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Safety Recommendation Details

Safety Recommendation A-90-142
Details
Synopsis: ON OCTOBER 28, 1989, ABOUT 1837 HAWAIIAN STANDARD TIME, ALOHA ISLANDAIR, FLIGHT 1712, A DE HAVILLAND DHC-6-300, TWIN OTTER, N707PV, COLLIDED WITH MOUNTAINOUS TERRAIN WHILE EN ROUTE ON A SCHEDULED PASSENGER FLIGHT FROM THE KAHULUI AIR PORT, MAUI, HAWAII TO KAUNAKAKAI AIRPORT, MOLOKAI, HAWAII. THE FLIGHT WAS CONDUCTED UNDER VISUAL FLIGHT RULES (VFR) AND UNDER THE PROVISIONS OF 14 CFR PART 135.
Recommendation: THE NTSB RECOMMENDS THAT THE NATIONAL WEATHER SERVICE: REQUIRE THAT WEATHER FORECASTS NOTE THE POSSIBLE FORMATION OF OROGRAPHIC CLOUDS AND PRECIPITATION WHEN CONDITIONS EXIST THAT WOULD CREATE SUCH CLOUDS.
Original recommendation transmittal letter: PDF
Overall Status: Closed - Reconsidered
Mode: Aviation
Location: HALAWA,MOLOKAI, HI, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: DCA90MA005
Accident Reports: Aloha IslandAir, Inc., Flight 1712 DeHavilland Twin Otter, DHC-6-300, N707PV
Report #: AAR-90-05
Accident Date: 10/28/1989
Issue Date: 11/21/1990
Date Closed: 12/2/1991
Addressee(s) and Addressee Status: United States Department of Commerce, National Oceanic and Atmospheric Administration, National Weather Service (Closed - Reconsidered)
Keyword(s): Weather, Thunderstorms/Rain/Snow

Safety Recommendation History
From: NTSB
To: United States Department of Commerce, National Oceanic and Atmospheric Administration, National Weather Service
Date: 12/2/1991
Response:

From: United States Department of Commerce, National Oceanic and Atmospheric Administration, National Weather Service
To: NTSB
Date: 7/1/1991
Response: THE NWS STATES IT IS NOT ITS POLICY TO INDICATE CLOUD FORMATION MECHANISMS IN ANY FORECAST. THE EXISTENCE OF SUCH CLOUDS FORMATION MECHANISMS IN ANY FORECAST. THE EXISTENCE OF SUCH CLOUDS IS OPERATIONALLY MUCH MORE IMPORTANT THAN A POTENTIALLY ERRONEOUS FORMATION LABEL. THEY GO ON TO SAY THAT AT THE TIME OF THE ACCIDENT, THERE WAS NO INDICATION OR EXPECTATION OF INSTRUMENT METEOROLOGICAL CONDITIONS. THEY CONCLUDE BY STATING THEY HAVE DETERMINED THAT THE OBJECTIVE OF THE BOARD'S RECOMMENDATION IS ADEQUATELY ACCOMPLISHED BY EXISTING PROCEDURES AND NO OPERATIONAL IMPROVEMENT WOULD BE ACHIEVED BY THIS CHANGE.