Mitsubishi MU-2B-25 N66U

Summary

On 12 September 1982 at about 19:28 local time, a Mitsubishi MU-2B-25 registered N66U, operated by PAT Griffin Company, was involved in an accident near Hayden, Colorado, United States. 6 people were on board and 6 died. The aircraft was destroyed. No probable cause statement is available for this record.

Date

12 September 1982 at 19:28

Classification

Accident

Location

Hayden, Colorado, United States

Nearest airport

Yampa Valley (HDN)

Coordinates

40.4793, -107.2600

Aircraft

Mitsubishi MU-2B-25

Registration

N66U

Category

Airplane

Engines

2

Operator

PAT Griffin Company

Operating rule

Part 91: General Aviation

Purpose of flight

Business

Phase of flight

Not recorded

Route

Fort Collins → Fort Collins

Aircraft damage

Destroyed

Weather

VMC

Light

Day

NTSB number

DEN82AA191

6 people died.

The NTSB has not published a probable cause for this record. No probable cause statement is present in the source data.

Nothing about the cause is stated here that is not in the source record.

Read the full NTSB narrative

A MAINT SUPERVISOR & 2 PLTS NOTED THAT THE L ENG DID NOT RESPOND NORMALLY WHILE BEING STARTED. AFT STARTING, THE PLT TAXIED TO RWY 10 FOR AN IFR DEPARTURE. SINCE THE TWY DID NOT EXTEND TO THE END OF THE RWY, THE PLT OF ANOTHER ACFT WAITED ON THE TWY, JUST SHORT OF THE RWY, APRX 2967 FT FROM THE END. HE OBSD SMOKE COMING FROM THE L ENG OF THE MU-2 & REPORTED THIS INFO ON THE UNICOM FREQ. HE REPORTED THAT THE MU-2 CONTD & ROTATED FOR TKOF APRX 200 TO 250 YDS EAST OF HIS PSN. RPRTDLY, THE ACFT CLIMBED TO APRX 300-400 FT AFL, THEN TURNED LEFT TWD HIGHER TERRAIN. AFTER TURNING, IT ENTER WHAT 2 WITNESSES DESCRIBED AS A VMC ROLL, THEN CRASHED & BURNED. AN EXAM OF THE AIRFRAME REVEALED NO PREIMPACT MECHANICAL FAILURES. A TEARDOWN OF THE L ENG REVEALED THAT A TURBINE BEARING, PN 3101092-1, HAD BEEN MISALIGNED & SUBSEQUENTLY BEGAN TO FAIL, DAMAGING THE 2ND & 3RD STAGES OF THE TURBINE SECTION. THE ARPT ELEV WAS 6597 FT. THE COMPUTED TKOF ROLL WAS 1620 FT & THE COMPUTED ACCELERATE-STOP DISTANCE WAS 3100 FT. THE LNDG GEAR & SEL, FND IN DWN PSN.

Quoted verbatim from the NTSB record.