ASN Wikibase Occurrence # 40574
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| Date: | Friday 22 February 1991 |
| Time: | 16:19 LT |
| Type: |  Mitsubishi MU-2B-60 Marquise |
| Owner/operator: | Corp. Aviation Services, Inc. |
| Registration: | N274MA |
| MSN: | 786SA |
| Year of manufacture: | 1980 |
| Total airframe hrs: | 6094 hours |
| Engine model: | GARRETT TPE-331-10 |
| Fatalities: | Fatalities: 3 / Occupants: 3 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Tulsa International (TUL), OK -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Unknown |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
AIRPLANE WAS DEPARTING ON A REQUIRED MAINTENANCE TEST FLIGHT FOLLOWING REPLACEMENT OF BOTH ENGINES. WITNESSES STATED THAT THE TAKEOFF ROLL AND INITIAL CLIMB APPEARED NORMAL, BUT THAT AT ABOUT 500 FT AGL, THE AIRPLANE ENTERED A RIGHT BANK WHICH CONTINUED UNTIL THE WINGS WERE VERTICAL AND THE NOSE FELL THROUGH. AIRPLANE IMPACTED IN AN INVERTED STEEP NOSE DOWN ATTITUDE. EXAMINATION OF WRECKAGE REVEALED THAT THE RIGHT ENGINE HAD BEEN SECURED AND FEATHERED. SUBSEQUENT INVESTIGATION DID NOT REVEAL ANY EVIDENCE OF PRE-IMPACT FAILURE OR MALFUNCTION OF EITHER ENGINE OR ANY OF THE AIRFRAME SYSTEMS. ENGINE MOUNTING/RIGGING CONTINUITY COULD NOT BE ESTABLISHED DUE TO IMPACT DAMAGE. THE PILOT WAS A PRINCIPAL IN THE OPERATOR'S ORGANIZATION AND NOT ONE OF THE REGULAR LINE PILOTS. EVIDENCE INDICATED THAT THE GEAR WAS UP AND THAT THE LEFT SPOILER WAS DEPLOYED AT IMPACT. EMERG PROCEDURE TAUGHT IN TRANSITION TRAINING IS TO USE RUDDER TRIM AS SOON AS POSSIBLE AFTER ENG FAILURE TO PRECLUDE DEPLOYMENT OF SPOILERS. RUDDER TRIM FOUND IN NEUTRAL POSITION.
Probable Cause: THE SHUTDOWN OF ONE ENGINE FOR UNDETERMINED REASONS, AND THE PILOT'S FAILURE TO MAINTAIN VMCA DURING A CRITICAL PHASE OF FLIGHT. A FACTOR IN THE ACCIDENT WAS THE PILOT'S IMPROPER EMERGENCY PROCEDURE.
Accident investigation:
 |
|
Sources:
NTSB FTW91FA043
History of this aircraft
Other occurrences involving this aircraft
| 11 November 1982 | N274MA | International Jet Aviation Ser | 0 | Englewood, CO | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 04-Mar-2016 23:06 | Dr.John Smith | Updated [Operator, Location, Nature, Departure airport, Source, Narrative] |
| 21-Dec-2016 19:23 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 04-Aug-2017 14:36 | TB | Updated [Location, Source] |
| 21-Apr-2024 08:07 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Phase, Nature, Departure airport, Source, Narrative, Category, Accident report] |
Corrections or additions? ... Edit this accident description
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