DOWNLOCK NITROGEN CHARGE WAS BLED OFF AND THEN ONE PERSON COULD PUSH THE DRAG BRACE ENOUGH TO ACTIVATE THE GEAR LIGHT AND HORN IN THE COCKPIT. AFTER THE OTHER DOWNLOCK DEVICES INTHE FORM OF BUNGER CORDS WERE REMOVED, LIGHT PRESSURE ON THE DRAG LINK ACTIVATED THE UNSAFE LIGHT AND HORN. THIS ACTION TOOK PLACE AFTER 1/8 INCH MOVEMENT OF THE DRAG BRACE. ONE INCH MOVEMENT WAS NECESSARY TO 'UNLOCK' THE GEAR FOR RETRACTION. THE DRAG BRACE WAS EXAMINED FOR EVIDENCE OF SOME OBJECT HAVING HIT IT WITH ENOUGH FORCE TO UNLOCK IT. DURINGLANDING. NO SUCH EVIDENCE WAS FOUND.

## Aircraft

- Registration: N81865 (not matched to a registry record)
- Reported make and model: Rockwell 690B
- Category: Airplane
- Serial number: 11510
- Airframe hours: 1462
- Engines: Airesearch TPE331-5-251K 718 horsepower turbo prop
- Damage: Substantial damage
- Flight: Business, Part 91
- Operator: Interjet
- Registered owner: Mckamy Aero Sales
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, July 25, 1984, 2 hours before
- Departed: DAL, DALLAS, TX
- Airport: FTW, Meacham, runway 16L, 7,500 × 150 ft, concrete

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 41; private, airline transport, commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 6,210 total, 1,810 in this make and model, 5,860 as pilot in command, 88 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 140° at 6 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 90 °F, dew point -0 °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).

- [Accident 19840802038129A](https://openairdocs.org/incident/19840802038129A), Aug 2, 1984: Gulstm 690B, Fort Worth, TX, Substantial damage. Right main landing gear collapsed on the landing roll. Found check nut loose on actuator rod. Rod snapped off.

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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