# NTSB FTW93LA148: Rockwell S-2R, Lookeba, OK, May 4, 1993

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: May 4, 1993, 09:00 local (14:00 UTC)
- Place: Lookeba, OK
- Coordinates: 35.359752, -98.360717 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=35.3598&lon=-98.3607&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report May 17, 1994
- Report: Approved by Office Director
- NTSB case key (mKey): 18742
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW93LA148
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/18742/pdf
- Page: https://openairdocs.org/ntsb/FTW93LA148

## Probable cause

THE LOSS OF ENGINE POWER FOR UNDETERMINED REASONS. FACTORS WERE THE SMOKE IN THE COCKPIT AND LOSS OF OUTSIDE VISUAL REFERENCE.

## Sequence of events

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

- Loss of engine power, maneuvering - aerial application
  - reason for occurrence undetermined, pilot in command (cause)
- Forced landing, descent - emergency
- In flight collision with object, descent - emergency
  - fuselage,crew compartment - smoke (contributing factor)
  - clearance - not possible, pilot in command
  - visual lookout - not possible, pilot in command (contributing factor)

## Analysis

DURING SPRAYING OPERATIONS THE PILOT EXPERIENCED A POWER LOSS AND THE COCKPIT FILLED WITH SMOKE. AFTER THE LOSS OF OUTSIDE REFERENCES AND ENGINE POWER THE AIRPLANE DESCENDED UNCONTROLLABLY AND STRUCK A TELEPHONE POLE, FOLLOWED BY FURTHER DESCENT TO GROUND IMPACT. THE SMOKE SOURCE AND REASON FOR THE LOSS OF ENGINE POWER WAS UNDETERMINED.

## Factual narrative

On May 4, 1993, at 0900 central daylight time, a Rockwell       S-2R, N424OX, was substantially damaged while maneuvering near      Lookeba, Oklahoma. The commercial pilot, also the owner/operator,      sustained minor injuries. Visual meteorological conditions      prevailed.

During an interview with the pilot, conducted by a Federal      Aviation Administration (FAA) inspector, he stated that he had      completed a spray run and was maneuvering for the next pass when      the cockpit filled with smoke and the engine lost power. He      further reported that after he lost engine power his right wing      struck a telephone pole and he descended uncontrollably to ground      impact. The operator was unable to determine why the engine lost      power. As a result of a bankruptcy proceeding the was removed      from the warehouse and could not be located for additional      inspection.

## Aircraft

- Registration: N424OX (not matched to a registry record)
- Reported make and model: ROCKWELL S-2R
- Category: Airplane
- Serial number: 2014R
- Airframe hours: 8165
- Engines: P&W R-1340 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: Guest, Steve R.
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, June 15, 1992, 108 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 43; commercial, flight instructor; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: center; flight hours: 17,000 total, 5,000 in this make and model, 16,720 as pilot in command, 100 in the last 90 days, 50 in the last 30 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 180° at 5 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 64 °F

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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