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ASN Wikibase Occurrence # 37628
Last updated: 20 August 2018
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Date:02-JUN-1986
Time:21:42
Type:Silhouette image of generic MU2 model; specific model in this crash may look slightly different
Mitsubishi MU-2B-35
Owner/operator:Martinaire
Registration: N8CC
C/n / msn: 569
Fatalities:Fatalities: 1 / Occupants: 1
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Category:Accident
Location:Bartlett, TX -   United States of America
Phase: En route
Nature:Unknown
Departure airport:Austin, TX (AUS)
Destination airport:D/Fw Airport, TX (DFW)
Investigating agency: NTSB
Narrative:
ABOUT 6 MIN AFTER TAKEOFF, AT 2138:31 CDT, THE PLT RPRTD LEVEL AT 9000 FT MSL. AT 2140:17, HE TRANSMITTED THAT HE HAD TROUBLE & SAID HE COULD NOT CONTROL OR DISCONNECT THE AUTOPILOT (A/P) WHICH WAS CAUSING THE ACFT TO DESCEND. AT 2141:14,HE STATED HE WAS DESCENDING AT 6000 FT/MIN. ANOTHER COMPANY PLT IN ANOTHER ACFT ASKED IF HE COULD FIND THE BREAKER, MEANING THE A/P CIRCUIT BREAKER. AT 2141:27, THE PLT OF N8CC REPLIED, 'CALL YOU BACK.' SECONDS LATER, RADIO & RADAR CONTACT WITH N8CC WERE LOST. A SEARCH WAS INITIATED, BUT THE ACFT WAS NOT FND UNTIL THE FOLLOWING MORNING. AN EXAM REVEALED THE ACFT IMPACTED IN A STEEP, NOSE DOWN, INVERTED ATTITUDE WHILE AT HIGH SPEED; MUCH OF THE WRECKAGE WAS BURIED. NO PREIMPACT PART FAILURE/MALFUNCTION WAS FND. WITH THE A/P ENGAGED, BACK PRESSURE ON THE CONTROL COLUMN WOULD HAVE CAUSED THE A/P TO TRIM NOSE DOWN. SUBSEQUENTLY, THE MANUFACTURER ISSUED A PRECAUTIONARY ADVISORY TO ALL MU-2 OWNER/OPERATORS REGARDING PROPER OPERATION OF THE A/P AND THE VARIOUS WAYS IN WHICH IT CAN BE DISENGAGED. CAUSE:

Sources:

NTSB: https://www.ntsb.gov/ntsb/brief.asp?ev_id=20001213X33895

Safety recommendations:

Safety recommendation A-86-132 issued 9 January 1986 by NTSB to FAA
Safety recommendation A-86-133 issued 9 January 1986 by NTSB to FAA
Safety recommendation A-86-134 issued 9 January 1986 by NTSB to FAA


Revision history:

Date/timeContributorUpdates
24-Oct-2008 10:30 ASN archive Added
21-Dec-2016 19:23 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]

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