Air carrier climbed above assigned altitude and came in close proximity to another aircraft.

Attributes
ACN	113180
Time
Date	198906
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sfo
State Reference	CA
Altitude	msl bound lower : 4000 msl bound upper : 5200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : oak
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Route In Use	departure sid : sid enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Small Transport, Low Wing, 2 Turboprop Eng
Flight Phase	cruise other
Route In Use	arrival other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Experience	controller military : 6 controller radar : 8
ASRS Report	113180
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 65 flight time total : 5000 flight time type : 65
ASRS Report	113875
Events
Anomaly	altitude deviation : overshoot conflict : airborne less severe non adherence : clearance
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 2500 vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was working bay departure control and was controling small transport Y inbound to sfo at 5000'. Air carrier X had departed sfo-lax on the porte 7 SID. I then assigned air carrier X 4000' because small transport Y was inbound at 5000'. Air carrier X acknowledged the 4000' restriction. I then exchanged traffic information to both aircraft and received acknowledgements. Air carrier X continued to climb through 4000' and passed within 200' vertical and approximately 1/2 mi horizontal from small transport Y. Since air carrier X received and read back both the 4000' restriction and the traffic information on small transport Y at 5000', I can only conclude that air carrier X forgot the restriction. Supplemental information from acn 113875: at the time of the incident I was a 22 day old first officer. Our original altitude was to FL230, however soon after departure we were told to level at 4000' due to traffic. During the climb I was confused as to why I couldn't intercept the radial when I noticed I had the wrong frequency set into my navigation receiver. About this time departure control called and said we were supposed to be at 4000' and we were now out of 5000. I remember seeing 5200 on the altimeter as I pulled the power back and nosed over. After starting down I looked up and saw our traffic about 1000 above and slightly ahead of us. I don't know if the other aircraft took evasive action.

Original NASA ASRS Text

Title: ACR CLIMBED ABOVE ASSIGNED ALT AND CAME IN CLOSE PROX TO ANOTHER ACFT.

Narrative: I WAS WORKING BAY DEP CTL AND WAS CTLING SMT Y INBND TO SFO AT 5000'. ACR X HAD DEPARTED SFO-LAX ON THE PORTE 7 SID. I THEN ASSIGNED ACR X 4000' BECAUSE SMT Y WAS INBND AT 5000'. ACR X ACKNOWLEDGED THE 4000' RESTRICTION. I THEN EXCHANGED TFC INFO TO BOTH ACFT AND RECEIVED ACKNOWLEDGEMENTS. ACR X CONTINUED TO CLIMB THROUGH 4000' AND PASSED WITHIN 200' VERTICAL AND APPROX 1/2 MI HORIZ FROM SMT Y. SINCE ACR X RECEIVED AND READ BACK BOTH THE 4000' RESTRICTION AND THE TFC INFO ON SMT Y AT 5000', I CAN ONLY CONCLUDE THAT ACR X FORGOT THE RESTRICTION. SUPPLEMENTAL INFORMATION FROM ACN 113875: AT THE TIME OF THE INCIDENT I WAS A 22 DAY OLD F/O. OUR ORIGINAL ALT WAS TO FL230, HOWEVER SOON AFTER DEP WE WERE TOLD TO LEVEL AT 4000' DUE TO TFC. DURING THE CLIMB I WAS CONFUSED AS TO WHY I COULDN'T INTERCEPT THE RADIAL WHEN I NOTICED I HAD THE WRONG FREQ SET INTO MY NAVIGATION RECEIVER. ABOUT THIS TIME DEP CTL CALLED AND SAID WE WERE SUPPOSED TO BE AT 4000' AND WE WERE NOW OUT OF 5000. I REMEMBER SEEING 5200 ON THE ALTIMETER AS I PULLED THE POWER BACK AND NOSED OVER. AFTER STARTING DOWN I LOOKED UP AND SAW OUR TFC ABOUT 1000 ABOVE AND SLIGHTLY AHEAD OF US. I DON'T KNOW IF THE OTHER ACFT TOOK EVASIVE ACTION.

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.