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ASN Wikibase Occurrence # 42719
Last updated: 19 August 2021
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Date:12-MAY-1986
Time:17:45
Type:Silhouette image of generic B06 model; specific model in this crash may look slightly different
Bell 206B JetRanger
Owner/operator:Lone Star Helicopters Inc
Registration: N27785
MSN: 2800
Fatalities:Fatalities: 2 / Occupants: 2
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Category:Accident
Location:Pine Spring, TX -   United States of America
Phase: Landing
Nature:Unknown
Departure airport:Pecos, TX
Destination airport:
Investigating agency: NTSB
Narrative:
THE HELICOPTER WAS ON A FLT TO A SITE NR GUADALUPE PASS, AN AREA KNOWN FOR ERRATIC & GUSTY WNDS. AS THE PLT WAS ON AN APCH TO A HI MEADOW (ELEV APRX 5460'), THE HELICOPTER ENTERED A DSCNT & CRASHED WELL SHORT OF THE INTENDED LNDG AREA. A WITNESS RPRTD THE MAIN ROTOR RPM SLOWED & THE ROTOR BLADES CONED PRIOR TO IMPACT. THERE WAS EVIDENCE THE HELICOPTER IMPACTED IN A LVL ATTITUDE & AT A HIGH RATE OF DSCNT. AN INV REVEALED THAT A COUPLING ON THE ENG-TO-MAIN TRANSMISSION DRIVE SHAFT HAD BECOME DISCONNECTED. THERE WAS EVIDENCE THAT THE MALE DRIVESHAFT COUPLING WAS NOT PROPERLY SECURED TO THE FLANGE ON THE MAIN ROTOR DRIVESHAFT'S ENG END. EIGHT DAYS PRIOR TO THE ACDNT, AN AIR COND SYS WAS INSTALLED ON THE HELICOPTER. THIS WOULD HAVE REQD THAT A DRIVE SHAFT COUPLING BE DISCONNECTED. THERE WAS EVIDENCE THAT THE SELF LOCKING NUTS WERE REUSED WHEN THE COUPLING WAS RECONNECTED. CAUSE:

Sources:

NTSB: http://www.ntsb.gov/ntsb/brief.asp?ev_id=20001213X33550


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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