ASN logo
ASN Wikibase Occurrence # 42720
Last updated: 23 March 2019
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information. If you feel this information is incomplete or incorrect, you can submit corrected information.

Date:21-AUG-1987
Time:07:36
Type:Silhouette image of generic B06 model; specific model in this crash may look slightly different
Bell 206B JetRanger
Owner/operator:Stuart Aviation
Registration: N83080
C/n / msn: 900
Fatalities:Fatalities: 3 / Occupants: 4
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Category:Accident
Location:Washington, DC -   United States of America
Phase: En route
Nature:Survey
Departure airport:Washington, DC (DCA)
Destination airport:
Investigating agency: NTSB
Narrative:
THE HELICOPTER WAS ON A LCL PHOTOGRAPHY (SIGHT-SEEING) flight. WHILE HOVERING AT APRX 200' ABV THE POTOMAC RIVER, THE ENG LOST PWR. THE PLT INITIATED AN AUTOROTATION & DEPLOYED THE EMERG FLOATS. SUBSEQUENTLY, THE HELICOPTER IMPACTED IN THE RIVER & ROLLED over , BUT WAS SUPPORTED (UPSIDE DOWN) IN THE WATER BY THE FLOATS. AFTER RECOVERY, NO PREIMPACT PART FAIL- URE OR MALFUNCTION OF THE AIRFRAME WAS FND. HOWEVER, A TEARDOWN OF THE ENG REVEALED THE SPUR ADAPTER GEARSHAFT (SAG), PN 6890482, HAD FAILED FROM WEAR & SUBSEQUENT FATIGUE. THE FAILURE OCCURRED AT THE FWD, SPLINED END OF THE SAG. DEBRIS (82% SILICON) WAS FND INSIDE THE OIL DELIVERY TUBE. THE OIL JETS FOR THE #2 & #3 BRGS WERE OBSTRUCTED, BUT THE JET FOR SAG WAS NOT OBSTRUCTED. THE PRECISE NATURE OF THE CONDS & CIRCUMSTANCES THAT LED TO EXCESSIVE WEAR WAS NOT DETERMINED. THE HEIGHT/VELOCITY DIAGRAM IN THE FLT MANUAL SHOWED HOVERING FLT BTN 10 & 400 FT SHOULD BE AVOIDED (TO ALLOW FOR SUCCESSFUL AUTOROTATIVE LNDG IN THE EVENT OF A PWR LOSS). Photographer William Weems (44) killed. Pilot jumped from the helicopter before impact.

Sources:

http://www.ntsb.gov/aviationquery/brief.aspx?ev_id=20001213X31729
Hamburger Abendblatt 22.08.1987, p32


Revision history:

Date/timeContributorUpdates
24-Oct-2008 10:30 ASN archive Added
05-Apr-2013 16:32 TB Updated [Nature, Source, Narrative]
21-Dec-2016 19:24 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]

Corrections or additions? ... Edit this accident description