NTSB Identification: NYC85FA189.
The docket is stored on NTSB microfiche number 28977.
Nonscheduled 14 CFR
Accident occurred Friday, July 19, 1985 in ERIE, PA
Aircraft: Smith, Ted Aerostar AEROSTAR 601, registration: N71MA
Injuries: 2 Fatal.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

DURING A NORMAL IFR CRUISE FLIGHT, THE PILOT OF AIR OHIO FLIGHT 21, DID NOT RESPOND TO ATC INSTRUCTIONS. AIR OHIO FLIGHT 21 CONTINUED FOR 40 MINUTES WITH NO REPLY AND WITHOUT DEVIATION IN ALTITUDE OR HEADING UNTIL THE DISCRETE TARGET DISAPPEARED FROM RADAR OVER LAKE ERIE. THE PILOT HAD NOT SLEPT FOR APPROXIMATELY 30 HOURS PRIOR TO THE LOSS OF COMMUNICATION RESPONSE.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

RADIO COMMUNICATIONS..NOT MAINTAINED..PILOT IN COMMAND

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

INSTRUCTIONS,WRITTEN/VERBAL..NOT FOLLOWED..PILOT IN COMMAND

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

FATIGUE(LACK OF SLEEP)..PILOT IN COMMAND

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