During handoff the flight crew was given a wrong frequency. Another aircraft relayed to the reporter the correct frequency. When the reporter established contact there was another aircraft called out that was slightly below and within 200 ft at 12 O'clock. The flight crew had no time to take evasive action.

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Attributes
ACN	325719
Time
Date	199601
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : iah
State Reference	TX
Altitude	msl bound lower : 9000 msl bound upper : 9000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zhu tower : day
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 91
Navigation In Use	Other Other
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Piper Twin Turboprop Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	cruise other
Flight Plan	VFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : instrument
Experience	flight time last 90 days : 30 flight time total : 6150 flight time type : 1200
ASRS Report	325719
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	conflict : nmac other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 200 vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

Inbound to houston iah airport, ZHU issued a frequency change. First officer changed frequencys and called center with no response. Momentarily, another aircraft called us and said to contact hou on another frequency. First officer called hou and hou came back with an immediate traffic call, 'VFR traffic 12 O'clock less than a mi.' at that moment a piper cheyenne passed just below and to our left within 200 ft. On our initial frequency change ZHU had given us an incorrect frequency. By the time the other aircraft called and gave us the correct frequency, it was much too late to take evasive action.

Original NASA ASRS Text

Title: DURING HDOF THE FLC WAS GIVEN A WRONG FREQ. ANOTHER ACFT RELAYED TO THE RPTR THE CORRECT FREQ. WHEN THE RPTR ESTABLISHED CONTACT THERE WAS ANOTHER ACFT CALLED OUT THAT WAS SLIGHTLY BELOW AND WITHIN 200 FT AT 12 O'CLOCK. THE FLC HAD NO TIME TO TAKE EVASIVE ACTION.

Narrative: INBOUND TO HOUSTON IAH ARPT, ZHU ISSUED A FREQ CHANGE. FO CHANGED FREQS AND CALLED CTR WITH NO RESPONSE. MOMENTARILY, ANOTHER ACFT CALLED US AND SAID TO CONTACT HOU ON ANOTHER FREQ. FO CALLED HOU AND HOU CAME BACK WITH AN IMMEDIATE TFC CALL, 'VFR TFC 12 O'CLOCK LESS THAN A MI.' AT THAT MOMENT A PIPER CHEYENNE PASSED JUST BELOW AND TO OUR L WITHIN 200 FT. ON OUR INITIAL FREQ CHANGE ZHU HAD GIVEN US AN INCORRECT FREQ. BY THE TIME THE OTHER ACFT CALLED AND GAVE US THE CORRECT FREQ, IT WAS MUCH TOO LATE TO TAKE EVASIVE ACTION.

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.