<< >> NASA ASRS Report 96787, October 1988

Medium large transport on VOR approach encounters small transport transiting the control zone VFR 1000' above his altitude.

Attributes
ACN	96787
Time
Date	198810
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : lih
State Reference	HI
Altitude	msl bound lower : 2000 msl bound upper : 2000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zhn
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	descent : approach
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air taxi
Make Model Name	Small Transport, Low Wing, 2 Turboprop Eng
Flight Phase	cruise other
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 135 flight time total : 11000 flight time type : 9000
ASRS Report	96787
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	conflict : airborne less severe
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Miss Distance	horizontal : 12000 vertical : 1000
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

While executing VOR/DME runway 35 approach, lihue, hi, small aircraft aircraft crossed approximately 1000' above us and about 2 mi in front of us. He was a VFR, air tour operation. We were at initial approach altitude of 2000' and 13.0 DME. WX conditions were 2500' scattered and visibility 15 mi. The concern here is the mix of crossing VFR traffic and IFR traffic on approach within the confines of the approach corridor. Conflict could possibly occur if cloud conditions were broken to overcast with lower bases and small aircraft pilot decides to 'duck under' to stay VFR.

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Original NASA ASRS Text

Title: MLG ON VOR APCH ENCOUNTERS SMT TRANSITING THE CTL ZONE VFR 1000' ABOVE HIS ALT.

Narrative: WHILE EXECUTING VOR/DME RWY 35 APCH, LIHUE, HI, SMA ACFT CROSSED APPROX 1000' ABOVE US AND ABOUT 2 MI IN FRONT OF US. HE WAS A VFR, AIR TOUR OPERATION. WE WERE AT INITIAL APCH ALT OF 2000' AND 13.0 DME. WX CONDITIONS WERE 2500' SCATTERED AND VISIBILITY 15 MI. THE CONCERN HERE IS THE MIX OF XING VFR TFC AND IFR TFC ON APCH WITHIN THE CONFINES OF THE APCH CORRIDOR. CONFLICT COULD POSSIBLY OCCUR IF CLOUD CONDITIONS WERE BROKEN TO OVCST WITH LOWER BASES AND SMA PLT DECIDES TO 'DUCK UNDER' TO STAY VFR.

Data retrieved from NASA's ASRS site as of August 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.