# NTSB CHI92LA139: Piper PA-28-140D, N1814T, Markham, IL, May 2, 1992

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: May 2, 1992, 14:40 local (19:40 UTC)
- Place: Markham, IL
- Coordinates: 41.600578, -87.64933 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=41.6006&lon=-87.6493&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report March 9, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 15437
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI92LA139
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/15437/pdf
- Page: https://openairdocs.org/ntsb/CHI92LA139

## Probable cause

THE RESULT OF AN INADEQUATE ANNUAL INSPECTION BY OTHER MAINTENANCE PERSONNEL AND, AS A RESULT, A TOTAL FAILURE OF THE THROTTLE LINKAGE. A FACTOR WAS THE PILOT OVERSHOT HIS INTENDED EMERGENCY LANDING AREA, DUE TO EXCESSIVE SPEED.

## 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
  - throttle/power lever,linkage - failure,total (cause)
  - maintenance,annual inspection - inadequate, other maintenance personnel (cause)
  - throttle/power control - unavailable, pilot in command
- Forced landing, descent - emergency
  - emergency procedure - performed, pilot in command
  - remedial action - performed, pilot in command
- In flight collision with terrain/water, landing - flare/touchdown
  - terrain condition - berm
  - airspeed - excessive, pilot in command (contributing factor)

## Analysis

THE LIGHT SINGLE-ENGINED AIRPLANE HAD DESCENDED TO A NEW ALTITUDE.  THE PILOT ADVANCED THE THROTTLE WITH THE INTENT OF OBTAINING CRUISE POWER. THE ENGINE DID NOT RESPOND TO THE POWER APPLICATION.  IT REMAINED AT THE PREVIOUSLY SET IDLE RPM AND BEGAN GRADUALLY LOOSING THE RPM.  THE PILOT CHOSE A FLAT AREA ADJACENT TO A POND FOR THE FORCED LANDING.  THE PILOT STATED HE DID NOT TOUCH DOWN ON THE FLAT AREA BECAUSE THE AIRPLANE'S AIRSPEED WAS TOO FAST.  THE AIRPLANE TOUCHED DOWN ON THE RIDGE THAT WAS AT THE END OF THE FLAT AREA AND WAS SUBSTANTIALLY DAMAGED.  AN ON SCENE INVESTIGATION REVEALED THE THROTTLE ROD END BEARING WAS NOT ATTACHED TO THE THROTTLE RACKET.  THE ATTACHING BOLT WAS MISSING.  BOTH COMPONENTS WERE COMPLETELY SEPARATEED RATHER THAN ATTACHED.

## Aircraft

- Registration: [N1814T](https://openairdocs.org/deregistered/N1814T-1992-08-03), registration cancelled 1992-08-03, S/N 287125166 (OpenAirDocs)
- Reported make and model: PIPER PA-28-140D
- Registry model: [Piper PA-28-140](https://openairdocs.org/model/piper-pa-28-140) (registry code 7102802) (OpenAirDocs)
- Category: Airplane
- Serial number: 28-7125166
- Airframe hours: 6376
- Engines: LYCOMING O-320-E2A 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Jan J. Toof/John Flannery
- Registered owner: Jan J. Toof/John Flannery
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, February 6, 1992, 25 hours before
- Departed: 50I, KENTLAND, IN
- Destination: MDW, CHICAGO, IL

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 23; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 327 total, 318 in this make and model, 280 as pilot in command, 12 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 290° at 15 knots
- Visibility: 20 statute miles
- Lowest ceiling: 10,000 ft overcast
- Temperature: 72 °F, dew point 41 °F
- Altimeter: 29.00 inHg
- Observed at: MDW, 11 nm away

## 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 19920502013169A](https://openairdocs.org/incident/19920502013169A), May 2, 1992: Piper PA28140, Markham, IL, Substantial damage. Engine lost partial power. Nosed up. Landed on upslope. Throttle became disconnected at carb. Bolt hole elongated.

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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