<< >> NASA ASRS Report 136468, December 1989

Small aircraft with observer pilot aboard conducting practice ADF approach to uncontrolled airport has near midair collision with another small aircraft not communicating with CTAF.

Attributes
ACN	136468
Time
Date	198912
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ewk
State Reference	KS
Altitude	msl bound lower : 1700 msl bound upper : 2200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Small Aircraft
Flight Phase	descent : approach
Flight Plan	None
Aircraft 2
Make Model Name	Small Aircraft, Low Wing, 2 Eng, Retractable Gear
Person 1
Affiliation	Other
Function	other personnel other
Qualification	pilot : atp
Experience	flight time last 90 days : 90 flight time total : 6500 flight time type : 3500
ASRS Report	136468
Person 2
Affiliation	Other
Function	flight crew : captain
Qualification	pilot : commercial pilot : instrument
Experience	flight time total : 3500
ASRS Report	130815
Events
Anomaly	conflict : nmac
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	vertical : 500
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was right seat as safety ATP on small aircraft X. A second observer, knowledgeable but unrated, was left rear seat. Good visibility. The hooded IFR pilot flew the NDB approach, working traffic on CTAF. I suggested the pilot keep high after the low station. He did so. Approximately 1 mi north of the runway the second observer and I saw a light twin small aircraft Y on left base turn final under us, about 500 ft below. I doubt he saw us. He did not use CTAF. I called missed. The pilot initiated miss straight ahead and removed hood. No problem, no close call, but it is unnerving to see a plane pop into view unannounced. Both observers thought their heads were uncaged and eyeballs outside the plane, but we missed this one. 2 obvious thoughts: 1) watch 200%, 2) talk a lot. It is a good idea to stay high on these practice approachs where we wish mostly to hone ADF needle skills.

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Original NASA ASRS Text

Title: SMA WITH OBSERVER PLT ABOARD CONDUCTING PRACTICE ADF APCH TO UNCONTROLLED ARPT HAS NMAC WITH ANOTHER SMA NOT COMMUNICATING WITH CTAF.

Narrative: I WAS R SEAT AS SAFETY ATP ON SMA X. A SECOND OBSERVER, KNOWLEDGEABLE BUT UNRATED, WAS L REAR SEAT. GOOD VISIBILITY. THE HOODED IFR PLT FLEW THE NDB APCH, WORKING TFC ON CTAF. I SUGGESTED THE PLT KEEP HIGH AFTER THE LOW STATION. HE DID SO. APPROX 1 MI N OF THE RWY THE SECOND OBSERVER AND I SAW A LIGHT TWIN SMA Y ON L BASE TURN FINAL UNDER US, ABOUT 500 FT BELOW. I DOUBT HE SAW US. HE DID NOT USE CTAF. I CALLED MISSED. THE PLT INITIATED MISS STRAIGHT AHEAD AND REMOVED HOOD. NO PROB, NO CLOSE CALL, BUT IT IS UNNERVING TO SEE A PLANE POP INTO VIEW UNANNOUNCED. BOTH OBSERVERS THOUGHT THEIR HEADS WERE UNCAGED AND EYEBALLS OUTSIDE THE PLANE, BUT WE MISSED THIS ONE. 2 OBVIOUS THOUGHTS: 1) WATCH 200%, 2) TALK A LOT. IT IS A GOOD IDEA TO STAY HIGH ON THESE PRACTICE APCHS WHERE WE WISH MOSTLY TO HONE ADF NEEDLE SKILLS.

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.