S76 helicopter rotor blades hit an adjacent parked business jet during engine start at teb.

Attributes
ACN	584293
Time
Date	200306
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : teb.airport
State Reference	NJ
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : corporate
Make Model Name	S-76/S-76 Mark II
Operating Under FAR Part	Part 91
Flight Phase	ground : preflight ground : parked ground other : eng start
Flight Plan	None
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Global Express
Operating Under FAR Part	Part 91
Flight Phase	ground : parked
Person 1
Affiliation	company : corporate
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : multi engine pilot : atp
Experience	controller non radar : 1 controller radar : 1 flight time last 90 days : 90 flight time total : 10000 flight time type : 6000
ASRS Report	584293
Person 2
Affiliation	other
Function	other personnel other personnel
Events
Anomaly	conflict : ground critical ground encounters other non adherence : published procedure other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	other other other
Supplementary
Problem Areas	Company Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

Upon start of #1 engine on helicopter, rotor blades made contact with winglet of adjacent parked aircraft. During walkaround (preflight inspection), blade clearance appeared to be appropriate. During engine start, as blade began to turn and flex, thump was heard in cockpit, which was initially interpreted as 'droop-stop' noise, until debris was observed. Engine was shut down and rotor brake applied. As rotor blade flexed during start-up, blades impacted winglet of adjacent parked aircraft. Aircraft had been recently 'ground guided' to its parking position by FBO ramp personnel adjacent to our parked S76 helicopter, without notice of appropriate blade clearance criteria, and appeared appropriate to S76 crew.

Original NASA ASRS Text

Title: S76 HELI ROTOR BLADES HIT AN ADJACENT PARKED BUSINESS JET DURING ENG START AT TEB.

Narrative: UPON START OF #1 ENG ON HELI, ROTOR BLADES MADE CONTACT WITH WINGLET OF ADJACENT PARKED ACFT. DURING WALKAROUND (PREFLT INSPECTION), BLADE CLRNC APPEARED TO BE APPROPRIATE. DURING ENG START, AS BLADE BEGAN TO TURN AND FLEX, THUMP WAS HEARD IN COCKPIT, WHICH WAS INITIALLY INTERPED AS 'DROOP-STOP' NOISE, UNTIL DEBRIS WAS OBSERVED. ENG WAS SHUT DOWN AND ROTOR BRAKE APPLIED. AS ROTOR BLADE FLEXED DURING START-UP, BLADES IMPACTED WINGLET OF ADJACENT PARKED ACFT. ACFT HAD BEEN RECENTLY 'GND GUIDED' TO ITS PARKING POS BY FBO RAMP PERSONNEL ADJACENT TO OUR PARKED S76 HELI, WITHOUT NOTICE OF APPROPRIATE BLADE CLRNC CRITERIA, AND APPEARED APPROPRIATE TO S76 CREW.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.