Near midair collision with air carrier at cruise altitude.

Attributes
ACN	88409
Time
Date	198806
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : sxc
State Reference	CA
Altitude	msl bound lower : 8500 msl bound upper : 8500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : lax
Operator	general aviation : personal
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	cruise other
Flight Plan	None
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	Other
Function	instruction : trainee
Qualification	pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 100 flight time total : 1800 flight time type : 800
ASRS Report	88409
Person 2
Function	oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot conflict : nmac non adherence : clearance non adherence : far
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 0 vertical : 100
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Approaching la TCA and speaking with approach we were to transition TCA's far west corner at 8500'. La approach said 'medium large transport at 1 to 2 O'clock 5 miles. He is restr 'below.' we got visual with the medium large transport and determined he was going to overshoot 8000' and pass just feet below. I was manning the radios and (a veteran CFI pilot) flying. She said he's climbing into us and immediately nosed over passing 100' below the jet while descending through 8300' MSL. The controller came back after the disgruntled air carrier pilot had his say, he said we passed 'too close'. The controller came back (over the radio) to us and said 'I told you the jet was restr below at 8000'.' I said, 'controllers have vectored pilots into mountains, when I see my course is about to intersect another plane's I will take any necessary action I feel is necessary.' he (the controller) gave me a phone number to call to discuss it with him. I never called him because I didn't think it would do any good. Callback conversation with reporter revealed the following information: callback indicates apparent overshot of medium large transport brought it to cruise level of reporter's airplane. Since there was no way to out climb the medium large transport, the diving turn was the best maneuver to avoid contact.

Original NASA ASRS Text

Title: NMAC WITH ACR AT CRUISE ALT.

Narrative: APCHING LA TCA AND SPEAKING WITH APCH WE WERE TO TRANSITION TCA'S FAR WEST CORNER AT 8500'. LA APCH SAID 'MLG AT 1 TO 2 O'CLOCK 5 MILES. HE IS RESTR 'BELOW.' WE GOT VISUAL WITH THE MLG AND DETERMINED HE WAS GOING TO OVERSHOOT 8000' AND PASS JUST FEET BELOW. I WAS MANNING THE RADIOS AND (A VETERAN CFI PLT) FLYING. SHE SAID HE'S CLIMBING INTO US AND IMMEDIATELY NOSED OVER PASSING 100' BELOW THE JET WHILE DESCENDING THROUGH 8300' MSL. THE CTLR CAME BACK AFTER THE DISGRUNTLED ACR PLT HAD HIS SAY, HE SAID WE PASSED 'TOO CLOSE'. THE CTLR CAME BACK (OVER THE RADIO) TO US AND SAID 'I TOLD YOU THE JET WAS RESTR BELOW AT 8000'.' I SAID, 'CTLRS HAVE VECTORED PLTS INTO MOUNTAINS, WHEN I SEE MY COURSE IS ABOUT TO INTERSECT ANOTHER PLANE'S I WILL TAKE ANY NECESSARY ACTION I FEEL IS NECESSARY.' HE (THE CTLR) GAVE ME A PHONE NUMBER TO CALL TO DISCUSS IT WITH HIM. I NEVER CALLED HIM BECAUSE I DIDN'T THINK IT WOULD DO ANY GOOD. CALLBACK CONVERSATION WITH REPORTER REVEALED THE FOLLOWING INFORMATION: CALLBACK INDICATES APPARENT OVERSHOT OF MLG BROUGHT IT TO CRUISE LEVEL OF REPORTER'S AIRPLANE. SINCE THERE WAS NO WAY TO OUT CLIMB THE MLG, THE DIVING TURN WAS THE BEST MANEUVER TO AVOID CONTACT.

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.