Crash-aerien 15 MAR 1989 d'un NAMC YS-11A-300F N128MP - Lafayette-Purdue University Airport, IN (LAF)

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Accident

Last updated: 20 May 2013

Statuts:	Enquête Officielle
Date:	15 MAR 1989
Heure:	07:26
Type/Sous-type:	NAMC YS-11A-300F
Compagnie:	Mid Pacific Airlines
Immatriculation:	N128MP
Numéro de série:	2139
Année de Fabrication:	1970
Heures de vol:	24088
Moteurs:	2 Rolls Royce 542-10J Dart
Equipage:	victimes: 2 / à bord: 2
Passagers:	victimes: 0 / à bord: 0
Total:	victimes: 2 / à bord: 2
Dégats de l'appareil:	Détruit
Conséquences:	Written off (damaged beyond repair)
Lieu de l'accident:	Lafayette-Purdue University Airport, IN (LAF) (Etats-Unis d'Amérique)
Phase de vol:	En approche (APR)
Nature:	Convoyage
Aéroport de départ:	Terre Haute-Hulman Field, IN (HUF/KHUF), Etats-Unis d'Amérique
Aéroport de destination:	Lafayette-Purdue University Airport, IN (LAF/KLAF), Etats-Unis d'Amérique

Détails:
The aircraft was on short finals (at 400 feet agl, 35deg flaps) when it suddenly pitched down, entering a steep descent. It partially recovered before impact with a dirt hill, 500 feet short of the Runway 28. Ice accretion on the horizontal stabilizer leading edge was found (0,50-0,75 inch).

PROBABLE CAUSE: "A loss of control due to the improper in-flight decisions by the crew and the undetected accumulation of ice on the leading edge of the horizontal stabilizer, during flight in a forward centre of gravity condition and exacerbated by the extension of full landing flaps. "

Sources:
» ICAO Adrep Summary 4/90 (#27)
» NTSB

Opérations de secours

NTSB issued 3 Safety Recommendations

Show all AD's and Safety Recommendations

Photos

Plan

Ce plan montre l'aéroport de départ ainsi que la supposé destination du vol. La ligne fixe reliant les deux aéroports n'est pas le plan de vol exact.
La distance entre Terre Haute-Hulman Field, IN et Lafayette-Purdue University Airport, IN est de 111 km (69 miles).

Les informations ci-dessus ne représentent pas l'opinion de la 'Flight Safety Foundation' ou de 'Aviation Safety Network' sur les causes de l'accident. Ces informations prélimimaires sont basées sur les faits tels qui sont connus à ce jour.

languages:

Issued: 24-SEP-1990	To: FAA	A-90-121
CONDUCT A DIRECTED SAFETY REVIEW OF THE NIHON YS-11 ICING CERTIFICATION TO INCLUDE THE EFFECTS OF FLAP EXTENSION AND FORWARD CG LOADING ON PITCH CONTROL WITH TAILPLANE ICE ACCUMULATION. (Closed - Acceptable Action)
Issued: 24-SEP-1990	To: FAA	A-90-122
AS AN INTERIM MEASURE TO THE COMPLETION OF THE DIRECTED SAFETY REVIEW, ISSUE AN EMERGENCY AIRWORTHINESS DIRECTIVE APPLICABLE TO YS-11 AIRPLANES THAT LIMITS THE USE OF FLAPS TO 20 DEGREES OR LESS FOR LANDING IN THE PRESENCE OF KNOWN ICING CONDITIONS. REQUIRE THAT A PLACARD BE INSTALLED AND THAT THE PILOT\'S OPERATIONAL HANDBOOK BE MODIFIED ACCORDINGLY. (Closed - Acceptable Action)
Issued: 24-SEP-1990	To: FAA	A-90-123
ISSUE AN AIR CARRIER OPERATION BULLETIN TO PRINCIPAL OPERATIONS INSPECTORS TO ADVISE YS-11 OPERATORS OF THE POTENTIAL FOR LOSS OF PITCH CONTROL OF THE AIRPLANE WHEN USING FLAPS GREATER THAN 20 DEGREES FOR LANDING WITH ICE ON THE TAILPLANE. (Closed - Acceptable Action)