# NTSB MKC90LA084: Aeronca 7AC, N84055, Branson, MO, April 12, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: April 12, 1990, 09:30 local (14:30 UTC)
- Place: Branson, MO
- Coordinates: 36.640823, -93.239463 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=36.6408&lon=-93.2395&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 28, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 34959
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC90LA084
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34959/pdf
- Page: https://openairdocs.org/ntsb/MKC90LA084

## Probable cause

A DISCONNECTED THROTTLE LINKAGE THAT WAS INADEQUATELY INSPECTED.

## Sequence of events

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

- Loss of engine power(partial) - mech failure/malf, cruise - normal
  - throttle/power lever,linkage - disconnected (cause)
  - maintenance,annual inspection - inadequate, company maintenance personnel (cause)
- Forced landing, descent - emergency
- On ground/water encounter with terrain/water, landing - flare/touchdown
  - terrain condition - rough/uneven

## Analysis

THE PILOT EXPERIENCED A PARTIAL LOSS OF ENGINE POWER WHILE IN CRUISE FLIGHT. AT FIRST IT WAS A GRADUAL LOSS OF POWER FINALLY TERMINATING AT IDLE RPM. UNABLE TO REACH THE AIRPORT THE PILOT SELECTED A FIELD THAT WAS ROUGH AND UNEVEN. THE AIRCRAFT IMPACTED THE GROUND AND WAS DAMAGED. A POST-IMPACT EXAM OF THE AIRCRAFT REVEALED A DISCONNECTED THROTTLE LINKAGE. AN ANNUAL INSPECTION OF THE AIRCRAFT HAD BEEN PERFORMED JUST 2 HOURS PREVIOUS TO THE OCCURRANCE.

## Aircraft

- Registration: N84055 (not matched to a registry record)
- Reported make and model: AERONCA 7AC
- Category: Airplane
- Serial number: 30586
- Airframe hours: 2928
- Engines: CONTINENTAL A-65-8 65 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: College Of The Ozarks
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, April 10, 1990, 2 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 28; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 377 total, 85 in this make and model, 315 as pilot in command, 19 in the last 90 days, 7 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 270° at 5 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 48 °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).

- [Incident 19900412018659I](https://openairdocs.org/incident/19900412018659I), Apr 12, 1990: Bbavia 7AC, Branson, MO, Minor damage. Unable to control RPM. Forced landing. Found throttle control rod disconnected from throttle arm on carburetor.

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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