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ASN Wikibase Occurrence # 43285
Last updated: 4 September 2020
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Date:08-FEB-1987
Time:15:30
Type:Silhouette image of generic H500 model; specific model in this crash may look slightly different
Hughes 369D
Owner/operator:Royal Helicopter
Registration: N1102U
C/n / msn: 100820D
Fatalities:Fatalities: 1 / Occupants: 5
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Category:Accident
Location:Honolulu, HI -   United States of America
Phase: Take off
Nature:Unknown
Departure airport:
Destination airport:
Investigating agency: NTSB
Narrative:
DRG TKOF climb , A LOUD NOISE OCCURRED AS 1 OF 5 MAIN ROTORS (MRB'S) & THE TAIL BOOM separated FM THE HELICOPTER (HEL). THE HEL THEN CRASHED & HIT A SUBMERGED REEF APRX 200' FM THE HELIPORT. AN EXAM OF THE FAILED MRB SHOWED ITS RETENTION STRAP ASSY(RSA), PN 369D21210-501, FAILED FM FATIGUE IN AN AREA OF CORROSION; 11 OF THE MRB'S 16 STRAP LAMINATES HAD PREEXISTING CRACKS. CORROSION WAS FND ON 78 OF 80 LAMINATES. THE MAINT HNDBK REQD THE RSA'S BE INSPECTED AT 25, 100 & 600 HR INTER- VALS. SVC INFO NOTICE (SIN) DN-77.1 RDMDD A 300 HR INSPN IF ANY CRACK OR LAMINATE FAILURE WAS FND DRG A 100 HR INSPN. AD'S 77-15-09R1 & 81-10-08 REQD INSPN W/I (BUT NOT OUTBRD OF) THE PITCH HOUSING. DRG 100 HR/AD INSPNS AFTER 1768 & 1839 HRS OF OPN, UP TO 3 CRACKS WERE FND IN LAMINATE LEGS, BUT THEIR LCTNS WERE NOT DOCUMENTED FOR LTR INSPN. HOWEVER, DRG 2 SUBSEQUENT 100 HR INSPNS BY ANOTHER MECH, NO CRACKED LAMINATES WERE NOTED. THE HEL HAD 2135 HRS OF OPN WHEN THE ACDNT OCCURRED. SVC INFO LTR DL-54 RCMDD A TRI-FLOW WASH PROC AFTER THE LAST FLT OF EACH DAY WHEN OPNG IN A MARINE ENVIRONMENT CAUSE:

Sources:

NTSB: http://www.ntsb.gov/ntsb/brief.asp?ev_id=20001213X30252

Safety recommendations:

Safety recommendation A-89-7 issued 8 March 1989 by NTSB to FAA


Revision history:

Date/timeContributorUpdates
24-Oct-2008 10:30 ASN archive Added
21-Dec-2016 19:24 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]

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