NTSB Identification: MKC86FA179.
The docket is stored on NTSB microfiche number 32242.
Nonscheduled 14 CFR
Accident occurred Thursday, August 28, 1986 in TEXARKANA, AR
Probable Cause Approval Date: 06/07/1988
Aircraft: LOCKHEED 18-56 (HOWARD 250), registration: N252K
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.

WHILE APCHG FOR A LNDG, THE ACFT PITCHED UP, ROLLED INVERTED & IMPACTED THE TERRAIN TO THE LEFT OF THE RWY. NO PREIMPACTPART FAILURE/MALFUNCTION WAS FND; HOWEVER, AN INV REVEALED THE ACFT HAD BEEN LOADED WITH THE CENTER-OF-GRAVITY (CG) WELLBEHIND THE AFT LIMIT. THE ACFT HAD BEEN WEIGHED ON 9/8/84. LATER, ON 1/2/86, WEIGHT & BALANCE DATA HAD BEEN RECOMPUTED AFTER REMOVAL OF A RADAR & AN AUTOPLT, BUT AN ERROR HAD BEEN MADE DURING THE WEIGHT & BALANCE PREPARATION. SUBSEQUENTLY,THE ACFT WAS OPERATED IN A TAIL HEAVY CONDITION. WHETHER USING THE EXISTING OR THE CORRECT DATA, CALCULATIONS FOR THIS FLT SHOULD HAVE SHOWN THE CG WAS BEHIND THE AFT LIMIT. THE ELEV TRIM TAB WAS FND TRIMMED TO A FULL NOSE DOWN POSITION; 200 LBS OF BALLAST HAD BEEN INSTALLED IN THE VICINTY OF THE AFT CARGO DOOR. TESTS OF LUNG TISSUE SHOWED THE PLT & COPLT HAD ALCOHOL LVLS OF 0.044% & 0.171%, RESPECTIVELY. THE PLT'S URINE TESTED 0.035% FOR ALCOHOL. ALSO, PHENYLTOLOXAMINE, ACETAMINOPHEN & CHLORPHENIRAMINE (MEDICATIONS COMMONLY USED IN DECONGESTANTS/ANTIHISTAMINES) WERE DETECTED IN HIS URINE.

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

PLANNING/DECISION..IMPROPER

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

IMPAIRMENT(ALCOHOL)..PILOT IN COMMAND

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

IMPAIRMENT(ALCOHOL)..COPILOT/SECOND PILOT

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

AIRCRAFT WEIGHT AND BALANCE..IMPROPER

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

IMPROPER USE OF PROCEDURE..COMPANY/OPERATOR MANAGEMENT

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

IMPROPER USE OF PROCEDURE..PILOT IN COMMAND

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

IN-FLIGHT PLANNING/DECISION..IMPROPER..PILOT IN COMMAND

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

AIRCRAFT HANDLING..UNCONTROLLED


Index for Aug1986 | Index of months