# NTSB CHI87IA061: Nihon YS-11A-500, N906TC, Remmington, IN, January 13, 1987

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: January 13, 1987, 13:54 local (18:54 UTC)
- Place: Remmington, IN
- Coordinates: 40.759143, -87.150367 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.7591&lon=-87.1504&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report July 10, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 13662
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI87IA061
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/13662/pdf
- Page: https://openairdocs.org/ntsb/CHI87IA061

## Sequence of events

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

- Airframe/component/system failure/malfunction, maneuvering
  - procedures/directives - not followed, pilot in command (cause)
  - inattentive, pilot in command (contributing factor)
  - powerplant controls - improper use of, pilot in command (cause)
- Loss of engine power(total) - mech failure/malf, descent - emergency
  - turbine assembly - overtemperature
  - emergency procedure - attempted, pilot in command
  - propeller system/accessories,feathering system - engaged
  - propeller feathering - performed, pilot in command
- Forced landing, descent - emergency
- Gear not extended, landing - flare/touchdown
  - terrain condition - open field
  - wheels up landing - intentional, pilot in command (cause)
  - terrain condition - rough/uneven

## Analysis

THE FLIGHT CREW FAILED TO ADHERE TO APPROPRIATE PROCEDURES AND DIRECTIVES WHEN THEY FAILED TO SELECT THE HP COCK LEVERS TO THE HSWL (LOCK OUT) POSITION WHILE PERFORMING AN APPROACH TO LANDING STALL DURING A TRAINING/TEST FLIGHT. WHEN STALL RECOVERY WAS INITIATED, BOTH PROPELLERS 'HUNG UP' WHEN THE HIGH (CRUISE PITCH) STOPS OF EACH PROPELLER FAILED TO WITHDRAW. AS THE POWER LEVERS WERE ADVANCED, TURBINE GAS TEMPERATURES (TGT'S) EXCEEDED LIMITATIONS; THE LEFT PROPELLER AUTO-FEATHERED, THE RIGHT PROPELLER WAS LATER FEATHERED BY THE CAPTAIN. RESTART PROCEDURES WERE ATTEMPTED WITHOUT SUCCESS, AND A FORCED LANDING IN A PLOWED CORNFIELD ENSUED. EXAMINATION OF THE ENGINES REVEALED THAT THE TURBINES HAD BEEN 'SUBJECTED TO SEVERE (AND DESTRUCTIVE) THERMAL DEGRADATION DURING OPERATION' AS A RESULT OF THE PROPELLERS BEING CONSTRAINED DURING LOW SPEED OPERATIONS. TESTING OF THE RELAYS REVEALED THAT THE HIGH STOP WITHDRAWAL RELAY FOR THE RIGHT PROPELLER FUNCTIONED INTERMITTENTLY.

## Aircraft

- Registration: N906TC (not matched to a registry record)
- Reported make and model: NIHON YS-11A-500
- Category: Airplane
- Serial number: 2154
- Engines: Rolls-Royce MK542-105 2050 horsepower turbo prop
- Damage: Minor damage
- Flight: Instructional, Part 91
- Registered owner: Mid Pacific Airlines
- Airworthiness certificate: Standard, Normal; Standard, Transport
- Last inspection: Continuous airworthiness, January 13, 1987
- Departed: IND, INDIANAPOLIS, IN
- Destination: LAF, LAFAYETTE, IN
- Flight plan: IFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 34; flight instructor, airline transport, commercial; airplane ratings: multi-engine land, single-engine land, single-engine sea; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 3,913 total, 1,381 in this make and model, 3,400 as pilot in command, 56 in the last 90 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 190° at 6 knots
- Visibility: 7 statute miles
- Lowest ceiling: none
- Temperature: 41 °F, dew point 30 °F
- Altimeter: 29.00 inHg
- Observed at: LAF, 24 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).

- [Incident 19870113009789I](https://openairdocs.org/incident/19870113009789I), Jan 13, 1987: Nihon YS11A500, Remington, IN, Minor damage. Loud bang and both engines lost power during a practice landing configuration stall. Landed gear up in a cornfield.

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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