Near midair collision between air carrier medium large transport and glider.

Attributes
ACN	85244
Time
Date	198804
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : mht
State Reference	NH
Altitude	msl bound lower : 4000 msl bound upper : 4000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mht
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent other
Route In Use	enroute : direct
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Sail Plane
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : flight engineer pilot : cfi
Experience	flight time last 90 days : 200 flight time total : 8500 flight time type : 500
ASRS Report	85244
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 255 flight time total : 10000 flight time type : 1600
ASRS Report	85174
Events
Anomaly	conflict : nmac
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Miss Distance	unspecified : 500
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

En route bos direct mht, radar vectors to visual approach to runway 35 mht, normal flight and landing. En route to mco we received an ACARS message from our operations to call mht tower upon arrival in mco. The captain did so and was told that a sailplane in tow reported a near miss with us approximately 8 mi southeast of mht. He was also told that the tow plane saw and reported nothing. From his (the sailplane pilot) report, we estimate being 4000'. Our final cruise altitude from bos was 7000' MSL. We saw nothing and took no evasive action. I would like to mention that the captain did report a sailplane that he spotted well below us--in fact, below the 3800' broken layer we were above at a point inside the mht control zone while we were on a vector for the visual approach to runway 35 mht. He did not see a towplane though, only the sailplane. Callback conversation with reporter revealed the following: flight crew has heard nothing further from the incident. The glider pilot that filed report said he felt the jet wash so that could have been some distance after jet passed. Reporter said glider pilot may have reconsidered filing near midair collision as was in area where did not belong. This report was filed in case we get more from same area.

Original NASA ASRS Text

Title: NMAC BETWEEN ACR MLG AND GLIDER.

Narrative: ENRTE BOS DIRECT MHT, RADAR VECTORS TO VISUAL APCH TO RWY 35 MHT, NORMAL FLT AND LNDG. ENRTE TO MCO WE RECEIVED AN ACARS MESSAGE FROM OUR OPS TO CALL MHT TWR UPON ARR IN MCO. THE CAPT DID SO AND WAS TOLD THAT A SAILPLANE IN TOW RPTED A NEAR MISS WITH US APPROX 8 MI SE OF MHT. HE WAS ALSO TOLD THAT THE TOW PLANE SAW AND RPTED NOTHING. FROM HIS (THE SAILPLANE PLT) RPT, WE ESTIMATE BEING 4000'. OUR FINAL CRUISE ALT FROM BOS WAS 7000' MSL. WE SAW NOTHING AND TOOK NO EVASIVE ACTION. I WOULD LIKE TO MENTION THAT THE CAPT DID RPT A SAILPLANE THAT HE SPOTTED WELL BELOW US--IN FACT, BELOW THE 3800' BROKEN LAYER WE WERE ABOVE AT A POINT INSIDE THE MHT CTL ZONE WHILE WE WERE ON A VECTOR FOR THE VISUAL APCH TO RWY 35 MHT. HE DID NOT SEE A TOWPLANE THOUGH, ONLY THE SAILPLANE. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: FLT CREW HAS HEARD NOTHING FURTHER FROM THE INCIDENT. THE GLIDER PLT THAT FILED RPT SAID HE FELT THE JET WASH SO THAT COULD HAVE BEEN SOME DISTANCE AFTER JET PASSED. RPTR SAID GLIDER PLT MAY HAVE RECONSIDERED FILING NMAC AS WAS IN AREA WHERE DID NOT BELONG. THIS RPT WAS FILED IN CASE WE GET MORE FROM SAME AREA.

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.