Conflict airborne.

Attributes
ACN	277710
Time
Date	199407
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : pdz airport : cno
State Reference	CA
Altitude	msl bound lower : 2200 msl bound upper : 3000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : ont
Operator	general aviation : personal
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 135
Flight Phase	descent other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 21 flight time total : 420 flight time type : 95
ASRS Report	277710
Person 2
Affiliation	Other
Function	other personnel other
Qualification	pilot : private
Events
Anomaly	conflict : airborne less severe other anomaly other
Independent Detector	other flight crewa
Resolutory Action	controller : issued new clearance flight crew : took evasive action other
Consequence	Other
Miss Distance	horizontal : 500 vertical : 800
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

Aircraft #1 (air carrier 1), C172RG/a flying multiple IFR approachs in VFR conditions into cno airport. On board: pilot (me) and rated check pilot in contact with ontario approach on 135.4 aircraft #2 (air carrier #2), moderate size twin or small commuter, possibly twin turbo-propeller. Air carrier #1 was eastbound toward pdz (approximately 5 NM west) level at 3000 ft MSL on radar vectors for the VOR-B into cno. Traffic was called at 5 O'clock, 3 mi, 3800 ft descending. The check pilot of air carrier #1 attempted to get a visual on air carrier #2 but was hindered by the relative position (slightly high, to the rear, in the setting sun. Approximately 1 min later, air carrier #2 was called at 5 O'clock, 1/2 mi, 3200 ft descending. The ontario controller also recommended an immediate descent. Air carrier #1 initiated an immediate descent to 2200 ft and spotted air carrier #2 approximately 800 ft above and less than 500 ft off the left wing of my aircraft. The twin (air carrier #2) subsequently landed at riverside (ral) airport. Other observations: it did not seem that air carrier #2 was in contact with the sector controller (ont approach) in charge of that airplane. Personal opinion: the incident was caused by poor communication between air carrier #2 and ont approach or between the controllers of ont approach in traffic management, if air carrier #2 was in contact with ontario. Additionally the possible mid-air was avoided by the sterling diligence of air carrier #1 sector controller, her recommendation for the immediate descent, and the implementation thereof.

Original NASA ASRS Text

Title: CONFLICT AIRBORNE.

Narrative: ACFT #1 (ACR 1), C172RG/A FLYING MULTIPLE IFR APCHS IN VFR CONDITIONS INTO CNO ARPT. ON BOARD: PLT (ME) AND RATED CHK PLT IN CONTACT WITH ONTARIO APCH ON 135.4 ACFT #2 (ACR #2), MODERATE SIZE TWIN OR SMALL COMMUTER, POSSIBLY TWIN TURBO-PROP. ACR #1 WAS EBOUND TOWARD PDZ (APPROX 5 NM W) LEVEL AT 3000 FT MSL ON RADAR VECTORS FOR THE VOR-B INTO CNO. TFC WAS CALLED AT 5 O'CLOCK, 3 MI, 3800 FT DSNDING. THE CHK PLT OF ACR #1 ATTEMPTED TO GET A VISUAL ON ACR #2 BUT WAS HINDERED BY THE RELATIVE POS (SLIGHTLY HIGH, TO THE REAR, IN THE SETTING SUN. APPROX 1 MIN LATER, ACR #2 WAS CALLED AT 5 O'CLOCK, 1/2 MI, 3200 FT DSNDING. THE ONTARIO CTLR ALSO RECOMMENDED AN IMMEDIATE DSCNT. ACR #1 INITIATED AN IMMEDIATE DSCNT TO 2200 FT AND SPOTTED ACR #2 APPROX 800 FT ABOVE AND LESS THAN 500 FT OFF THE L WING OF MY ACFT. THE TWIN (ACR #2) SUBSEQUENTLY LANDED AT RIVERSIDE (RAL) ARPT. OTHER OBSERVATIONS: IT DID NOT SEEM THAT ACR #2 WAS IN CONTACT WITH THE SECTOR CTLR (ONT APCH) IN CHARGE OF THAT AIRPLANE. PERSONAL OPINION: THE INCIDENT WAS CAUSED BY POOR COM BTWN ACR #2 AND ONT APCH OR BTWN THE CTLRS OF ONT APCH IN TFC MGMNT, IF ACR #2 WAS IN CONTACT WITH ONTARIO. ADDITIONALLY THE POSSIBLE MID-AIR WAS AVOIDED BY THE STERLING DILIGENCE OF ACR #1 SECTOR CTLR, HER RECOMMENDATION FOR THE IMMEDIATE DSCNT, AND THE IMPLEMENTATION THEREOF.

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.