Jump aircraft almost discharged jumpers in the path of reporter's light transport.

Attributes
ACN	193304
Time
Date	199110
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : pdz
State Reference	CA
Altitude	msl bound lower : 12000 msl bound upper : 12500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ont
Operator	common carrier : air carrier
Make Model Name	Light Transport
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air taxi
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	cruise other
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 10000
ASRS Report	193304
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	conflict : nmac
Independent Detector	other flight crewa
Resolutory Action	other
Consequence	Other
Miss Distance	horizontal : 0 vertical : 500
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was captain on flight en route to lax. Was given traffic at 11 O'clock and 5 mi, at an assigned altitude of 11500 MSL. (We were at 12000 MSL as indicated by both altimeters, separate static system.) we saw an small aircraft in the reported position, however, that traffic was higher than us. We overheard on frequency a parachute jump airplane report ready to release. By this time our traffic was at 12 O'clock and 1 mi still above us, and we suspected that it was the jump plane. In interrupted on frequency and spoke directly to the jump plane and advised not to release as we were below them. The pilot of the jump plane responded and did not release. As we turned away from the small aircraft we heard ontario approach ask them what their altitude was, they responded 11800. I don't know what their actual altitude was but they were still above us. This could have been a real disaster had we not seen them. I would like to suggest 1000 ft separation vertical and 3 mi horizontal for jump aircraft and known IFR aircraft.

Original NASA ASRS Text

Title: JUMP ACFT ALMOST DISCHARGED JUMPERS IN THE PATH OF RPTR'S LTT.

Narrative: I WAS CAPT ON FLT ENRTE TO LAX. WAS GIVEN TFC AT 11 O'CLOCK AND 5 MI, AT AN ASSIGNED ALT OF 11500 MSL. (WE WERE AT 12000 MSL AS INDICATED BY BOTH ALTIMETERS, SEPARATE STATIC SYS.) WE SAW AN SMA IN THE RPTED POS, HOWEVER, THAT TFC WAS HIGHER THAN US. WE OVERHEARD ON FREQ A PARACHUTE JUMP AIRPLANE RPT READY TO RELEASE. BY THIS TIME OUR TFC WAS AT 12 O'CLOCK AND 1 MI STILL ABOVE US, AND WE SUSPECTED THAT IT WAS THE JUMP PLANE. IN INTERRUPTED ON FREQ AND SPOKE DIRECTLY TO THE JUMP PLANE AND ADVISED NOT TO RELEASE AS WE WERE BELOW THEM. THE PLT OF THE JUMP PLANE RESPONDED AND DID NOT RELEASE. AS WE TURNED AWAY FROM THE SMA WE HEARD ONTARIO APCH ASK THEM WHAT THEIR ALT WAS, THEY RESPONDED 11800. I DON'T KNOW WHAT THEIR ACTUAL ALT WAS BUT THEY WERE STILL ABOVE US. THIS COULD HAVE BEEN A REAL DISASTER HAD WE NOT SEEN THEM. I WOULD LIKE TO SUGGEST 1000 FT SEPARATION VERT AND 3 MI HORIZ FOR JUMP ACFT AND KNOWN IFR ACFT.

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.