Air taxi shaken by wake turbulence after near midair collision.

Attributes
ACN	188005
Time
Date	199108
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ack
State Reference	MA
Altitude	msl bound lower : 2200 msl bound upper : 2200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : ack
Operator	common carrier : air taxi
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	descent other
Flight Plan	VFR
Aircraft 2
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	descent other
Flight Plan	VFR
Person 1
Affiliation	company : air taxi
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : instrument pilot : cfi
Experience	flight time last 90 days : 300 flight time total : 900 flight time type : 200
ASRS Report	188005
Person 2
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	conflict : nmac non adherence : far other anomaly other
Independent Detector	other other : unspecified cockpit
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Miss Distance	horizontal : 10 vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

While descending into ack with 2 passenger on board, 8 mi northwest over the normal reporting point (tuckernuck island), an small transport passed overhead of me at 200 ft or less creating a wake turbulence which violently shook my aircraft for 3 mins. She made her position report as I was making mine. Her direction of travel was within 10 degree of mine. Upon consultation with her 30 mins after the incident, she admitted to me that she never saw me and that she was VFR and VMC.

Original NASA ASRS Text

Title: AIR TAXI SHAKEN BY WAKE TURB AFTER NMAC.

Narrative: WHILE DSNDING INTO ACK WITH 2 PAX ON BOARD, 8 MI NW OVER THE NORMAL RPTING POINT (TUCKERNUCK ISLAND), AN SMT PASSED OVERHEAD OF ME AT 200 FT OR LESS CREATING A WAKE TURB WHICH VIOLENTLY SHOOK MY ACFT FOR 3 MINS. SHE MADE HER POS RPT AS I WAS MAKING MINE. HER DIRECTION OF TRAVEL WAS WITHIN 10 DEG OF MINE. UPON CONSULTATION WITH HER 30 MINS AFTER THE INCIDENT, SHE ADMITTED TO ME THAT SHE NEVER SAW ME AND THAT SHE WAS VFR AND VMC.

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.