# NTSB LAX93LA142: Champion 7EC, N9099B, Riverside, CA, March 7, 1993

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: March 7, 1993, 14:05 local (22:05 UTC)
- Place: Riverside, CA
- Coordinates: 33.899147, -117.399627 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=33.8991&lon=-117.3996&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report November 15, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 27942
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX93LA142
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/27942/pdf
- Page: https://openairdocs.org/ntsb/LAX93LA142

## Probable cause

THE CFI'S INADEQUATE SUPERVISION OF THE FLIGHT, THE DUAL STUDENT'S FAILURE TO MAINTAIN DIRECTIONAL CONTROL AND IMPROPER USE OF THE NORMAL BRAKES. CONTRIBUTING TO THIS ACCIDENT WAS THE DUAL STUDENT'S IMPROPER USE OF THE RUDDER.

## Sequence of events

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

- Loss of control - on ground/water, landing - flare/touchdown
  - supervision - inadequate, pilot in command(cfi) (cause)
  - directional control - not maintained, dual student (cause)
  - rudder - improper use of, dual student (contributing factor)
- Nose over, landing - roll
  - brakes(normal) - improper use of, dual student (cause)

## Analysis

THE CERTIFICATED AIRLINE TRANSPORT PILOT/FLIGHT INSTRUCTOR DUAL STUDENT WAS RECEIVING A CHECK OUT IN THE CONVENTIONAL GEAR EQUIPPED AIRPLANE.  ON TOUCHDOWN THE AIRPLANE SWERVED TO THE LEFT. THE DUAL STUDENT OVER-CORRECTED THE LEFT EXCURSION AND THEN OVER-CORRECTED THE RESULTING RIGHT EXCURSION AND APPLIED HARD BRAKING. THE AIRPLANE NOSED OVER ONTO ITS BACK.

## Aircraft

- Registration: [N9099B](https://openairdocs.org/aircraft/N9099B), registered now, S/N 7EC-648, built 1958 (OpenAirDocs)
- Reported make and model: CHAMPION 7EC
- Registry model: [Champion 7EC](https://openairdocs.org/model/champion-7ec) (registry code 21101NM) (OpenAirDocs)
- Registry engine: [Continental C90 series](https://openairdocs.org/engine/continental-c90-series) (registry code 17009, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 7EC-648
- Airframe hours: 3754
- Engines: CONTINENTAL O-200-A 100 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Operator: Rogers, David M.
- Registered owner: Rogers, David M.
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, January 5, 1993, 13 hours before
- Departed: CNO, CHINO, CA
- Airport: RAL, Riverside Municipal, runway 27, 5,400 × 100 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 62; flight instructor, commercial; airplane ratings: single-engine sea, multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: rear; flight hours: 13,772 total, 260 in this make and model, 13,414 as pilot in command, 124 in the last 90 days, 40 in the last 30 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 270° at 4 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 64 °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 19930307004399A](https://openairdocs.org/incident/19930307004399A), Mar 7, 1993: Bbavia 7EC, Riverside, CA, Substantial damage. Student overcorrected swerve on landing roll then hit brakes. Aircraft nosed over.

## Other investigations on N9099B (2)

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.

- [NTSB LAX79FUG11](https://openairdocs.org/ntsb/LAX79FUG11), Jan 7, 1979: Champion 7EC (N9099B), Upland, CA, substantial damage
- [NTSB UNK64X3326](https://openairdocs.org/ntsb/UNK64X3326), Aug 11, 1964: Champion 7EC (N9099B), Mercury, NV, substantial damage

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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