# NTSB FTW88DPJ13: Nord 1101, N5337M, Ardmore, OK, September 24, 1988

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Final report
- Date: September 24, 1988, 14:30 local (19:30 UTC)
- Place: Ardmore, OK
- Coordinates: 34.189285, -97.109382 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=34.1893&lon=-97.1094&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 2 serious
- Status: Completed, report January 24, 1990
- Report: Approved by Office Director
- NTSB case key (mKey): 22463
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW88DPJ13
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/22463/pdf
- Page: https://openairdocs.org/ntsb/FTW88DPJ13

## Sequence of events

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

- Airframe/component/system failure/malfunction, takeoff - initial climb
  - propeller system/accessories - underspeed (cause)
  - propeller system/accessories,electric pitch ctl - improper (cause)
- Loss of control - in flight, takeoff - initial climb
  - stall - inadvertent, pilot in command (cause)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

IMMEDIATELY AFTER LIFTOFF, THE AIRPLANE ABRUPTLY TURNED LEFT, NOSED DOWN, AND STRUCK THE GROUND. EXAMINATION OF THE ELECTRICAL PITCH CONTROL OF THE PROPELLER REVEALED THE PROPELLER BLADES TO BE IN THE HIGH PITCH, LOW RPM POSITION. DUE TO EXTREME DAMAGE OF THE SYSTEM, IT COULD NOT BE DETERMINED WHY THE PROPELLER PITCH HAD CHANGED ON TAKEOFF. NEITHER THE PLT NOR PAX COULD REMEMBER THE ACC. WITNESSES STATED THAT THE PROP NOISE CHANGED AFTER TAKEOFF AND THE ACFT GAINED VERY LITTLE ALT PRIOR TO THE LEFT TURN.

## Aircraft

- Registration: [N5337M](https://openairdocs.org/deregistered/N5337M-2019-12-20), registration cancelled 2019-12-20, S/N 167, built 1950 (OpenAirDocs)
- Reported make and model: Nord (SNCAN) 1101
- Registry model: [Nord 1101](https://openairdocs.org/model/nord-1101) (registry code 6380108) (OpenAirDocs)
- Registry engine: [Renault 6Q10B](https://openairdocs.org/engine/renault-6q10b) (registry code 52501, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 167
- Airframe hours: 1686
- Engines: RENAULT 6-10A 230 horsepower reciprocating
- Damage: Substantial damage
- Fire: On-Ground
- Flight: Personal, Part 91
- Operator: Charles D. Venters
- Registered owner: David M Boyd
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, May 4, 1988, 6 hours before
- Departed: IFO, ARDMORE, OK
- Airport: 1FO, Ardmore Downtown, runway 35, 5,000 × 75 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 55; commercial; airplane ratings: multi-engine land, single-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 9,000 total, 2 in this make and model, 9,000 as pilot in command, 75 in the last 90 days, 25 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 310° at 8 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 75 °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 19880924040189A](https://openairdocs.org/incident/19880924040189A), Sep 24, 1988: Nord 1101, Ardmore, OK, Substantial damage. Engine was heard to slow down on climbout. Plane stalled fell off on wing and crashed. Believe electric prop defect

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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